JP2010091581A - Device for measuring leakage current state of low-voltage electrical facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for measuring the leakage current state of a low-voltage electrical facility, without having to use insulation measuring device which is used for maintenance work. <P>SOLUTION: A load side circuit of a panel board having a leakage display function is broken, a leakage current measuring means is disposed in between a ground line G, connected to the load side circuit and a neutral phase wire N (a branch leakage breaker does not detect leakage), and includes a series of measurement working means. In the measurement working means, a manual voice guidance operation button makes a voltage L side change switch be an applying means for applying restricted voltage and restricted current to a trunk E3 by introduction; a circuit displaying means lights up; the branch leakage breaker is opened, in response to the manual voice guidance operation button when the circuit displaying means lights up; and the results of the leakage current measuring device in between the ground line G connected to the load side circuit and the neutral phase wire N and between the ground line G and a power supply line L are provided to the owner who is registered with owner form and to the manufacturer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to an apparatus for measuring a leakage current state of a low-voltage electric facility without using an insulation measuring apparatus or the like used for maintenance work.

For example, in the “Detailed Regulations for Handling Ministerial Regulations for Establishing Technical Standards for Electrical Appliances in the Electrical Appliance and Material Safety Law” and “International Standards of IEC 60335-1: 1994”, two ACs connected to electrical appliances (measuring 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. As a leakage current measuring device capable of measuring this type of leakage current, Japanese Patent Application Laid-Open No. 2004-138565 and Japanese Patent Application Laid-Open No. 10-24645 disclose a leakage current meter (1).

JP-A-10-246645 (page 4-6) JP-A-2004-138565 (page 4-7)

However, the power supply side transformer (61), the secondary winding (62) of the transformer, and the neutral line side (63) are grounded by the ground line (64) grounded to the ground, and the load side ground terminal ( 65) also requires conflicting issues of service improvement and cost reduction (efficiency) for the low-voltage power supply supplied by the TT grounding low-voltage distribution line equipment that grounds the ground with the ground wire (68). However, there is currently no device for measuring the leakage current status of low-voltage electrical equipment, which is inefficient due to the reliance on human work such as supply management staff and electrician, and the main trunk according to the extension regulations In response to a quick power failure recovery request from a customer (customer) who installed the distribution board and switchboard, which was activated due to a ground fault and opened (power failure), a 24-hour supply management staff and electrician etc. 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 supply line L) when the customer operates the switch of the device functions as the main circuit breaker, but does not hold the switch of the device, and the leakage of the device (ground line) The leakage current between G and neutral phase wire N) is not detected by the main leakage breaker (known technology), so it may be overlooked when the recovery operation is performed in the service that the supply management staff and electrician, etc. correspond to each other There is.

In addition, the insulation measuring device used for maintenance work is the distribution board used as the earth leakage breaker and the information equipment and household appliances connected to the distribution board. If it is used carelessly, it will damage information equipment and home appliances). Therefore, it is necessary to perform a series of measurement operations including a preliminary survey.

The present invention mainly provides an apparatus for measuring a leakage current state of a low-voltage electrical facility capable of performing a series of measurement operations including a preliminary investigation using a measurement object without using an insulation measurement apparatus or the like used for maintenance work. Objective.

The device that measures the current state of the low-voltage electrical equipment is a power supply transformer (61), a secondary winding (62) of the transformer, and a ground wire (64) that grounds the neutral wire side (63) to the ground. In the TT grounding distribution circuit, which is grounded and grounded at the load side ground terminal (65) of the circuit with the ground line (68), the distribution board with a leakage display function, the load side circuit, and the outlet with the ground electrode ( 35), and a grounding electrode (68) of the distribution board with the earth leakage display function or a earthing pole (68) arranged in the watt hour meter, wherein the earth leakage current measuring device has the earth leakage display function. In measuring the leakage current state between the ground line G and the neutral phase line N connected to the load side circuit of the distribution board (the branch leakage breaker is not detected)

The manual voice guidance operation button (16) opens the main breaker (3) of the distribution panel with the leakage display function by the operation panel release switch (19), and the manual voice guidance operation button (17) performs the primary feed circuit ( 1) The neutral phase N-side switch (8) and the voltage L-side selector switch (11) are opened, and the charging of the main line E3 is discharged by turning on and opening the discharge switch (14) with the manual voice guidance operation button (15). Measure the leakage current status.

When the manual voice guidance operation button (18) is turned on, the voltage L side changeover switch (11) is turned on to apply the limiting voltage and the limiting current to the main line E3, the circuit display means (5) is lit, and the load side circuit Leakage current measuring means, circuit display means (5) and grounding electrode line (68) 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 ground line G and the memory means And a power supply device (13) with a charging function connected to the primary sending circuit (1) and announcing the measurement result, and the circuit display means (5) is turned on by the manual voice guidance operation button (20). The branch leakage breaker (4) is opened, and the result of the leakage current measuring means between the ground line G and the neutral phase line N and between the ground line G and the power supply line L connected to the load side circuit is It is the work to measure the leakage current state provided to the owner and manufacturer registered in

In order to achieve the above object, the apparatus for measuring the leakage current state of the low-voltage electrical equipment according to claim 1 comprises a power supply side transformer (61), a secondary winding (62) of the transformer, and a neutral wire side ( 63) is grounded with the grounding wire (64) grounded to the ground, and the load side grounding terminal (65) of the circuit is grounded with the grounding wire (68) to the ground, too, and the earth leakage display function is provided. Consists of distribution board, load side circuit and outlet with grounding electrode (35), and earthing pole wire (68) of distribution board with earth leakage display function or grounding electrode wire (68) arranged in watt hour meter It consists of a leakage current measuring device.

In a device for measuring a leakage current state between the ground line G and the neutral phase line N connected to the load side circuit of the distribution board with the leakage display function (a branch leakage breaker is not detected), a 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 primary feed circuit (1) neutral phase by the manual voice guidance operation button (17). N-side switch (8) and voltage L-side selector switch (11) are opened, and the manual voice guidance operation button (15) and the discharge switch (14) are turned on and opened to measure charging means for discharging the main 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 the limiting voltage and the limiting current to the main line E3, the circuit display means (5) is lit, and the load side circuit Leakage current measuring means, circuit display means (5) and grounding electrode line (68) 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 ground line G and the memory means And a measuring means comprising a power supply device with a charging function (13) connected to the primary feeding circuit (1) and announcing means for the measurement result;

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 the ground. The result of the leakage current measuring device between the line G and the power supply line L becomes a series of measurement work means provided to the owner and the manufacturer registered with the owner slip.

The device for measuring the current state of the low-voltage electrical equipment includes a distribution board with a leakage display function, a load side circuit and an outlet with a grounding electrode (35), and a grounding electrode wire (68) or power of the distribution panel with a leakage display function. A leakage current measuring device composed of a grounding electrode (68) arranged in a quantity meter, between the distribution board with a leakage display function and a ground wire G and a neutral phase wire N connected to a load side circuit What is the leakage current measuring means in (without detecting branch leakage breaker)? The wiring material VA cable related to the building interior material, mainly metal lightweight ceiling material and metal partitioning material is damaged, and 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 line L Means for measuring leakage current between the two. 2. Means for measuring a leakage current between a ground wire G and a neutral phase wire N connected to a distribution board with a leakage display function and a grounding electrode outlet with an IC tag. 3. The application means for applying a limit voltage and a limit current to the main line E3, the circuit display means is lit, and between the ground line G and the neutral phase line N and between the ground line G and the power line connected to the load side circuit. A leakage current measuring means between L, a circuit display means, a grounding current measuring means, a memory means, and an announcement means for the measurement result, and the manual voice guidance operation button illuminates the circuit display means. The owner who registered the result 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 supply line L connected to the load side circuit in the owner's card. And a series of measurement operations provided to manufacturers.

Circuit diagram of leakage current measuring means between ground line G and neutral phase line N Circuit diagram of leakage current measuring means between ground line G and power line L

A preferred embodiment of an apparatus for measuring a current state of a low-voltage electrical facility according to claim 1 will be described below with reference to FIG. 1 of the accompanying drawings.

First, the configuration relating to the apparatus for measuring the current state of the low-voltage electrical equipment provided with the circuit checking means will be described with reference to the circuit diagrams of FIGS.

As shown in FIG. 1, the leakage current measuring apparatus between the ground line G and the neutral phase line N includes a measurement cable, 14a, 14b, 14c, a switch 15a, a measurement resistance, each having a probe connected to each tip. Reference numeral 16 (short circuit 1) is the measurement object X1N, and the leakage current measuring device between the ground line G and the power supply line L is, as shown in FIG. 24b, 24c, the switch 25a, and the measurement resistor 26 (short circuit 2) are provided with a measurement object X2L, and are configured to be able to measure the leakage current of the measurement object.

In this case, 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 resistors 16 (short circuit 1) and measurement resistors 26 (short circuit 2), A plurality of branch leakage breakers (4, 24), circuit display means (5, 25), and a plurality of relays for switching the connection state of each of these elements are provided. Thus, the application means for applying the limiting voltage and the limiting current to the main line E3 is provided, the circuit display means is turned on, and 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 source. A measuring means comprising a leakage current measuring means between the lines L, a circuit display means, a leakage current measuring means, a memory means, and a measurement result announcement means at the ground electrode;

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.

Next, the usage method of the apparatus which measures the leakage current state of a low voltage | pressure electric installation is demonstrated.

First, the power source lines (L, N), the ground line (G), and the leakage current measuring device between the ground line G and the neutral phase line N are measured with probes connected to the respective tip portions in FIG. Cable 14a, 14b, 14c, switch 15a, measurement resistor 16 (short circuit 1) are installed as the measurement object X1N, and the leakage current measuring device between the ground line G and the power line L is shown in FIG. Measurement cables 24a, 24b, 24c, switches 25a, and measurement resistors 26 (short circuit 2) each having a probe connected to the tip are installed as the measurement object X2L, and the leakage currents of the measurement objects X1N and X2L are measured. It shall be.

Next, the manual voice guidance operation button (16) of the control unit opens the main breaker (3) of the distribution board with a leakage display function by the operation panel release switch (19), and the manual voice guidance operation button (17 ) Open the neutral phase N-side switch (8) and voltage L-side switch (11) of the primary feed circuit (1).
The voltage / current limiting device (9) connected to the voltage L side changeover switch (11) and the display means LED (10) are connected to the load side branch main line E3 of the opened main breaker (3), and The load side ground terminal (67) and the discharge switch (14) are connected to the load side branch main line E3, and the charging of the main line E3 is discharged by turning on and releasing the discharge switch (14) with the manual voice guidance operation button (15). Measuring means;

The manual voice guidance operation button (18) causes the voltage L side changeover switch (11) to be applied to the load side branch main line E3 and to apply a limiting voltage and a limiting current to the main line E3, and circuit display means (5 ) Is lit, and the leakage current measuring means, circuit display means (5), and grounding electrode line (68) between the ground line G and the neutral phase line N and between the ground line G and the power supply line L connected to the load side circuit. ) 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),

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. This is a series of measurement work provided to the owner and the manufacturer who registered the result of the leakage current measuring means between the line G and the power supply line L with the owner slip.

In addition, the power supply with charging function (13, 33) shown in FIGS. 1 and 2 is a single-phase three-wire type supply "The current or voltage of each part of the circuit including a large number of power supplies is one by one for each power supply. The theorem that the current or voltage obtained on the assumption that it is present is equal to the superposition '', this theorem is not limited to the case where the power supply is a sine wave in a circuit composed of R, L, and C. The R, L, and C supply of the power supply device with charging function (13, 33) established (also referred to as superposition), the power supply device with charging function (13, 33) by superposition of AC sine waves The primary feed circuit (1, 21) is supplied with an AC sine wave.

1 and 2, the voltage supply and current limiting device (9) connected to the load voltage L side of the primary feed circuit (1, 21) and the display means LED (10) are “protective fuses”. A parallel-connected AC up-side LED and an AC down-side LED are connected in one direction, and a one-way AC is flown from the anode to the cathode of a neon lamp connected in series, and the cathode side is formed with glow lighting, and the AC waveform is deformed. Is lit at AC 70V, and the limiting voltage that makes AC upside + 35V and AC downside -35V AC unidirectional is "the manual voice guidance operation button (18) and the voltage L side changeover switch (11) is on the load side" An application means for applying a limiting voltage and a limiting current to the trunk line E3 is applied to the branch trunk line E3, the circuit display means is lit, and between the ground line G and the neutral phase line N connected to the load side circuit and the ground line Leakage current measuring means, circuit display means and ground electrode between G and power line L The power supply device with charging function (13) connected to the leakage current measuring means, the memory means, and the measurement result announcement means and the primary feed circuit (1) is connected to the wire and configured to operate together.

In the manual voice guidance operation button of the leakage current measuring apparatus shown in FIGS. 1 and 2 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. The circuit inspection means is that the free electron in the electric wire is only a carrier to carry the electric charge, and the leakage current measuring means is that the current flowing through the circuit always has “going” and “returning”. Since it arrives at the load instantly and returns, a detector (ZCT load side circuit display) is provided in the middle, the current of “going” and “returning” passing through this is measured, and the main line E3 is found to find the difference The circuit display means is lit, and the leakage current 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 applied. Leakage with measurement means, circuit display means and grounding electrode A current measuring means, a memory means, an announcement means for the measurement result, and a power supply device with a charging function connected to the primary feed circuit, and the manual leakage guidance operation button opens the branch leakage breaker that lights up the circuit display means. 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.

For insulation measuring devices used for maintenance work, the main thing is careless about the insulation measuring devices used for maintenance work for distribution boards and information devices and home appliances connected to the switchboard, which are the earth leakage breakers. If the information device or home appliance is damaged when used, it is described in the instruction manual. The main object of the present invention is to provide a device for measuring a leakage current state of a low-voltage electrical facility without using an insulation measuring device or the like used for maintenance work. 1. The above system can improve the low voltage electrical equipment as a means of monitoring advanced electrical conditions. 2. Use product safety check display device (consisting of a distribution board with earth leakage display function and grounding outlet with IC tag) and manual voice guidance operation button system to customers (customers) such as apartment houses It becomes easier to perform housing management work related to housing. 3. Provide the measurement results of leakage current (including deterioration over time) to registered owners and manufacturers using the owner's card. 4. By registering the owner's card, manufacturers can repair malfunctions such as leakage current (including deterioration over time).

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 grounding terminal 68 of load circuit Load side ground wire E Type 3 grounding 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 Side Switch 9 Voltage Current Limiting Device 29 Connected to Voltage L Side Voltage Current Limiting Device Connected to Voltage L Side 10 Display Means LED 30 Display Means LED 11 L Side Change Switch 31 L Side Change Switch E 3 Load-side branch trunk 12 Load-side branch trunk 32 Load-side branch trunk 13 Regular supply circuit 33 of the power supply device with charging function With charging function Always supply circuit 35 of power source 35 Outlet with grounding electrode 351 Power line L352 Neutral phase line N353 Grounding line G354 Outlet 355 connected to primary feed load side Outlet 356 connected to load side of branch leakage breaker Manual shut-off device 357 Automatic Circuit breaker 14 Discharge switch 15 Operation button 16 Operation button 17 Operation button 18 Operation button 19 Operation panel open switch 20 Operation button short circuit 1 Short circuit of earth leakage point G between ground line G connected to load side circuit and neutral phase line N 2 Load Leakage point between ground line G and power line L connected to side circuit

Claims (1)

A leakage current measuring device composed of a distribution board with earth leakage display function, a load side circuit and an outlet with a grounding electrode, and a grounding electrode wire of the distribution board with earth leakage display function or a grounding electrode wire arranged on a watt-hour meter. In the earth leakage current measuring means between the ground line G and the neutral phase line N connected to the load side circuit of the distribution board with earth leakage display function (a branch earth leakage breaker is not detected), a manual voice guidance operation button ( 16) opens the main breaker (3) of the distribution board with leakage display function with the operation panel opening switch (19), and the manual feed guidance button (17) with the primary feed circuit (1) neutral phase N The side switch (8) and the voltage L side switch (11) are opened, and the manual voice guidance operation button (15) turns on and opens the discharge switch (14) to discharge the charge of the trunk line E3. The voltage L side changeover switch (11) is turned on with the button (18), and the trunk line E 3 is used as an application means for applying a limiting voltage and a limiting current, and the circuit display means (5) is lit, and 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. Circuit display means (5), earth leakage current measuring means, memory means, and measurement result announcement means and a power supply device with a charging function connected to the primary feed circuit, the manual voice guidance operation The button (20) opens the branch leakage breaker (4) lit and displayed by the circuit display means (5), and connects the ground line G and the neutral phase line N connected to the load side circuit and the ground line G. An apparatus for measuring a leakage current state of a low-voltage electric facility, which is provided to an owner and a manufacturer who have registered the result of the leakage current measuring means between the power lines L using an owner slip.

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