JP2003259511A - Power receiving and distributing facility and method of diagnosing deterioration of insulation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power receiving and distributing facility which is equipped with high-voltage apparatuses such as a disconnector, a breaker, etc., capable of determining insulation quantitatively even in power supply state, and a method of diagnosing deterioration of insulation. <P>SOLUTION: The power receiving and distributing facility is equipped with the high-voltage apparatuses such as a breaker 2, a disconnector 3, etc., receives supplied power through a main wiring path, and supplies the supplied power to loads. A dummy terminal 6 of the same specification as the terminals of the cable connectors of the high-voltage apparatuses such as the breaker 2, the disconnector 3, etc., is arranged in the vicinity of the apparatuses 2 and 3. The dummy terminal 6 can receive the power supply from the main wiring path via an exclusive switch. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power receiving / distributing equipment and an insulation deterioration diagnosing method, and it is possible to safely estimate the insulation state in the inspection of the power receiving / distributing equipment including high-voltage equipment such as a disconnector and a switch. The present invention relates to a power receiving and distribution facility and an insulation deterioration diagnosing method.

[0002]

2. Description of the Related Art As a method of confirming the insulation state of high-voltage equipment such as disconnecting switches and switches in power distribution equipment, a method of measuring the insulation resistance of the equipment is known. However, this method must be performed in a power failure state in which power supply to the device or the entire circuit including the device is stopped. However, when inspecting high-voltage equipment, it is often impossible to stop the power supply for the convenience of the user. In this case, since it is impossible to measure the insulation resistance of the device, the inspector uses the experience of the inspector to visually check the dust accumulation state of the device as a method of confirming the insulation state. . In this method, the judgment of the insulation state is difficult because the judgments vary depending on the experience of the inspector and individual differences. Therefore, there is a case where an incorrect judgment is made and the use is continued as it is, resulting in an accident due to insulation deterioration.

[0003]

In the above-mentioned prior art, it is difficult to make an appropriate judgment because the inspection while the power is being supplied to the equipment depends on the individual of the inspector.

The present invention solves the problems of the prior art, and is a power receiving and distribution facility equipped with high-voltage equipment such as a disconnector and a switch, which makes it possible to quantitatively determine the insulation state even when the power is being supplied. Another object of the present invention is to provide an insulation deterioration diagnosis method.

[0005]

SUMMARY OF THE INVENTION The present invention provides a power distribution equipment which is provided with high-voltage equipment such as a disconnector and a switch, and which receives power supplied through a main wiring path and supplies the supplied power to a load. A power receiving / distributing facility in which a simulated terminal having the same or similar specification as a terminal of a wire connecting portion of a high-voltage device such as the disconnector and the switch is arranged in the vicinity of the device.

Further, the present invention is a power receiving and distributing facility in which the simulated terminal receives power from the main wiring line via a dedicated switch.

The present invention is a power receiving and distributing facility having a structure in which the simulated terminal can be drawn out.

Further, the present invention is a power distribution equipment having an insulation resistance measuring terminal connected to the above-mentioned simulated terminal.

Further, the present invention is provided with high-voltage equipment such as a disconnector and a switch, receives the supplied power through the main wiring path, and diagnoses the insulation deterioration in the power distribution equipment for supplying the supplied power to the load. The method is to check the insulation resistance, contamination status, etc. of a simulated terminal that has the same or similar specifications as the terminal of the wire connection part of the equipment, which is placed near the high-voltage equipment such as the disconnector and switch. This is an insulation deterioration diagnosis method for estimating the insulation deterioration state of a device.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described.
An embodiment of the power receiving and distributing equipment and the insulation deterioration diagnosis method of the present invention will be described below with reference to FIG. FIG. 1 is an explanatory diagram of a front surface and a side surface of a power receiving and distributing facility according to an embodiment.

An example will be described. As shown in FIGS. 1 (a) and 1 (b), the power distribution equipment of the present embodiment is provided with devices for power supply, for example, a switch 2, a disconnector 3, a transformer 4, a current transformer 5 and the like. There is. These devices are arranged in a metal casing 1 and are connected by electric wires or the like to form a switchboard or the like. Then, as shown in a partially enlarged explanatory view of FIG. 1B, a mounting plate 61, an insulator 62, and a terminal 63 are provided near the switch 2.
The simulated terminal 6 constituted by is provided. The simulated terminal 6 has the same or similar specifications as the terminals of the electric wire connection part of the high-voltage equipment, is arranged in the vicinity of the equipment, and the switchboard is provided in a state where it can be easily removed even when the power is supplied. . The simulated terminal 6 may be provided in the vicinity of other devices such as the disconnector 3 and the transformer 4 whose insulation deterioration status is to be determined. No power is supplied to this simulated terminal 6.

Since the simulated terminal 6 has a structure in which power is not supplied, the insulation resistance measuring device 7 can measure the insulation resistance value even when the power circuit, which is a load, is supplied with power. By comparing this measurement result with the initial insulation resistance value of the simulated terminal 6, it is possible to accurately confirm the insulation deterioration state of the simulated terminal 6. Since the switch 2 is located in the vicinity of the simulated terminal 6, the deterioration conditions are almost the same,
By grasping the degree of deterioration of the simulated terminal 6, the degree of deterioration of the switch 2 can be estimated, and the insulation resistance value at the time of measurement can be estimated from the initial insulation resistance value of the switch 2. The insulation state of the simulation terminal 6 may be confirmed by touching the simulation terminal 6 on the contamination state of the simulation terminal 6 or by collecting dust and the like and analyzing it.

In the above embodiment, the simulated terminal 6 is not supplied with power, but when the deterioration of insulation due to the supply of power is different, a dedicated switch is provided to separate power supply to the load. The insulation resistance may be measured independently so that the insulation resistance can be measured.

Further, if the storage device is installed on the back side of the switchboard, the simulated terminal 6 must be provided on the back side as well. Therefore, the simulated terminal 6 may be structured so that it can be easily pulled out to the front, or a terminal for insulation resistance measurement, which is connected from the simulated terminal 6 in advance, may be provided on the front side in advance.

In the above-mentioned embodiment, the device arranged in the metal case has been described, but the device may be installed inside or outside the electric machine room.

[0016]

According to the present invention, there is obtained a power receiving and distributing facility equipped with high-voltage equipment such as a disconnector and a switch, and an insulation deterioration diagnosing method, which makes it possible to quantitatively determine the insulation state even in a power supply state. be able to.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a front surface and a side surface of a power receiving and distributing facility according to an embodiment.

[Explanation of symbols]

1 case 2 switch 3 disconnector 4 transformer 5 Current transformer 6 simulated terminals 61 Mounting plate 62 Insulator 63 terminals 7 Insulation resistance measuring instrument

Claims (5)

[Claims] 1. A high-voltage device such as a disconnector and a switch is provided,
In power distribution equipment that receives the supplied power through the main wiring path and supplies the supplied power to the load, a model with the same or similar specifications as the terminal of the wire connection part of the high-voltage equipment such as the disconnector and switch. A power receiving and distributing facility characterized by arranging terminals near the device. 2. The power distribution equipment according to claim 1, wherein the simulated terminal receives power from the main wiring path via a dedicated switch. 3. The power distribution equipment according to claim 1, wherein the simulated terminal has a drawable structure. 4. The power distribution equipment according to claim 1, further comprising an insulation resistance measuring terminal connected to the simulated terminal. 5. A high-voltage device such as a disconnector and a switch is provided,
A method for diagnosing insulation deterioration in power receiving and distribution equipment that receives the supplied power through a main wiring path and supplies the supplied power to a load, which is arranged in the vicinity of the high-voltage equipment such as the disconnector and the switch. A method for diagnosing insulation deterioration, which comprises estimating the insulation deterioration state of a device by confirming the insulation resistance, stain state, etc. of a simulated terminal having the same or similar specifications as the terminal of the electric wire connection part of the device.