JP2010091581A5 - - Google Patents

Description

Apparatus for measuring leakage current state and method for measuring leakage current state.

In a simple configuration, to a method of measuring the leakage current status of the low-pressure electrical equipment which a series of measuring process can include a device and a preliminary study to measure the leakage current status of the low-pressure electric equipment capable leakage current measurement.

For example, in the “Detailed Regulations for Handling Ministerial Regulations that Establish Technical Standards for Electrical Appliances in the Electrical Appliance and Material Safety Law” and “IEC 60335-1: 1994 International Standards”, two ACs connected to electrical appliances (measurement objects) It is instructed to measure the leakage current between any one of the power lines (hereinafter also referred to as “power lines”) and the exterior (exposed charging portion) of the electrical appliance.
There is a leakage current measuring device capable of measuring this type of leakage current (see, for example, Patent Document 1) . Further, a leakage ammeter and device are disclosed (for example, see Patent Document 2) .

Japanese Patent Laid-Open No. 10-246645 JP 2004-138565 A

However, grounded at feeding electric side transformer (61) and the transformer secondary winding (62) and a ground line for grounding the neutral line side (63) to ground (64), path of the load-side ground terminal In (65), there is a conflict between the improvement of service and cost reduction (efficiency) compared to the low-voltage power supply supplied by the TT grounding low-voltage distribution line equipment that grounds the ground with the grounding wire (68). Although there is currently a requirement, there is no device for measuring the leakage current state of low-voltage electrical equipment, and it is inefficient due to the reliance on human work such as supply management staff and electrical workers, and the main trunk due to extension regulations is leaked. from customers (customer), which established the panelboard and switchboard was a breaker, in actuated by leakage ground fault open (power failure) state, to the rapid power failure recovery request, or the like is the current supply management personnel and electrical work's It is a service that supports insulation measuring devices used for maintenance work.

In addition, the short circuit leakage (short circuit between the ground line G and the power line L) caused by the switch operation of the device by the customer does not hold the switch of the device, but the device leakage (grounding) the leakage) state between the lines G and the neutral phase line N, so the trunk circuit breaker does not detect (known art), in the service supply management staff and electrical work and others correspond with the breaker operation door to door, the return operation May be overlooked if done.

In addition, devices that measure the leakage current state of low-voltage electrical equipment using the current of insulation measuring devices used for maintenance work are well known, but insulation measuring devices used for maintenance work (notice as a precaution) Insulation measurement equipment used for maintenance work described in the instruction manual (when used in preparation will damage information equipment and household electrical appliances), it is indispensable to take care not to insert its own Megger voltage directly into the measurement object. However, there is a problem that it is practically difficult in terms of configuration . Therefore, there is a need for a fixing device that performs a series of measurement operations including preliminary investigations.

The present invention, the use of the insulation measuring device or the like used in conservation work without a series of measurement tasks can include a preliminary survey by using the measured object, the main and the distribution line path and the low-voltage electrical equipment the ground very line leakage a main object to provide a method of measuring devices and leakage current conditions to measure the current state.
Thus to solve the above problems, the configuration is very simple and voltage limiting device comprising a low cost (hereinafter, trans referred less voltage limiting device) at mainly the ground electrode wire was a distribution line path, for example, the It is possible to realize a device that detects the tracking state when water enters the outlets and plugs connected to the distribution line .

The feature of the present invention is an apparatus for measuring a leakage current state of a distribution line main circuit and a low voltage electric facility mainly including a grounding electrode that supplies electricity from a high voltage distribution line via a pole transformer. , the use of the insulation measuring device or the like used in conservation work without a series of measurement work can include a main and to an apparatus for measuring the leakage current state of the low-voltage electrical equipment of distribution line path was and preliminary survey the ground poles line, ground poles This is a method of measuring the leakage current state of low-voltage electrical equipment in the distribution line mainly consisting of wires, and consists of a grounding pole wire of a distribution board with a leakage indication function or a grounding pole wire placed on an outdoor watt hour meter a leakage current measuring device, wherein the earth leakage display function distribution board, by incorporating the distribution line electrical path configuration was a transformerless voltage limiting device becomes very simple and low-cost main ground electrode wire, put to the distribution line path that was the main ground electrode line The aging of such connection devices of the owner registered in leakage state and owner form of a low-pressure electrical equipment, measured at the earth electrode lines disposed in the outdoor power meter, the owner measurement results as a certificate will it be realized to be provided to the owner registered in the vote.

In addition , as relevant information of the Ministry of Economy, Trade and Industry , the owner registered on the owner's card is a system established in accordance with the revision of the Consumer Product Safety Act .
Starting from April 1, 2009 , the “Long-Term Use Product Safety Checking System” is used to prevent accidents and to use them safely for a long time . When products become old, parts will deteriorate (aging over time), resulting in fire and death. There is a risk of it happening .
In the “Long-term Product Safety Check System”, registering the owner with the manufacturer will receive a check notice at an appropriate time .
If you currently purchase the following products (specified maintenance products) , register the owner with the manufacturer .
Target product (specific maintenance product) Electricity is a built-in electric dishwasher: electric dryer for bathroom . Oil is an oil water heater: oil bath pot: FF oil hot air heater . Gas is indoor gas instantaneous water heater (for city gas / propane gas): indoor gas bath (for city gas / propane gas) .
Note From April 1, 2009, you can also inspect the products you are currently using . For details, ask the manufacturer . ( Products manufactured and imported prior to April 1, 2009 ) Ministry of Economy, Trade and Industry

The leakage display function distribution board, construction by incorporating a transformerless voltage limiting device and distribution line path whose main ground electrode lines become very simple and inexpensive, distribution lines whose main ground electrode wire the aging of the connected equipment such as the owner registered in leakage state and owner form of a low-pressure electrical equipment in path, measured by the ground electrode lines disposed outdoors energy meter, the own measurement results as a certificate an object of the present invention is to provide to the owner registered in Sha vote.

The apparatus for measuring the leakage current state of the low-voltage electrical equipment according to claim 1 includes the power supply side transformer (61), the secondary winding (62) of the transformer, and the neutral wire side (63) on the ground. In the TT grounding distribution circuit, which is grounded with the grounding wire (64) grounded to the ground and grounded with the grounding wire (68) at the load side grounding terminal (65) of the circuit, and the load side circuit and the grounded outlet of the main and the distribution line path to ground electrode wire (35), wherein also leakage display function distribution board ground electrode wire composed of a ground electrode lines arranged in WHM The leakage current measuring device is configured.

The leakage current state between the ground wire G and the neutral phase wire N (the branch leakage breaker is not detected) connected to the load side circuit of the distribution line circuit mainly including the distribution panel with the leakage display function and the grounding electrode wire In the measuring apparatus, the manual voice guidance operation button (16) opens the main breaker (3) of the distribution board with the leakage display function by the operation panel release switch (19), and the manual voice guidance operation button (17). the primary feed circuit (1) the neutral phase N-side switch (8) and the voltage L side change-over switch (11) is open, the discharge switch manually voice guidance operation button (15) (14) the medium in the on and open Measuring means for discharging the charge of the sex phase trunk line E3;

When the manual voice guidance operation button (18) is turned on, the voltage L side changeover switch (11) is turned on to apply a transformerless voltage limit to the neutral phase main line E3, the circuit display means (5) is lit, and the load Leakage current measuring means between the ground line G and the neutral phase line N connected to the side circuit and between the ground line G and the power supply line L, the circuit display means (5), and the earth leakage current measuring means with the ground electrode (68) charging function power supply of a connected memory means and the measurement result to the announcement means and the primary feed circuit (1) and (13), equipped with a ground fault in the low-pressure electric equipment definitive distribution line path whose main ground electrode wire A device that measures the current state.

The method for measuring the leakage current state of the low-voltage electrical equipment according to claim 2 opens the branch leakage breaker (4) in which the circuit display means (5) is lit by the manual voice guidance operation button (20). The results of the leakage current measuring device between the ground line G and the neutral phase line N and between the ground line G and the power line L connected to the load side circuit are transferred to the owner and the manufacturer registered in the owner's slip. This is a method for measuring the leakage current state of the low-voltage electrical equipment of the distribution line mainly composed of grounding poles . Therefore , it can be used as a fixing device that performs a series of measurement operations including preliminary investigations. .

A distribution board (main trunk / earth leakage breaker) is currently installed in the house against guerrilla-type heavy rains that frequently occur at present.For example , electrical equipment is damaged by flooding on the floor , and the main earth leakage breaker is activated . As a countermeasure, the circuit breaker that operates the branch breaker and activates the main earth leakage breaker is detected and shut off after flowing for 0.1 seconds in the branch circuit . There is a risk of three-person injury . Device for measuring the leakage current status of the present low pressure electrical equipment, so we have a primary feed circuit (1), without the entire circuit expires, the accident portion in the circuit inspection, the third party injury turned The danger has the effect of being avoided .

In addition , the main earth leakage breaker for earthquake countermeasures, which becomes a protection section due to a ground fault in the high voltage distribution line due to the earthquake, and shuts off by restarting power transmission after the ground fault has been resolved , will be detected and shut off after 0.1 seconds flow in the branch circuit , There is a risk of simultaneous occurrence after the earthquake . To measure the leakage current state of the present low pressure electrical equipment device, since the main breaker in the magnitude 5 will not have a primary feed circuit to cut off DC, in the branch circuit resume power transmission after the earthquake, the risk of terrorist Sex has the effect of being avoided .

In the absence and home after the earthquake, the primary feed circuit that has a seismic intensity of over 5 and the main breaker DC cuts off, the transformerless voltage limiter and the grounding pole that make the configuration very simple and low cost. By using the method of measuring the leakage state of the distribution line circuit and the low-voltage electrical equipment and the aging deterioration of the connected equipment, there is an effect of avoiding the risk of inadvertently putting it into the accident circuit by the customer .

Features with the present invention is a device for measuring the leakage current status of the low-pressure electric equipment in distribution line path whose main ground electrode wire that supplies electric household through a pole transformer from the high-pressure distribution line , the use of the insulation measuring device or the like used in conservation work without a series of measurement work can include a main and to an apparatus for measuring the leakage current state of the low-voltage electrical equipment of distribution line path was and preliminary survey the ground poles line, ground poles This is a method of measuring the leakage current state of low-voltage electrical equipment in the distribution line mainly consisting of wires, and consists of a grounding pole wire of a distribution board with a leakage indication function or a grounding pole wire placed on an outdoor watt hour meter a leakage current measuring device, wherein the earth leakage display function distribution board, by incorporating the distribution line electrical path configuration was a transformerless voltage limiting device becomes very simple and low-cost main ground electrode wire, distribution line path that was the main ground electrode line Definitive aged deterioration such as low-pressure electrical equipment leakage state and the owner of the connection component assigned owner form, measured by the outdoor arranged earth electrode wire to the power meter, the own measurement results as a certificate it can be carried out to provide the owner registered in Sha vote.

Circuit diagram using dummy measurement object X1N etc. after construction Circuit diagram using dummy measurement object X2L etc. after construction

Then , the person in charge of the supply office area confirmed and instructed the wiring diagram `` Fig. 1 as a reference '' that incorporates a device that measures the leakage current state of the low-voltage electrical equipment in the distribution line, mainly the grounding electrode , Service for the low-voltage power supply supplied by the TT grounding low-voltage distribution line equipment by confirming the submission of the circuit diagram and inspection data using the dummy measurement object after construction. Although conflicting issues improvements and reduced costs (efficiency) is required, to issue a certificate for damage after use for accidents related to the circuit, such as owners vote registration of the device or tracking owned by the customer This makes it easier to provide supply management services .

Referring to the circuit diagram using the “dummy measurement object” after construction (Fig. 1 as a reference), a distribution board mainly composed of a transformer-less voltage limiter and a grounding pole is installed on a distribution board with a leakage display function. Measure the deterioration of the low-voltage electrical equipment in the electric circuit and the aging of the connected equipment of the owner registered on the owner 's card with the grounding electrode wire placed on the outdoor watt-hour meter, and the measurement result as a certificate providing the owner registered owner form, a description will be given of a preferred embodiment.

The apparatus for measuring the leakage current state of the low-voltage electrical equipment according to claim 1 includes the power supply side transformer (61), the secondary winding (62) of the transformer, and the neutral wire side (63) on the ground. grounding the ground wire for grounding (64), in the distribution path of the TT grounding scheme employing a grounded ground line to ground even in the path of the load-side ground terminal (65) (68), a leakage display function distribution board It consists of the load side circuit of the distribution line mainly consisting of the grounding electrode and the outlet with grounding electrode (35) and the earthing wire of the distribution board with the earth leakage display function or the grounding electrode arranged on the watt hour meter. It consists of a leakage current measuring device.

The method of measuring the leakage current status of the low-pressure electrical equipment according to claim 2, wherein the manual said circuit display means in voice guidance operation button (20) (5) is opened and the branch circuit breaker (4) lit The results of the leakage current measuring device between the ground line G and the neutral phase line N and between the ground line G and the power line L connected to the load side circuit are transferred to the owner and the manufacturer registered in the owner's slip. Provided is a method for measuring the leakage current state of the low-voltage electrical equipment in the distribution line mainly composed of grounding poles , and therefore can be a fixing device that performs a series of measurement operations including a preliminary investigation. .

Incidentally, leakage current measurement method between the ground line G and the neutral phase line N, as shown in the circuit diagram (first view as a reference), measuring cable probe each tip is connected, 14a, 14b, 14c, the switch 15s, the measured object X1N measurement resistor 16n, leakage current measurement method between ground wire G and the power supply line L, as shown in the circuit diagram of a (reference Figure 2), each of tip measuring cable the probe is connected, 24a, it is 24b, 24c, the switch 25s, a measured object X2L measurement resistor 26l, configured to allow measuring the leakage current with the measured object It is .

Note that the leakage current measuring device between the ground line G and the neutral phase line N and between the ground line G and the power supply line L includes, for example, a plurality of measurement objects X1N and measurement objects X2L, and a plurality of branch leakage breakers (4 , 24) and the circuit display means (5,25), and a plurality of relays for switching these connection state of each element, by each relay is turned on / off controlled by the control unit, transformerless voltage As the application means to be applied by the limiting device, the circuit display means of the branch switch connected to the neutral phase trunk line E3 is lit, and between the ground line G and the neutral phase line N and the ground line G connected to the load side circuit. Current measuring means, circuit display means, and earthing current measuring means, memory means, and a measurement result announcement means,

The branch leakage breaker whose circuit display means is lit is opened by the manual voice guidance operation button, and the electric power between the ground line G and the neutral phase line N and between the ground line G and the power line L connected to the load side circuit is opened. The result of the current measurement means is a series of measurement operations provided to the owner and the manufacturer who registered with the owner slip.

The operation method will be described with reference to a circuit diagram (FIG. 1 for reference) using a “dummy measurement object” after construction in an apparatus for measuring a leakage current state of a low-voltage electrical facility.

The method for measuring the leakage current between the power line L side , the N side, the ground line side G, and between the ground line G and the neutral phase line N is the tip of each branch breaker circuit in FIG. As a measuring object X1N to which probes are respectively connected, and a method for measuring a leakage current between the ground line G and the power line L (see FIG. 2 for reference) , a tip portion is provided at the tip portion of each branch breaker circuit. Are installed as measurement objects X2L to which probes are respectively connected, and leakage currents of the measurement objects X1N and X2L are measured.

Next, the manual voice guidance operation button (16) of the control unit opens the main breaker (3) of the distribution board with the leakage display function by the operation panel release switch (19), and the manual voice guidance operation button (17 ), The neutral phase N-side switch (8) and the voltage L-side selector switch (11) of the primary feed circuit (1) are opened and a transformerless voltage limiting device connected to the voltage L-side selector switch (11). Connected to the load side neutral phase main line E3 of the open main breaker (3) as an application means for applying, and the load side ground terminal (67) and the discharge switch (14) of the electric circuit are connected to the load side neutral phase main line Measuring means for connecting to E3 and discharging the neutral phase main line E3 by turning on and opening the discharge switch (14) with the manual voice guidance operation button (15);

The manual voice guidance operation button (18) causes the voltage L side changeover switch (11) to be applied to the load-side neutral phase main line E3 and to apply a transformerless voltage limit to the neutral phase main line E3. The display means (5) is lit and the leakage current measuring means, the circuit display means (5) and the ground between the ground line G and the neutral phase line N and between the ground line G and the power line L connected to the load side circuit are connected. A measuring means comprising a leakage current measuring means, a memory means, and an announcement means and a power supply device (13) with a charging function connected to the primary feed circuit (1) via a polar wire (68);

The branch leakage breaker (4) whose circuit display means (5) is lit is opened by the manual voice guidance operation button (20), and between the ground line G and the neutral phase line N connected to the load side circuit and to the ground. The result of the leakage current measuring means between the line G and the power line L is provided to the owner and the manufacturer registered in the owner's slip, and therefore , it should be a fixed device that performs a series of measurement operations including a preliminary survey. I can do it .

Note that the power supply with charging function (13, 33 ) described in FIG. 1 (for reference ) uses a single-phase, three-wire power supply as follows: “The current or voltage of each part of the circuit including multiple power supplies is one for each power supply. Theorem that the current or voltage obtained on the assumption that it exists independently is equal to the superposition of this, this theorem is limited to the case where the power supply is a sine wave in the circuit composed of R, L and C R and L and C supply of the power supply device with charging function (13, 33) that is generally established (also referred to as superposition), the power supply device with charging function (13, 33) by superposition of AC sine wave 33) and the primary feed circuit (1, 21) is maintained in an alternating sine wave supply.

Also, the application means for applying the transformerless voltage limit described in FIG. 1 (for reference ) includes a transformerless voltage limiter (9) connected to the load voltage L side of the primary feed circuit (1, 21), and a display. Constructed by means of LED (10) `` AC upside LED connected in parallel with protective fuse, AC downside LED and AC going in one direction, unidirectional alternating current flows from anode to cathode of neon lamp connected in series, cathode side glows The manual voice guidance operation button (18) is formed by lighting, and the deformation of the AC waveform is lit at AC 70V, and the transformerless voltage limit is set so that the AC upside + 35V and the AC downside -35V are in one direction of AC. The voltage L side changeover switch (11) is turned on to the load side neutral phase main line E3 to serve as an application means for applying a transformerless voltage limit , the circuit display means is lit, and the ground line G connected to the load side circuit And between neutral phase line N and between ground line G and power line L A leakage current measuring means, a circuit display means, a grounding electrode, a leakage current measuring means, a memory means, an announcement means, and a power supply device with a charging function (13) connected to the primary feed circuit (1). And it was set as the structure which operate | moves together.

Note that the applying means for applying a transformerless voltage limitation in the described, across the load connected to the ground line side circuit G and the neutral phase line N and between the ground line G and the power supply line L (FIG. 1 by reference) The circuit check means in the manual voice guidance operation button has the theorem that “the free electrons in the electric wire are only the carriers that carry the electric charge” and the application means that applies the transformerless voltage limit is that the current flowing through the circuit is always “ There is a `` going '' and `` returning '' current, the current reaches the load instantly and returns, so a detector (ZCT load side circuit display) is provided in the middle, and the `` going '' and `` returning '' current passing there measure, at theorem finding the difference, and applying means for applying a transformerless voltage limiting neutral phase mains E3, circuit display means lights, connected to a ground line G and the neutral phase line to the load side circuit Between N and between ground line G and power line L A leakage current measuring means and a circuit display means and leakage current measuring means and the charging function power supply of a connected memory means and the measurement result to the announcement means and the primary feed circuit ground electrode lines definitive, it includes a.

The manual voice guidance the circuit display unit lighted branch circuit breaker in the operation button is released, in the inter-load side circuit connected to a ground line G and the neutral phase line N and between the ground line G and the power supply line L, ground the main and the owner registered in leakage state and owner vote distribution line path and the low-voltage electrical equipment aged deterioration such as connected device the polar, measured at the earth electrode lines disposed outdoors energy meter, the measurement result to the owner form owner registered in the certificate issuance effect.

Features of the present invention, a manual voice guidance opens the branch circuit breaker of the circuit display means illuminated by the operation button, the branch circuit breaker of the distribution line path and a low-pressure electrical equipment connected to a ground electrode lines on the load side circuit as a main The person in charge at the supply-side sales office measured the electrical leakage status and the aging of the connected equipment of the owner registered on the owner 's slip with a measuring instrument using the grounding electrode placed on the outdoor watt hour meter. Is provided as a certificate to the owner registered on the owner's card .
As supply management business of supply company sales offices, to provide a certificate of the measurement result to the owner registered in the owner's vote, such as the owner vote registration of the owner or manufacturer is, leakage current ( (Including deterioration over time) .

The person in charge at the local sales office confirms and gives guidance to the wiring diagram incorporating the above equipment (Fig. 1 for reference), and submits the circuit diagram and inspection data using the dummy measurement object after construction. sales office personnel to grant confirmation and customer number, said by entering the customer number in the navigation system, the owner of vote registration owned by the consumer equipment or tracking, etc., connected to the load-side circuit has been ground very A measurement certificate that uses a measuring instrument with a grounding electrode placed on an outdoor watt hour meter and gives a customer number for damage after use for accidents involving distribution lines, mainly wires. issue, along with the supply management business in the map software using the customer number is easy to carry out, and communication systems, such as power line communication or PHS to supply company owned, the Internet business was the main customer number can .

61 Power supply side transformer 62 Transformer secondary side winding 63 Neutral wire side 64 Neutral wire side ground wire 65 Lead-in wire 66 Electric energy meter 67 Load side ground terminal 68 of load path Ground wire 1 Primary feed circuit 21 Primary feed circuit 3 Main breaker 4 Branch leakage breaker 5 Circuit display means 24 Branch leakage breaker 25 Circuit display means 6 Other branch breaker 26 Other branch breaker 8 Primary feed circuit neutral phase N-side switch 28 Primary feed circuit Neutral phase N switch 9 Transformer voltage limiter 29 connected to voltage L side Transformer voltage limiter 10 connected to voltage L side Display LED
30 Indicator LED
11 L side changeover switch 31 L side changeover switch E3 Load neutral phase main line 12 Load L side main line 32 Load L side main line 13 Always supply circuit 33 of power supply with charging function 33 Always supply circuit 35 of power supply with charging function With ground electrode Outlet 351 Power line side L
352 Neutral phase wire side N
353 Grounding wire side G
354 Outlet connected to the primary feed load side 355 Outlet connected to the load side of the branch leakage breaker 356 Manual cutoff device 357 Automatic cutoff device 14 Discharge switch 15 Operation button 16 Operation button 17 Operation button 18 Operation button 19 Operation panel release switch 20 operation buttons
Short circuit 1 dummy measurement object X1N
Short circuit 2 dummy measurement object X2L

Claims (2)

Distribution panel with earth leakage display function and distribution line circuit mainly consisting of earthing poles, load side circuit and outlet with earthing electrode, and earthing arranged on earthing pole or electricity meter of distribution board with earth leakage indication function An earth leakage current measuring device constituted by a polar wire, wherein the ground wire G and the neutral phase wire N are connected to a load side circuit of a distribution line electrical circuit mainly composed of the distribution board with the earth leakage display function and the ground electrode wire. In the earth leakage current measuring means during the interval (the branch earth leakage breaker is not detected), the manual voice guidance operation button (16) opens the main breaker (3) of the distribution board with the earth leakage display function with the operation panel opening switch (19). The manual voice guidance operation button (17) opens the primary feed circuit (1), the neutral phase N side switch (8) and the voltage L side switch (11), and the manual voice guidance operation button (15) charging the discharge switch (14) neutral phase mains E3 in on and open to the discharge, the hand Voltage L side changeover switch voice guidance operation buttons (18) (11) was charged, and applying means for applying a clamping voltage and limit current to the neutral phase mains E3, circuit display means (5) is illuminated, the Circuit display means (5) between the ground line G and the neutral phase line N connected to the load side circuit and between the ground line G and the power supply line L, and the earth leakage current measuring means, the memory means, and the measurement result are announced on the grounding electrode line. measuring means, the current leakage state of low piezoelectric equipment that put the distribution line path whose main ground electrode wire, characterized by comprising a charging function power supply connected to the primary feed circuit apparatus.
Before SL manual voice guidance operation button (20), the circuit display opens the way lighting display branch circuit breaker (5) (4), connected to the ground line G and the neutral phase line to the load side circuit the results of leakage current measurement means between N and between the ground line G and the power supply line L, the distribution line with the primary ground electrode lines are provided to the owner and manufacturer registered, characterized in Rukoto owner votes a method for measuring the leakage current state of low piezoelectricity equipment that put the path.

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