CN102544930A

CN102544930A - Leakage protection plug

Info

Publication number: CN102544930A
Application number: CN2012100573998A
Authority: CN
Inventors: 刘睿刚
Original assignee: FOSHAN SUNCUPID ELECTRONIC FACTORY Ltd
Current assignee: FOSHAN SUNCUPID ELECTRONIC FACTORY Ltd
Priority date: 2012-03-07
Filing date: 2012-03-07
Publication date: 2012-07-04
Anticipated expiration: 2032-03-07
Also published as: CN102544930B

Abstract

The invention discloses a leakage protection plug. Electrical shock hazards caused by failures of electric appliances as well as accidental electrification of a ground wire can be prevented. A first resistance-capacitance element, a second resistance-capacitance element, a photoelectric coupler and a trigger circuit are also arranged on the leakage protection plug, wherein a detection loop which is formed by connecting the first resistance-capacitance element, one input end and the other input end of the photoelectric coupler, and the second resistance-capacitance element in series is connected between the ground wire and a zero wire; a signal output by the photoelectric coupler is sent to the input end of the trigger circuit; and the output end of the trigger circuit is connected with the control end of a driving circuit of an electromagnetic coil.

Description

A kind of leakage protecting plug

Technical field

The present invention relates to Electrical Safety resist technology field, especially relate to a kind of leakage protecting plug.

Background technology

Chinese patent document CN1142618C discloses a kind of leakage protecting plug; Not only be provided with zero sequence current mutual inductor that phase line and zero line all pass on this leakage protecting plug, also be provided with the ground wire electrified detection inductor that ground wire passes; Therefore it not only can detect between load end phase line and the zero line and have or not residual current; (for example: 10mA), it will be threaded off in 0.1S immediately, cuts off phase line, zero line and ground wire when occurring residual current between phase, the zero line and reaching the threshold values that presets; And when the ground protection system exception causes the ground wire accident charged; It can also detect the load end ground wire has the zero accident electric current; When ground wire unexpected electric current occurs and reaches the threshold values that presets (for example: 10mA); It also can be threaded off in 0.1S immediately, cuts off phase line, zero line and ground wire, thereby has protected people's life security.But; When it when the ground wire of ground protection system disappearance (for example: the virtual connection of socket ground wire causes no ground connection) and leakage protecting plug load end consuming device insulation fault leak electricity; Or when ground protection system exception (for example: phase line, earth short) causes the ground wire accident charged; Dangerous voltage on the exposed metal parts band of consuming device is caused in the capital, but they all do not constitute the loop thereby also do not produce the unexpected electric current of residual current or ground wire, so; Although consuming device exposed metal parts have been with dangerous voltage; But existing leakage protecting plug can not threaded off in this case automatically, has only when people touch these with the exposed metal parts that power on just to produce residual current or the unexpected electric current of ground wire, thereby leakage protecting plug is threaded off and phase line, zero line, ground wire disconnection in 0.1S; Ensured people's safety though it can be threaded off in the moment of 0.1S, in this case the people be earlier by electricity the back earth leakage protective device outage of could threading off once.So, the problem that existing leakage protecting plug still can cause people to get an electric shock.

As everyone knows, photoelectrical coupler mainly is made up of the light-emitting component of input and the photo detector of output, and light-emitting component and photo detector are installed in the same encapsulation, transmit signal by light between light-emitting component and the photo detector.Meaning shown in Figure 1 is existing a kind of photoelectrical coupler 100; Its input constitutes light-emitting component by neon lamp 100-1; Its output constitutes photo detector by phototriode 100-2, can be known by the characteristic of neon lamp 100-1, and the voltage that neon lamp 100-1 build-up of luminance is lighted all needs usually about 85V or is above just passable; Hence one can see that; When having adopted this kind photoelectrical coupler 100 to detect the voltage between ground wire and the zero line on the leakage protecting plug, just there is following shortcoming in this kind leakage protecting plug: the voltage between ground wire and zero line be low to moderate below the 50V (for example: 24V) fashionable, the photoelectrical coupler 100 inner neon lamp 100-1 that detect in the loop just can not light by build-up of luminance; Photoelectrical coupler 100 cisco unity malfunctions; Can't send signal and make the leakage protecting plug tripping operation, so the leakage protecting plug that uses this kind photoelectrical coupler 100 to be used as detecting element is can not reach to ensure people's aim of safe power utilization.

Summary of the invention

The object of the present invention is to provide a kind of leakage protecting plug that can overcome above-mentioned existing leakage protecting plug defective; Electric leakage or ground wire not only can take place in load end phase, zero line road and meet accident and can all break off phase line contact, zero line contact and ground wire contact in time when charged in it; And its consuming device electric leakage of ground connection disappearance and leakage protecting plug load end occurring in the ground protection system can also touch consuming device people or livestock when causing electric appliance casing and latch and ground wire accident to be with dangerous voltage and will thread off automatically before; In time break off phase line, zero line and ground wire, for people provide the Electrical Safety guarantee.

Technical solution proposed by the invention is such:

A kind of leakage protecting plug; Include shell and latch, phase line, zero line, ground wire, zero sequence current mutual inductor, test loop, electromagnetic trip and locker; This electromagnetic trip and locker comprise solenoid and drive circuit thereof, contact; The drive circuit of said solenoid mainly is made up of the 1st rectification circuit, the 1st controllable silicon; One output of said zero sequence current mutual inductor secondary winding and another output are connected with another input with an input of the drive circuit of said solenoid respectively; Also be provided with the 1st Resistor-Capacitor Unit, the 2nd Resistor-Capacitor Unit, photoelectrical coupler, circuits for triggering; Between said ground wire and zero line, be connected with the detection loop that an input and another input, said the 2nd Resistor-Capacitor Unit by said the 1st Resistor-Capacitor Unit, said photoelectrical coupler are in series, the signal of said photoelectrical coupler output is sent into the input of said circuits for triggering, and the output of said circuits for triggering is connected with the control end of the drive circuit of said solenoid.

In said detection loop, also be provided with the 2nd rectification circuit; Said the 1st Resistor-Capacitor Unit one end is connected with said ground wire; The 1st Resistor-Capacitor Unit other end is connected with the 2nd rectification circuit one input; Another input of the 2nd rectification circuit is connected with the 2nd Resistor-Capacitor Unit one end, and the 2nd Resistor-Capacitor Unit other end is connected with said zero line, and the 2nd rectification circuit one output is connected with another input with an input of said photoelectrical coupler respectively with another output.

In said detection loop, also be provided with the 1st diode; Said the 1st diode one end is connected with said ground wire; The 1st diode other end is connected with the 1st Resistor-Capacitor Unit one end; The 1st Resistor-Capacitor Unit other end is connected with an input of photoelectrical coupler, and another input of photoelectrical coupler is connected with the 2nd Resistor-Capacitor Unit one end, and the 2nd Resistor-Capacitor Unit other end is connected with said zero line.

In said detection loop, also be provided with the 2nd diode; Said the 1st Resistor-Capacitor Unit other end is connected with said the 2nd diode one end with the tie point of an input of said photoelectrical coupler, and said the 2nd Resistor-Capacitor Unit one end is connected with said the 2nd diode other end with the tie point of another input of said photoelectrical coupler.

The the said the 1st or the 2nd Resistor-Capacitor Unit is the assembly of resistance or electric capacity or resistance and electric capacity.

In the drive circuit of said solenoid, also be provided with amplifying circuit; One input of the drive circuit of said solenoid and another input are respectively an input and another input of said amplifying circuit, and said amplifying circuit triggers the triggering signal of output output and sends into the 1st controllable silicon trigger electrode.

One input of the drive circuit of said solenoid and another input are respectively said the 1st silicon controlled trigger electrode and negative electrode.

In the drive circuit of said solenoid, also be provided with the 1st resistance, the 2nd resistance, the 3rd diode, the 1st voltage stabilizing didoe; Said the 1st resistance one end is connected with said the 1st rectification circuit output end is anodal; The 1st resistance other end is connected with the 2nd resistance one end; The 2nd resistance other end is connected with the 3rd diode cathode; The 3rd diode cathode is connected with said the 1st rectification circuit output end negative pole; The 1st resistance other end is connected with the 1st voltage stabilizing didoe negative pole with the tie point of the 2nd resistance one end, and the 1st voltage stabilizing didoe is anodal to be connected with the 1st rectification circuit output end negative pole, and an input of the drive circuit of said solenoid and another input are respectively said the 1st controllable silicon trigger electrode and said the 3rd diode cathode.

Said circuits for triggering are made up of the 1st triode, the 3rd resistance; One output of said photoelectrical coupler is connected with the power end of said amplifying circuit, the collector electrode of said the 1st triode respectively; Another output of said photoelectrical coupler is connected with base stage, the 3rd resistance one end of said the 1st triode respectively; The 3rd resistance other end is connected with said amplifying circuit ground end, the 1st rectification circuit output end negative pole respectively, and the emitter of the 1st triode is connected with said the 1st silicon controlled trigger electrode.

In the drive circuit of said solenoid, also be provided with the 2nd controllable silicon, its circuits for triggering are made up of the 1st triode, the 3rd resistance, the 4th resistance, the 2nd voltage stabilizing didoe; Said the 4th resistance one end is connected with the 1st rectification circuit output end is anodal; The 4th resistance other end is connected with the 2nd voltage stabilizing didoe negative pole; The 2nd voltage stabilizing didoe is anodal to be connected with said the 1st rectification circuit output end negative pole; One output of said photoelectrical coupler is connected with the collector electrode of said the 2nd voltage stabilizing didoe negative pole, the 1st triode respectively; Another output of said photoelectrical coupler is connected with base stage, the 3rd resistance one end of said the 1st triode respectively; The 3rd resistance other end is anodal with the 2nd voltage stabilizing didoe respectively, the 1st rectification circuit output end negative pole is connected, and the emitter of said the 1st triode is connected with the 2nd controllable silicon trigger electrode, and the 2nd silicon controlled anode and negative electrode are connected in parallel with the 1st silicon controlled anode and negative electrode respectively.

In the drive circuit of said solenoid, also be provided with the 2nd controllable silicon; Its circuits for triggering are made up of the 1st triode, the 3rd resistance; One output of said photoelectrical coupler is connected with said the 1st voltage stabilizing didoe negative pole; Another output of said photoelectrical coupler is connected with base stage, the 3rd resistance one end of said the 1st triode respectively, and the 3rd resistance other end is connected with the 1st voltage stabilizing didoe is anodal, and the collector electrode of the 1st triode is connected with the 1st voltage stabilizing didoe negative pole; The emitter of said the 1st triode is connected with the 2nd controllable silicon trigger electrode, and the 2nd silicon controlled anode and negative electrode are connected in parallel with the 1st silicon controlled anode and negative electrode respectively.

Said circuits for triggering are made up of the 3rd resistance, the 5th resistance, the 6th resistance, voltage comparator circuit, unidirectional breakover element; One output of said photoelectrical coupler is connected with the power end of said amplifying circuit; Another output of photoelectrical coupler is connected with an input of the 3rd resistance one end, voltage comparator circuit respectively; The 3rd resistance other end is connected with the ground end of amplifying circuit; Said the 5th resistance one end is connected with the power end of said amplifying circuit, and the 5th resistance other end is connected with the 6th resistance one end, and the 6th resistance other end is connected with the ground end of said amplifying circuit; The 5th resistance other end is connected with another input of voltage comparator circuit with the tie point of the 6th resistance one end, and the voltage comparator circuit output is connected with said the 1st silicon controlled trigger electrode through unidirectional breakover element.

In the drive circuit of said solenoid, also be provided with the 2nd controllable silicon; Its circuits for triggering are made up of the 3rd resistance, the 5th resistance, the 6th resistance, voltage comparator circuit, the 4th resistance, the 2nd voltage stabilizing didoe; Said the 4th resistance one end is connected with the 1st rectification circuit output end is anodal; The 4th resistance other end is connected with the 2nd voltage stabilizing didoe negative pole; The 2nd voltage stabilizing didoe is anodal to be connected with said the 1st rectification circuit output end negative pole, and an output of said photoelectrical coupler is connected with said the 2nd voltage stabilizing didoe negative pole, and another output of photoelectrical coupler is connected with an input of the 3rd resistance one end, voltage comparator circuit respectively; The 3rd resistance other end is connected with the 2nd voltage stabilizing didoe is anodal; Said the 5th resistance one end is connected with said the 2nd voltage stabilizing didoe negative pole, and the 5th resistance other end is connected with the 6th resistance one end, and the 6th resistance other end is connected with said the 2nd voltage stabilizing didoe is anodal; The 5th resistance other end is connected with another input of voltage comparator circuit with the tie point of the 6th resistance one end, and the voltage comparator circuit output is connected with the 2nd silicon controlled trigger electrode.

In the drive circuit of said solenoid, also be provided with the 2nd controllable silicon; Its circuits for triggering are made up of the 3rd resistance, the 5th resistance, the 6th resistance, voltage comparator circuit; One output of said photoelectrical coupler is connected with said the 1st voltage stabilizing didoe negative pole; Another output of photoelectrical coupler is connected with an input of the 3rd resistance one end, voltage comparator circuit respectively, and the 3rd resistance other end is connected with the 1st voltage stabilizing didoe is anodal, and said the 5th resistance one end is connected with said the 1st voltage stabilizing didoe negative pole; The 5th resistance other end is connected with the 6th resistance one end; The 6th resistance other end is connected with said the 1st voltage stabilizing didoe is anodal, and the 5th resistance other end is connected with another input of voltage comparator circuit with the tie point of the 6th resistance one end, and the voltage comparator circuit output is connected with the 2nd silicon controlled trigger electrode.

Said voltage comparator circuit is selected voltage comparator exclusive disjunction amplifier for use.

Said unidirectional breakover element is the 4th diode.

Said unidirectional breakover element is the 2nd triode.

At least be provided with 1 light-emitting diode in the inside of said photoelectrical coupler, described at least 1 light-emitting diode series connection is connected between the input and another input of said photoelectrical coupler.

Be provided with 2 to 4 light-emitting diodes in the inside of said photoelectrical coupler, said 2 to 4 light-emitting diodes are connected between the input and another input of said photoelectrical coupler with parallel connection or series system.

Compared with prior art, the present invention has following remarkable result:

(1), leakage protecting plug of the present invention is owing to be connected with the detection loop that is composed in series by Resistor-Capacitor Unit and the built-in light-emitting component of photoelectrical coupler between ground wire and zero line; When in use; When in case the phase of leakage protecting plug load end, the electric leakage of the consuming device fault on the zero line and ground protection system ground wire lack (for example: the virtual connection of socket ground wire causes no ground connection); Metal parts that consuming device exposes and leakage protecting plug ground wire all can be with dangerous voltage; When dangerous voltage reaches predetermined value; The built-in light-emitting component of photoelectrical coupler will be shinny; The built-in light-sensitive element of photoelectrical coupler will be exported signal by this optical excitation and trigger the controllable silicon conducting in the drive circuit of solenoid, thereby leakage protecting plug just can in time be broken off phase line, zero line and ground wire before people touch consuming device entirely.

(2), leakage protecting plug of the present invention is owing to be connected with the detection loop that is composed in series by Resistor-Capacitor Unit and the built-in light-emitting component of photoelectrical coupler between ground wire and zero line; When in use; When in case the ground protection system exception causes the ground wire accident to be with dangerous voltage; The built-in light-emitting component of photoelectrical coupler will be shinny; The built-in light-sensitive element of photoelectrical coupler will be exported signal and trigger the controllable silicon conducting in the electromagnetic coil driving circuit by this optical excitation, thereby leakage protecting plug just can in time be broken off phase line, zero line and ground wire before people touch electrical equipment entirely.

(3), leakage protecting plug of the present invention is because the detection loop that need only work as between ground wire and the zero line has faint electric current to pass through; The built-in photo detector of photoelectrical coupler just has signal output; After triode or voltage comparator circuit processing, solenoid is threaded off; So, when the abnormal voltage that occurs on the ground wire is low to moderate 24V, also can make solenoid thread off and break off phase, zero, ground wire entirely.

(4), leakage protecting plug of the present invention also can be threaded off when the phase line of power end and zero line reversal connection automatically; Can not reset; Have only just coming into operation after the correction of the wiring state of supply socket phase line and zero line; Forcibly standard the user side supply socket wiring requirement that must meet national regulation connect, in case other contingencies take place when using.

(5), the ground wire on the leakage protecting plug of the present invention need not to be provided with ground wire instrument transformer and circuits for triggering, thereby provides cost savings.

(6), on the detection loop of leakage protecting plug of the present invention because the ingenious cooperation through electric capacity or bridge rectifier and photoelectrical coupler; Photoelectricity transmission efficient, the sensitivity of photoelectrical coupler are effectively improved; Reduce greatly flowing through the requirement that detects the current signal on the loop; Improved the impedance between ground wire and the zero line, made it satisfy the requirement of safety standard.

(7), on the detection loop of leakage protecting plug of the present invention because through increasing the inner light-emitting diode of photoelectrical coupler; Make the parallel connection of these light-emitting diodes or be connected in series between the photoelectrical coupler input; Thereby the photoelectricity transmission efficient, the sensitivity that improve photoelectrical coupler effectively; Reduce greatly flowing through the requirement that detects the current signal on the loop, improved the impedance between ground wire and the zero line, make it satisfy the requirement of safety standard.

Leakage protecting plug of the present invention is mainly used on the earth leakage protective of various household electrical appliance.

Description of drawings

Fig. 1 is the circuit structure principle schematic of existing a kind of photoelectrical coupler.

Fig. 2 is the leakage protecting plug electrical principle sketch map of the 1st embodiment of the present invention.

Fig. 3 is the leakage protecting plug electrical principle sketch map of the 2nd embodiment of the present invention.

Fig. 4 is the leakage protecting plug electrical principle sketch map of the 3rd embodiment of the present invention.

Fig. 5 is the leakage protecting plug electrical principle sketch map of the 4th embodiment of the present invention.

Fig. 6 is the leakage protecting plug electrical principle sketch map of the 5th embodiment of the present invention.

Fig. 7 is the leakage protecting plug electrical principle sketch map of the 6th embodiment of the present invention.

Fig. 8 is the leakage protecting plug electrical principle sketch map of the 7th embodiment of the present invention.

Fig. 9 is the leakage protecting plug electrical principle sketch map of the 8th embodiment of the present invention.

Figure 10 is the leakage protecting plug electrical principle sketch map of the 9th embodiment of the present invention.

Embodiment

Through following embodiment the present invention is done further to set forth in detail.

Embodiment 1

Referring to shown in Figure 2; A kind of leakage protecting plug; Mainly by phase line 8 and zero line 9 and ground wire 10, zero sequence current mutual inductor 15, test loop 16, electromagnetic trip and the locker of the phase line 5 of shell and latch, power end and zero line 6 and ground wire 7, load end; This electromagnetic trip and locker comprise solenoid 11 and drive circuit, phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2, ground wire contact 3 and 4, spring, the push rod that resets, and the 1st Resistor-Capacitor Unit the 17, the 2nd Resistor-Capacitor Unit 18, photoelectrical coupler 19, circuits for triggering are formed.Between ground wire 7 and zero line 6, be connected with by the 1st Resistor-Capacitor Unit 17, an input of photoelectrical coupler 19 and the detection loop that another input, the 2nd Resistor-Capacitor Unit 18 are in series; One output of photoelectrical coupler 19 and another output respectively with the drive circuit of solenoid 11 in power end be connected with the input of circuits for triggering, the output of circuits for triggering is connected with the control end of the drive circuit of solenoid 11.

In the present embodiment; The drive circuit of said solenoid 11 mainly is made up of the 1st rectification circuit the 12, the 1st controllable silicon 13, amplifying circuit 14; One output of said zero sequence current mutual inductor 15 secondary winding is connected with another input with an input of said amplifying circuit 14 respectively with another output, and amplifying circuit 14 triggers the signal of output output and sends into the 1st controllable silicon 13 trigger electrodes.

In the present embodiment, circuits for triggering select for use the 1st triode the 20, the 3rd resistance 32 to form, and also can select for use voltage comparator circuit, resistance, unidirectional breakover element to form.

In the present embodiment; Be connected between the ground wire 7 and zero line 6 of power end by the 1st Resistor-Capacitor Unit 17, an input of photoelectrical coupler 19 and the detection loop that another input, the 2nd Resistor-Capacitor Unit 18 are in series; One end of said the 1st Resistor-Capacitor Unit 17 is connected with ground wire; The other end of the 1st Resistor-Capacitor Unit 17 is connected with an input of photoelectrical coupler 19; Another input of photoelectrical coupler 19 is connected with an end of the 2nd Resistor-Capacitor Unit 18; The other end of the 2nd Resistor-Capacitor Unit 18 is connected with zero line 6, an output of photoelectrical coupler 19 and the power end of amplifying circuit 14 (+VS) being connected, another output of photoelectrical coupler 19 is connected with the base stage of the 3rd resistance 32 1 ends, the 1st triode 20 respectively; The other end of the 3rd resistance 32 respectively with the ground end (GND) of the 1st rectification circuit 12 negative pole of output end (-), amplifying circuit 14; The power end of the collector electrode of the 1st triode 20 and amplifying circuit 14 (+VS) being connected, the emitter of the 1st triode 20 is connected with the trigger electrode of the 1st controllable silicon 13, and the anode of the 1st controllable silicon 13 is connected with negative pole (-) with the positive pole (+) of the 1st rectification circuit 12 outputs respectively with negative electrode.

In the present embodiment, the 1st Resistor-Capacitor Unit 17 is an electric capacity, and the 1st Resistor-Capacitor Unit 17 also can adopt the assembly of resistance or resistance and electric capacity; The 2nd Resistor-Capacitor Unit 18 is a resistance, and the 2nd Resistor-Capacitor Unit 18 also can adopt the assembly of electric capacity or resistance and electric capacity.

In the present embodiment; The inside of photoelectrical coupler 19 is provided with the light-emitting component of 2 light-emitting diodes as photoelectrical coupler; These 2 light-emitting diodes are connected in parallel between the input and another input of photoelectrical coupler 19, thereby make no matter photoelectrical coupler 19 is the positive half wave at signal, still when the negative half-wave of signal; All there is lumination of light emitting diode photoelectrical coupler 19 inside, thereby have improved the photoelectricity transmission efficient and the sensitivity of photoelectrical coupler 19 widely.

In the present embodiment; Being connected between the ground wire 7 and zero line 6 of power end, also can detect this between ground wire 10 and zero line 9 that loop is connected load end by the 1st Resistor-Capacitor Unit 17, an input of photoelectrical coupler 19 and the detection loop that another input, the 2nd Resistor-Capacitor Unit 18 are in series.

During use; Press the push rod that resets of leakage protecting plug; Phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2 and ground wire contact 3 and 4 are all normally connected; The phase line 8 of load end, zero line 9, ground wire 10 are connected with phase line 5, zero line 6, the ground wire 7 of power end respectively, and

ground wire

7 and 10 is because the effect of ground connection is clamped at about zero volt voltage, and zero line 6 and 9 also is about zero volt simultaneously; The electric current that does not just have electric current to flow through or flow through by the 1st Resistor-Capacitor Unit 17, photoelectrical coupler 19 1 inputs and detection loop that another input, the 2nd Resistor-Capacitor Unit 18 are formed that is connected like this between ground wire 7 and the zero line 6 of leakage protecting plug power end does not reach the threshold values (for example: 10 microamperes) that presets; The output of photoelectrical coupler 19 does not have signal to export to the base stage of the 1st triode 20, and the 1st triode 20 ends, and the 1st controllable silicon 13 ends; Leakage protecting plug just remains on the "on" position that resets like this, thereby for the power supply of the consuming device of its lower end with ground connection is provided.

When the ground protection system unusual (for example: phase, ground short circuit cause the ground wire accident charged) takes place when causing

ground wire

7 and 10 accidents to be with dangerous voltage; The detection loop of being made up of the 1st Resistor-Capacitor Unit 17, an input and another input, the 2nd Resistor-Capacitor Unit 18 of photoelectrical coupler 19 that is connected like this between ground wire 7 and the zero line 6 of power end just has an electric current to flow through; The lumination of light emitting diode of photoelectrical coupler 19 inside; Thereby exciting light electric coupling 19 makes its output output signal to the base stage of the 1st triode 20 and makes 20 conductings of the 1st triode; The be triggered conducting and leakage protecting plug is threaded off of the 1st controllable silicon 13; Before people touch consuming device, just can in time all break off phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2, ground wire contact 3 and 4, thereby ensure people's Electrical Safety better.

When the phase line 8 of load end, on the zero line 9 consuming device fault electric leakage and in the normal situation of ground protection system following time; Can produce a residual current through

ground wire

10 and 7; Zero sequence current mutual inductor 15 can detect the residual current between phase, the zero line and export a signal and give amplifying circuit 14, and when residual current reached the threshold values (for example: 10 milliamperes) that presets, amplifying circuit 14 triggered output output signal; The 1st triode 20 oppositely ends; The conducting that is triggered of the 1st controllable silicon 13, leakage protecting plug is threaded off, and before people touch consuming device, just can in time all break off phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2, ground wire contact 3 and 4; And when the phase line 8 of load end, on the zero line 9 consuming device fault electric leakage and when not having ground connection (for example: the ground wire virtual connection causes no ground connection on the socket) in the ground protection system; Metal parts that consuming device exposes and leakage protecting

plug ground wire

10 and 7 all can be with dangerous voltage; The detection loop of being made up of the 1st Resistor-Capacitor Unit 17, an input and another input, the 2nd Resistor-Capacitor Unit 18 of photoelectrical coupler 19 that is connected between leakage protecting plug power end ground wire 7 and the zero line 6 just has an electric current to flow through; The lumination of light emitting diode of photoelectrical coupler 19 inside; Thereby exciting light electric coupling 19 makes its output output signal to the base stage of the 1st triode 20 and makes 20 conductings of the 1st triode; Be triggered conducting and leakage protecting plug of the 1st controllable silicon 13 threaded off; Before people touch consuming device, just can in time all break off phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2, ground wire contact 3 and 4, thereby ensure people's Electrical Safety better.

Embodiment 2

Referring to shown in Figure 3, present embodiment is compared with embodiment 1, and present embodiment has increased by the 2nd rectification circuit 22.

In the present embodiment; Be made up of an input and another input, the 2nd Resistor-Capacitor Unit 18 of an input of the 1st Resistor-Capacitor Unit the 17, the 2nd rectification circuit 22 and another input, photoelectrical coupler 19 and detect the loop and be connected between the ground wire 7 and zero line 6 of power end, an output of the 2nd rectification circuit 22 is connected with another input with an input of photoelectrical coupler 19 respectively with another output.

In the present embodiment, the 1st Resistor-Capacitor Unit 17 is a resistance, also can adopt the assembly of electric capacity or resistance and electric capacity; The 2nd Resistor-Capacitor Unit 18 is a resistance, also can adopt the assembly of electric capacity or resistance and electric capacity.

In the present embodiment, the inside of photoelectrical coupler 19 is provided with 1 light-emitting diode, also can be between the input and another input of 2 to 4 light-emitting diodes of internal series-connection at photoelectrical coupler 19 of photoelectrical coupler 19.

In the present embodiment; Be connected an input and another input, an input of photoelectrical coupler 19 and the detection loop that another input, the 2nd Resistor-Capacitor Unit 18 are in series between the ground wire 7 and zero line 6 of power end, also can detect this between ground wire 10 and zero line 9 that loop is connected load end by the 1st Resistor-Capacitor Unit the 17, the 2nd rectification circuit 22.

In the present embodiment, circuits for triggering select for use the 1st triode the 20, the 3rd resistance 32 to form, and also can select for use by voltage comparator circuit, resistance, unidirectional breakover element and form.

Because present embodiment is compared with embodiment 1, it is different to be merely the detection loop that is located between ground wire 7 and the zero line 6, and remaining structure is formed all identical with embodiment 1 with circuit theory, repeats no more at this.

Embodiment 3

Referring to shown in Figure 4, present embodiment is compared with embodiment 2, and present embodiment has increased by the 1st diode 23, and has cancelled the 2nd rectification circuit 22 among the embodiment 2.

In the present embodiment; Form by an input and another input, the 2nd Resistor-Capacitor Unit 18 of the 1st diode the 23, the 1st Resistor-Capacitor Unit 17, photoelectrical coupler 19 and to detect the loop and be connected between the ground wire 7 and zero line 6 of power end; One end of the 1st diode 23 is connected with ground wire 7; The other end of the 1st diode 23 is connected with the 1st Resistor-Capacitor Unit 17 1 ends; The other end of the 1st Resistor-Capacitor Unit 17 is connected with an input of photoelectrical coupler 19, and another input of photoelectrical coupler 19 is connected with an end of the 2nd Resistor-Capacitor Unit 18, and the other end of the 2nd Resistor-Capacitor Unit 18 is connected with zero line 6.

In the present embodiment, the 1st Resistor-Capacitor Unit 17 is an electric capacity, also can adopt the assembly of electric capacity or resistance and electric capacity; The 2nd Resistor-Capacitor Unit 18 is a resistance, also can adopt the assembly of electric capacity or resistance and electric capacity.

In the present embodiment, the inside of photoelectrical coupler 19 is provided with the series connection of 2 light-emitting diodes and is connected between the input and another input of photoelectrical coupler 19.

In the present embodiment; Being connected between the ground wire 7 and zero line 6 of power end, also can detect this between ground wire 10 and zero line 9 that loop is connected load end by the 1st diode the 23, the 1st Resistor-Capacitor Unit 17, an input of photoelectrical coupler 19 and the detection loop that another input, the 2nd Resistor-Capacitor Unit 18 are in series.

Because present embodiment is compared with embodiment 2, it is different to be merely the detection loop that is located between ground wire 7 and the zero line 6, and remaining structure is formed all identical with embodiment 2 with circuit theory, repeats no more at this.

Embodiment 4

Referring to shown in Figure 5, present embodiment is compared with embodiment 1, has increased the 2nd diode the 24, the 4th resistance the 33, the 2nd voltage stabilizing didoe the 28, the 2nd controllable silicon 29 in the present embodiment, and has cancelled the amplifying circuit 14 among the embodiment 1.

In the present embodiment; Form by an input and another input, the 2nd Resistor-Capacitor Unit 18 of the 1st Resistor-Capacitor Unit 17, photoelectrical coupler 19 and to detect the loop and be connected between the ground wire 7 and zero line 6 of power end; One end of the 1st Resistor-Capacitor Unit 17 is connected with ground wire 7; The other end of the 1st Resistor-Capacitor Unit 17 is connected with an input of photoelectrical coupler 19; Another input of photoelectrical coupler 19 is connected with an end of the 2nd Resistor-Capacitor Unit 18, and the other end of the 2nd Resistor-Capacitor Unit 18 is connected with zero line 6, and an end of the 2nd diode 24 is connected with an end of photoelectrical coupler 19; The other end of the 2nd diode 24 is connected with the other end of photoelectrical coupler 19; The 4th resistance 33 1 ends are connected with the positive pole (+) of the 1st rectification circuit 12 outputs, and the 4th resistance 33 other ends are connected with the collector electrode of the 2nd voltage stabilizing didoe 28 negative poles, photoelectrical coupler 19 1 outputs, the 1st triode 20 respectively, and another output of photoelectrical coupler 19 is connected with the base stage of the 1st triode 20; The emitter of the 1st triode 20 is connected with the trigger electrode of the 2nd controllable silicon 29, and the anode of the 2nd controllable silicon 29 and negative electrode are connected in parallel with the 1st silicon controlled anode and negative electrode respectively.

In the present embodiment, the inside of photoelectrical coupler 19 is provided with 1 light-emitting diode, also can be provided with 2 to 4 light-emitting diode series connection and be connected between the input and another input of photoelectrical coupler 19 inside.

In the present embodiment, circuits for triggering select for use the 1st triode the 20, the 3rd resistance 32 to form, and are also optional with voltage comparator circuit, resistance, unidirectional breakover element composition.

Because present embodiment compares with embodiment 1, the drive circuit that is merely the detection loop that is located between ground wire 7 and the zero line 6 and solenoid 11 is different, and remaining structure composition is all identical with embodiment 1 with circuit theory, repeats no more at this.

Embodiment 5

Referring to shown in Figure 6; A kind of leakage protecting plug; Mainly by phase line 8 and zero line 9 and ground wire 10, zero sequence current mutual inductor 15, test loop 16, electromagnetic trip and the locker of the phase line 5 of shell and latch, power end and zero line 6 and ground wire 7, load end; This electromagnetic trip and locker comprise solenoid 11 and drive circuit, phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2, ground wire contact 3 and 4, spring, the push rod that resets, and the 1st Resistor-Capacitor Unit the 17, the 2nd Resistor-Capacitor Unit 18, photoelectrical coupler the 19, the 2nd rectification circuit the 22, the 3rd resistance the 32, the 5th resistance the 34, the 6th resistance 35, voltage comparator circuit the 36, the 4th diode 26 are formed.

In the present embodiment, voltage comparator circuit 36 is a voltage comparator, also can adopt operational amplifier.

In the present embodiment, unidirectional breakover element is the 4th diode 26, also can adopt triode.

In the present embodiment; Be connected between the ground wire 7 and zero line 6 of power end by the 1st Resistor-Capacitor Unit the 17, the 2nd rectification circuit 22, an input of photoelectrical coupler 19 and the detection loop that another input, the 2nd Resistor-Capacitor Unit 18 are in series; One end of said the 1st Resistor-Capacitor Unit 17 is connected with ground wire; The other end of the 1st Resistor-Capacitor Unit 17 is connected with an input of the 2nd rectification circuit 22; Another input of the 2nd rectification circuit 22 is connected with an end of the 2nd Resistor-Capacitor Unit 18; The other end of the 2nd Resistor-Capacitor Unit 18 is connected with zero line 6; One output of the 2nd rectification circuit 22 is connected with another input with an input of photoelectrical coupler 19 respectively with another output; One output of photoelectrical coupler 19 and the power end of amplifying circuit 14 (+VS) being connected, another output of photoelectrical coupler 19 is connected with the 3rd resistance 32 1 ends, voltage comparator circuit 36 1 inputs (+) respectively, and the other end of the 3rd resistance 32 is connected with the ground end (GND) of the 1st rectification circuit 12 negative pole of output end (-), amplifying circuit 14 respectively; The power end of one end amplifying circuit 14 of the 5th resistance 34 (+VS) other end of connection, the 5th resistance 34 is connected with an end of the 6th resistance 35; The other end of the 6th resistance 35 is connected with the ground end (GND) of amplifying circuit 14, and the other end of the 5th resistance 34 also is connected with another input (-) of voltage comparator circuit 36 with the tie point of an end of the 6th resistance 35, and the output of voltage comparator circuit 36 is connected with an end of the 4th diode 26; The 4th diode 26 other ends are connected with the trigger electrode of the 1st controllable silicon 13, and the anode of the 1st controllable silicon 13 is connected with negative pole (-) with the positive pole (+) of the 1st rectification circuit 12 outputs respectively with negative electrode.

In the present embodiment, the 1st Resistor-Capacitor Unit 17 is a resistance, and the 1st Resistor-Capacitor Unit 17 also can adopt the assembly of electric capacity or resistance and electric capacity; The 2nd Resistor-Capacitor Unit 18 is a resistance, and the 2nd Resistor-Capacitor Unit 18 also can adopt the assembly of electric capacity or resistance and electric capacity.

In the present embodiment; The inside of photoelectrical coupler 19 is provided with the light-emitting component of 1 light-emitting diode as photoelectrical coupler 19; Because the effect of the 2nd rectification circuit 22 makes no matter photoelectrical coupler 19 inner light-emitting diodes are when the positive half wave of signal; Still when the negative half-wave of signal, photoelectrical coupler 19 inner light-emitting diodes all can be luminous, thereby the photoelectricity transmission efficient, the sensitivity that have improved photoelectrical coupler 19 widely; In addition; Can also be through the sensitivity that between an input of photoelectrical coupler 19 and another input, improves photoelectrical coupler at 2 to 4 light-emitting diodes of internal series-connection of photoelectrical coupler 19, so that satisfy the electric current that detects on the loop when very faint, photoelectrical coupler 19 also can be exported signal and make the leakage protecting plug tripping operation.

In the present embodiment; Being connected between the ground wire 7 and zero line 6 of power end, also can detect this between ground wire 10 and zero line 9 that loop is connected load end by the 1st Resistor-Capacitor Unit the 17, the 2nd rectification circuit 22, an input of photoelectrical coupler 19 and the detection loop that another input, the 2nd Resistor-Capacitor Unit 18 are in series.

During use; Press the push rod that resets of leakage protecting plug; Phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2 and ground wire contact 3 and 4 are all normally connected; The phase line 8 of load end, zero line 9, ground wire 10 are connected with phase line 5, zero line 6, the ground wire 7 of power end respectively; Ground wire 7 and 10 is because the effect of ground connection is clamped at about zero volt voltage; Simultaneously zero line 6 and 9 also be zero lie prostrate about, the electric current that does not just have electric current to flow through or flow through by the 1st Resistor-Capacitor Unit the 17, the 2nd rectification circuit 22, photoelectrical coupler 19 1 inputs and detection loop that another input, the 2nd Resistor-Capacitor Unit 18 are formed that is connected like this between ground wire 7 and the zero line 6 of leakage protecting plug power end does not reach the threshold values (for example: 10 microamperes) that presets, the output of photoelectrical coupler 19 does not have signal to export to an input (+) of voltage comparator circuit 36; Because photoelectrical coupler 19 is exported to the signal voltage of an input (+) of voltage comparator circuit 36 less than by the 5th resistance 34 and the 6th resistance 35 dividing potential drops reference voltage to another input (-) of voltage comparator circuit 36; So voltage comparator circuit 36 outputs just are maintained low-voltage, the 4th diode 26 ends, and the 1st controllable silicon 13 ends; Leakage protecting plug just remains on the "on" position that resets like this, thereby for the power supply of the consuming device of its lower end with ground connection is provided.

When the ground protection system unusual (for example: phase, ground short circuit cause the ground wire accident charged) takes place when causing ground wire 7 and 10 accidents to be with dangerous voltage; The detection loop of being made up of the 1st Resistor-Capacitor Unit the 17, the 2nd rectification circuit 22, an input and another input, the 2nd Resistor-Capacitor Unit 18 of photoelectrical coupler 19 that is connected like this between ground wire 7 and the zero line 6 of power end just has an electric current to flow through; The lumination of light emitting diode of photoelectrical coupler 19 inside; Thereby exciting light electric coupling 19 makes it output signal to an input (+) of voltage comparator circuit 36; When this signal during greater than the reference voltage of another input (-) of giving voltage comparator circuit 36 by the 5th resistance 34 and the 6th resistance 35 dividing potential drops; Voltage comparator circuit 36 outputs become high voltage; 26 conductings of the 4th diode; The be triggered conducting and leakage protecting plug is threaded off of the 1st controllable silicon 13 just can in time all be broken off phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2, ground wire contact 3 and 4 before people touch consuming device, thereby ensured people's Electrical Safety better.

When the phase line 8 of load end, on the zero line 9 consuming device fault electric leakage and in the normal situation of ground protection system following time; Can produce a residual current through ground wire 10 and 7; Zero sequence current mutual inductor 15 can detect the residual current between phase, the zero line and export a signal and give amplifying circuit 14, and when residual current reached the threshold values (for example: 10 milliamperes) that presets, amplifying circuit 14 triggered output output signal; The 4th diode 26 oppositely ends; The conducting that is triggered of the 1st controllable silicon 13, leakage protecting plug is threaded off, and before people touch consuming device, just can in time all break off phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2, ground wire contact 3 and 4; And when the phase line 8 of load end, on the zero line 9 consuming device fault electric leakage and when not having ground connection (for example: the ground wire virtual connection causes no ground connection on the socket) in the ground protection system; Metal parts that consuming device exposes and leakage protecting plug ground wire 10 and 7 all can be with dangerous voltage; The detection loop of being made up of the 1st Resistor-Capacitor Unit the 17, the 2nd rectification circuit 22, an input and another input, the 2nd Resistor-Capacitor Unit 18 of photoelectrical coupler 19 that is connected between leakage protecting plug power end ground wire 7 and the zero line 6 just has an electric current to flow through; The lumination of light emitting diode of photoelectrical coupler 19 inside; Thereby exciting light electric coupling 19 makes it output signal to an input (+) of voltage comparator circuit 36; When this signal during greater than the reference voltage of another input (-) of giving voltage comparator circuit 36 by the 5th resistance 34 and the 6th resistance 35 dividing potential drops; Voltage comparator circuit 36 outputs become high voltage; 26 conductings of the 4th diode; The be triggered conducting and leakage protecting plug is threaded off of the 1st controllable silicon 13 just can in time all be broken off phase line contact 1-1 and 2-1, zero line contact 1-2 and 2-2, ground wire contact 3 and 4 before people touch consuming device, thereby ensured people's Electrical Safety better.

Embodiment 6

Referring to shown in Figure 7, present embodiment is compared with embodiment 5, has increased by the 2nd controllable silicon 29 in the drive circuit of the solenoid 11 of present embodiment, and has cancelled embodiment 5 described amplifying circuits 14; Increase the 4th resistance 33 and the 2nd voltage stabilizing didoe 28 in the circuits for triggering of present embodiment, and cancelled the 4th diode 26 described in the embodiment 5.

In the present embodiment; The drive circuit of solenoid 11 mainly is made up of the 1st rectification circuit the 12, the 1st controllable silicon the 13, the 2nd controllable silicon 29; One output of zero sequence current mutual inductor 15 is connected with negative electrode with the trigger electrode of the 1st controllable silicon 13 respectively with another output; The anode of the 1st controllable silicon 13 is connected with negative pole (-) with the positive pole (+) of the 1st rectification circuit 12 outputs respectively with negative electrode, and the anode of the 2nd controllable silicon 29 is connected with negative electrode with the anode of the 1st controllable silicon 13 respectively with negative electrode.

In the present embodiment; Form by an input and another input, the 2nd Resistor-Capacitor Unit 18 of the 1st Resistor-Capacitor Unit 17, photoelectrical coupler 19 and to detect the loop and be connected between the ground wire 7 and zero line 6 of power end; One end of the 1st Resistor-Capacitor Unit 17 is connected with ground wire 7; The other end of the 1st Resistor-Capacitor Unit 17 is connected with an input of photoelectrical coupler 19; Another input of photoelectrical coupler 19 is connected with an end of the 2nd Resistor-Capacitor Unit 18; The other end of the 2nd Resistor-Capacitor Unit 18 is connected with zero line 6; One end of the 2nd diode 24 is connected with an end of photoelectrical coupler 19, the other end of the 1st Resistor-Capacitor Unit 17 respectively; The other end of the 2nd diode 24 is connected with the other end of photoelectrical coupler 19, an end of the 2nd Resistor-Capacitor Unit 18 respectively, and the 4th resistance 33 1 ends are connected with the positive pole (+) of the 1st rectification circuit 12 outputs, and the other end of the 4th resistance 33 is connected with an output of the 2nd voltage stabilizing didoe 28 negative poles, the 5th resistance 34 1 ends, photoelectrical coupler 19 respectively; The 2nd voltage stabilizing didoe 28 positive poles are connected with the negative pole of output end (-) of the 1st rectification circuit 12; Another output of photoelectrical coupler 19 is connected with an input (+) of the 3rd resistance 32 1 ends, voltage comparator circuit 36 respectively, the 3rd resistance 32 other ends and 28 anodal connections of the 2nd voltage stabilizing didoe, and the 5th resistance 34 other ends are connected with another input (-) of the 6th resistance 35 1 ends, voltage comparator circuit 36 respectively; The 6th resistance 36 other ends and 28 anodal connections of the 2nd voltage stabilizing didoe, the output of voltage comparator circuit 36 is connected with the trigger electrode of the 2nd controllable silicon 29.

In the present embodiment, the inside of photoelectrical coupler 19 is provided with 1 light-emitting diode, also can be provided with 2 to 4 light-emitting diodes and be connected between the input and another input of photoelectrical coupler 19 with the mode of serial or parallel connection.

In the present embodiment, circuits for triggering select for use the 3rd resistance the 32, the 5th resistance the 34, the 6th resistance 35, voltage comparator circuit the 36, the 4th resistance the 33, the 2nd voltage stabilizing didoe 28 to form.

Because present embodiment compares with embodiment 5, the drive circuit that is merely the detection loop that is located between ground wire 7 and the zero line 6, solenoid 11 is different, and remaining structure composition is all identical with embodiment 5 with circuit theory, repeats no more at this.

Embodiment 7

Referring to shown in Figure 8, present embodiment is compared with embodiment 6, and present embodiment has increased the 1st resistance the 30, the 2nd resistance the 31, the 3rd diode the 25, the 1st voltage stabilizing didoe 27, and has cancelled embodiment 6 described the 4th resistance 33 and the 2nd voltage stabilizing didoes 28.

In the present embodiment; The drive circuit of solenoid 11 mainly is made up of the 1st rectification circuit the 12, the 1st controllable silicon the 13, the 1st resistance the 30, the 2nd resistance the 31, the 3rd diode the 25, the 1st voltage stabilizing didoe the 27, the 2nd controllable silicon 29; The 1st resistance 30 1 ends are connected with the output head anode (+) of the 1st rectification circuit 12; The 1st resistance 30 other ends are connected with the 2nd resistance 31 1 ends, the 1st voltage stabilizing didoe 27 negative poles respectively; The 2nd resistance 31 other ends and 25 anodal connections of the 3rd diode; The 3rd diode 25 negative poles are connected with negative pole of output end (-), the 1st voltage stabilizing didoe 27 positive poles of the 1st rectification circuit 12 respectively; One output of zero sequence current mutual inductor 15 is connected with trigger electrode, the 3rd diode 25 positive poles of the 1st controllable silicon 13 respectively with another output, and the anode of the 1st controllable silicon 13 is connected with negative pole (-) with the positive pole (+) of the 1st rectification circuit 12 outputs respectively with negative electrode, and the anode of the 2nd controllable silicon 29 is connected with negative electrode with the anode of the 1st controllable silicon 13 respectively with negative electrode.

In the present embodiment; Form by an input and another input, the 2nd Resistor-Capacitor Unit 18 of the 1st Resistor-Capacitor Unit 17, photoelectrical coupler 19 and to detect the loop and be connected between the ground wire 7 and zero line 6 of power end; One end of the 1st Resistor-Capacitor Unit 17 is connected with ground wire 7; The other end of the 1st Resistor-Capacitor Unit 17 is connected with an input of photoelectrical coupler 19; Another input of photoelectrical coupler 19 is connected with an end of the 2nd Resistor-Capacitor Unit 18; The other end of the 2nd Resistor-Capacitor Unit 18 is connected with zero line 6; One end of the 2nd diode 24 is connected with an end of photoelectrical coupler 19, the other end of the 1st Resistor-Capacitor Unit 17 respectively; The other end of the 2nd diode 24 is connected with the other end of photoelectrical coupler 19, an end of the 2nd Resistor-Capacitor Unit 18 respectively, and an output of photoelectrical coupler 19 is connected with the 1st voltage stabilizing didoe 27 negative poles, the 5th resistance 34 1 ends respectively, and another output of photoelectrical coupler 19 is connected with an input (+) of the 3rd resistance 32 1 ends, voltage comparator circuit 36 respectively; The 3rd resistance 32 other ends are connected with the negative pole of output end (-) of the 1st voltage stabilizing didoe 27 positive poles, the 1st rectification circuit 12 respectively; The 5th resistance 34 other ends are connected with the 6th resistance 35 1 ends, voltage comparator circuit 36 another inputs (-) respectively, and the 6th resistance 35 other ends are connected with the negative pole of output end (-) of the 1st voltage stabilizing didoe 27 positive poles, the 1st rectification circuit 12 respectively, and the output of voltage comparator circuit 36 is connected with the trigger electrode of the 2nd controllable silicon 29.

In the present embodiment, circuits for triggering select for use the 3rd resistance the 32, the 5th resistance the 34, the 6th resistance 35, voltage comparator circuit 36 to form.

Because present embodiment compares with embodiment 6, the drive circuit that is merely the detection loop that is located between ground wire 7 and the zero line 6, solenoid 11 is different, and remaining structure composition is all identical with embodiment 6 with circuit theory, repeats no more at this.

Embodiment 8

Referring to shown in Figure 9, present embodiment is compared with embodiment 5, and present embodiment has increased by the 2nd triode 21, and has cancelled embodiment 5 described the 4th diode 26 and the 2nd rectification circuits 22.

In the present embodiment; Form by an input and another input, the 2nd Resistor-Capacitor Unit 18 of the 1st Resistor-Capacitor Unit 17, photoelectrical coupler 19 and to detect the loop and be connected between the ground wire 7 and zero line 6 of power end; One end of the 1st Resistor-Capacitor Unit 17 is connected with ground wire 7; The other end of the 1st Resistor-Capacitor Unit 17 is connected with an input of photoelectrical coupler 19; Another input of photoelectrical coupler 19 is connected with an end of the 2nd Resistor-Capacitor Unit 18; The other end of the 2nd Resistor-Capacitor Unit 18 is connected with zero line 6; One output of photoelectrical coupler 19 respectively with the power end of amplifying circuit 14 (+VS), the collector electrode of the 5th resistance 34 1 ends, the 2nd triode 21 is connected, another output of photoelectrical coupler 19 is connected with an input (+) of the 3rd resistance 32 1 ends, voltage comparator circuit 36 respectively, the 3rd resistance 32 other ends are connected with the ground end (GND) of amplifying circuit 14, the negative pole of output end (-) of the 1st rectification circuit 12 respectively; The 5th resistance 34 other ends are connected with the 6th resistance 35 1 ends, voltage comparator circuit 36 another inputs (-) respectively; The 6th resistance 35 other ends are connected with the negative pole of output end (-) of the 1st rectification circuit 12, and the output of voltage comparator circuit 36 is connected with the base stage of the 2nd triode 21, and the emitter of the 2nd triode is connected with the trigger electrode of the 1st controllable silicon 13.

In the present embodiment, the inside of photoelectrical coupler 19 is provided with between the input and another input that 2 light-emitting diodes are connected in photoelectrical coupler 19 in parallel.

In the present embodiment, circuits for triggering select for use the 3rd resistance the 32, the 5th resistance the 34, the 6th resistance 35, voltage comparator circuit the 36, the 2nd triode 21 to form.

Because present embodiment compares with embodiment 5, be merely that to be located at the unidirectional breakover element that detects in loop, the circuits for triggering between ground wire 7 and the zero line 6 different, remaining structure composition is all identical with embodiment 5 with circuit theory, repeats no more at this.

Embodiment 9

Referring to shown in Figure 10, present embodiment is compared with embodiment 7, has increased by the 1st triode 20 in the present embodiment, and has cancelled the 5th resistance the 34, the 6th resistance 36 and the voltage comparator circuit 36 described in the embodiment 7.

In the present embodiment; Form by an input and another input, the 2nd Resistor-Capacitor Unit 18 of the 1st Resistor-Capacitor Unit 17, photoelectrical coupler 19 and to detect the loop and be connected between the ground wire 7 and zero line 6 of power end; One end of the 1st Resistor-Capacitor Unit 17 is connected with ground wire 7; The other end of the 1st Resistor-Capacitor Unit 17 is connected with an input of photoelectrical coupler 19; Another input of photoelectrical coupler 19 is connected with an end of the 2nd Resistor-Capacitor Unit 18; The other end of the 2nd Resistor-Capacitor Unit 18 is connected with zero line 6, and an end of the 2nd diode 24 is connected with an end of photoelectrical coupler 19, the other end of the 1st Resistor-Capacitor Unit 17 respectively, and the other end of the 2nd diode 24 is connected with the other end of photoelectrical coupler 19, an end of the 2nd Resistor-Capacitor Unit 18 respectively; One output of photoelectrical coupler 19, the 1st triode 20 collector electrodes are connected with the 1st voltage stabilizing didoe 27 negative poles respectively; Another output of photoelectrical coupler 19 is connected with the base stage of the 3rd resistance 32 1 ends, the 1st triode 20, and the 3rd resistance 32 other ends are connected with the negative pole of output end (-) of the 1st voltage stabilizing didoe 27 positive poles, the 1st rectification circuit 12 respectively, and the emitter of the 1st triode 20 is connected with the trigger electrode of the 2nd controllable silicon 29.

In the present embodiment, circuits for triggering select for use the 1st triode the 20, the 3rd resistance 32 to form.

Because present embodiment is compared with embodiment 7, it is different to be merely the circuits for triggering that are connected with photoelectrical coupler 19, and remaining structure is formed all identical with embodiment 7 with circuit theory, repeats no more at this.

Claims

1. leakage protecting plug; Include shell and latch, phase line, zero line, ground wire, zero sequence current mutual inductor, test loop, electromagnetic trip and locker; This electromagnetic trip and locker comprise solenoid and drive circuit thereof, contact; The drive circuit of said solenoid mainly is made up of the 1st rectification circuit, the 1st controllable silicon; One output of said zero sequence current mutual inductor secondary winding and another output are connected with another input with an input of the drive circuit of said solenoid respectively, it is characterized in that: also be provided with the 1st Resistor-Capacitor Unit, the 2nd Resistor-Capacitor Unit, photoelectrical coupler, circuits for triggering; Between said ground wire and zero line, be connected with the detection loop that an input and another input, said the 2nd Resistor-Capacitor Unit by said the 1st Resistor-Capacitor Unit, said photoelectrical coupler are in series; The signal of said photoelectrical coupler output is sent into the input of said circuits for triggering, and the output of said circuits for triggering is connected with the control end of the drive circuit of said solenoid.

2. leakage protecting plug according to claim 1 is characterized in that: in said detection loop, also be provided with the 2nd rectification circuit; Said the 1st Resistor-Capacitor Unit one end is connected with said ground wire, and the 1st Resistor-Capacitor Unit other end is connected with the 2nd rectification circuit one input, and another input of the 2nd rectification circuit is connected with the 2nd Resistor-Capacitor Unit one end, and the 2nd Resistor-Capacitor Unit other end is connected with said zero line; The 2nd rectification circuit one output is connected with another input with an input of said photoelectrical coupler respectively with another output.

3. leakage protecting plug according to claim 1 is characterized in that: in said detection loop, also be provided with the 1st diode; Said the 1st diode one end is connected with said ground wire; The 1st diode other end is connected with the 1st Resistor-Capacitor Unit one end; The 1st Resistor-Capacitor Unit other end is connected with an input of photoelectrical coupler; Another input of photoelectrical coupler is connected with the 2nd Resistor-Capacitor Unit one end, and the 2nd Resistor-Capacitor Unit other end is connected with said zero line.

4. leakage protecting plug according to claim 1; It is characterized in that: in said detection loop, also be provided with the 2nd diode; Said the 1st Resistor-Capacitor Unit other end is connected with said the 2nd diode one end with the tie point of an input of said photoelectrical coupler, and said the 2nd Resistor-Capacitor Unit one end is connected with said the 2nd diode other end with the tie point of another input of said photoelectrical coupler.

5. leakage protecting plug according to claim 1 is characterized in that: the said the 1st or the 2nd Resistor-Capacitor Unit is the assembly of resistance or electric capacity or resistance and electric capacity.

6. leakage protecting plug according to claim 1; It is characterized in that: in the drive circuit of said solenoid, also be provided with amplifying circuit; One input of the drive circuit of said solenoid and another input are respectively an input and another input of said amplifying circuit, and said amplifying circuit triggers the triggering signal of output output and sends into the 1st controllable silicon trigger electrode.

7. leakage protecting plug according to claim 1 is characterized in that: an input of the drive circuit of said solenoid and another input are respectively said the 1st silicon controlled trigger electrode and negative electrode.

8. leakage protecting plug according to claim 1; It is characterized in that: in the drive circuit of said solenoid, also be provided with the 1st resistance, the 2nd resistance, the 3rd diode, the 1st voltage stabilizing didoe; Said the 1st resistance one end is connected with said the 1st rectification circuit output end is anodal; The 1st resistance other end is connected with the 2nd resistance one end; The 2nd resistance other end is connected with the 3rd diode cathode, and the 3rd diode cathode is connected with said the 1st rectification circuit output end negative pole, and the 1st resistance other end is connected with the 1st voltage stabilizing didoe negative pole with the tie point of the 2nd resistance one end; The 1st voltage stabilizing didoe is anodal to be connected with the 1st rectification circuit output end negative pole, and an input of the drive circuit of said solenoid and another input are respectively said the 1st controllable silicon trigger electrode and said the 3rd diode cathode.

9. according to claim 1 or 6 described leakage protecting plugs, it is characterized in that: said circuits for triggering are made up of the 1st triode, the 3rd resistance; One output of said photoelectrical coupler is connected with the power end of said amplifying circuit, the collector electrode of said the 1st triode respectively; Another output of said photoelectrical coupler is connected with base stage, the 3rd resistance one end of said the 1st triode respectively; The 3rd resistance other end is connected with said amplifying circuit ground end, the 1st rectification circuit output end negative pole respectively, and the emitter of the 1st triode is connected with said the 1st silicon controlled trigger electrode.

10. according to claim 1 or 7 described leakage protecting plugs, it is characterized in that: in the drive circuit of said solenoid, also be provided with the 2nd controllable silicon; Its circuits for triggering are made up of the 1st triode, the 3rd resistance, the 4th resistance, the 2nd voltage stabilizing didoe; Said the 4th resistance one end is connected with the 1st rectification circuit output end is anodal; The 4th resistance other end is connected with the 2nd voltage stabilizing didoe negative pole; The 2nd voltage stabilizing didoe is anodal to be connected with said the 1st rectification circuit output end negative pole; One output of said photoelectrical coupler is connected with the collector electrode of said the 2nd voltage stabilizing didoe negative pole, the 1st triode respectively; Another output of said photoelectrical coupler is connected with base stage, the 3rd resistance one end of said the 1st triode respectively; The 3rd resistance other end is anodal with the 2nd voltage stabilizing didoe respectively, the 1st rectification circuit output end negative pole is connected, and the emitter of said the 1st triode is connected with the 2nd controllable silicon trigger electrode, and the 2nd silicon controlled anode and negative electrode are connected in parallel with the 1st silicon controlled anode and negative electrode respectively.

11. according to claim 1 or 8 described leakage protecting plugs, it is characterized in that: in the drive circuit of said solenoid, also be provided with the 2nd controllable silicon, its circuits for triggering are made up of the 1st triode, the 3rd resistance; One output of said photoelectrical coupler is connected with said the 1st voltage stabilizing didoe negative pole; Another output of said photoelectrical coupler is connected with base stage, the 3rd resistance one end of said the 1st triode respectively; The 3rd resistance other end is connected with the 1st voltage stabilizing didoe is anodal; The collector electrode of the 1st triode is connected with the 1st voltage stabilizing didoe negative pole; The emitter of said the 1st triode is connected with the 2nd controllable silicon trigger electrode, and the 2nd silicon controlled anode and negative electrode are connected in parallel with the 1st silicon controlled anode and negative electrode respectively.

12. according to claim 1 or 6 described leakage protecting plugs, it is characterized in that: said circuits for triggering are made up of the 3rd resistance, the 5th resistance, the 6th resistance, voltage comparator circuit, unidirectional breakover element; One output of said photoelectrical coupler is connected with the power end of said amplifying circuit; Another output of photoelectrical coupler is connected with an input of the 3rd resistance one end, voltage comparator circuit respectively; The 3rd resistance other end is connected with the ground end of amplifying circuit; Said the 5th resistance one end is connected with the power end of said amplifying circuit, and the 5th resistance other end is connected with the 6th resistance one end, and the 6th resistance other end is connected with the ground end of said amplifying circuit; The 5th resistance other end is connected with another input of voltage comparator circuit with the tie point of the 6th resistance one end, and the voltage comparator circuit output is connected with said the 1st silicon controlled trigger electrode through unidirectional breakover element.

13. according to claim 1 or 7 described leakage protecting plugs; It is characterized in that: in the drive circuit of said solenoid, also be provided with the 2nd controllable silicon, its circuits for triggering are made up of the 3rd resistance, the 5th resistance, the 6th resistance, voltage comparator circuit, the 4th resistance, the 2nd voltage stabilizing didoe; Said the 4th resistance one end is connected with the 1st rectification circuit output end is anodal; The 4th resistance other end is connected with the 2nd voltage stabilizing didoe negative pole; The 2nd voltage stabilizing didoe is anodal to be connected with said the 1st rectification circuit output end negative pole; One output of said photoelectrical coupler is connected with said the 2nd voltage stabilizing didoe negative pole; Another output of photoelectrical coupler is connected with an input of the 3rd resistance one end, voltage comparator circuit respectively, and the 3rd resistance other end is connected with the 2nd voltage stabilizing didoe is anodal, and said the 5th resistance one end is connected with said the 2nd voltage stabilizing didoe negative pole; The 5th resistance other end is connected with the 6th resistance one end; The 6th resistance other end is connected with said the 2nd voltage stabilizing didoe is anodal, and the 5th resistance other end is connected with another input of voltage comparator circuit with the tie point of the 6th resistance one end, and the voltage comparator circuit output is connected with the 2nd silicon controlled trigger electrode.

14. according to claim 1 or 8 described leakage protecting plugs, it is characterized in that: in the drive circuit of said solenoid, also be provided with the 2nd controllable silicon, its circuits for triggering are made up of the 3rd resistance, the 5th resistance, the 6th resistance, voltage comparator circuit; One output of said photoelectrical coupler is connected with said the 1st voltage stabilizing didoe negative pole; Another output of photoelectrical coupler is connected with an input of the 3rd resistance one end, voltage comparator circuit respectively; The 3rd resistance other end is connected with the 1st voltage stabilizing didoe is anodal; Said the 5th resistance one end is connected with said the 1st voltage stabilizing didoe negative pole, and the 5th resistance other end is connected with the 6th resistance one end, and the 6th resistance other end is connected with said the 1st voltage stabilizing didoe is anodal; The 5th resistance other end is connected with another input of voltage comparator circuit with the tie point of the 6th resistance one end, and the voltage comparator circuit output is connected with the 2nd silicon controlled trigger electrode.

15. according to claim 12 or 13 or 14 described leakage protecting plugs, it is characterized in that: said voltage comparator circuit is selected voltage comparator exclusive disjunction amplifier for use.

16. leakage protecting plug according to claim 12 is characterized in that: said unidirectional breakover element is the 4th diode.

17. leakage protecting plug according to claim 12 is characterized in that: said unidirectional breakover element is the 2nd triode.

18. leakage protecting plug according to claim 1; It is characterized in that: be provided with 1 light-emitting diode at least in the inside of said photoelectrical coupler, described at least 1 light-emitting diode series connection is connected between the input and another input of said photoelectrical coupler.

19. leakage protecting plug according to claim 1; It is characterized in that: be provided with 2 to 4 light-emitting diodes in the inside of said photoelectrical coupler, said 2 to 4 light-emitting diodes are connected between the input and another input of said photoelectrical coupler with parallel connection or series system.