JPH06347492A - High voltage part measuring device - Google Patents

Abstract

PURPOSE:To provide a new type high voltage position measuring device in which a battery in a sensor is made unnecessary, the small size of the sensor is realized, and the operating property of the sensor is improved. CONSTITUTION:This measuring device is composed of a hook 1 to be brought into contact with a charger, a needle electrode 2, a hollow insulating rod 3 to hold the hook 1 and the needle electrode 2, and an ultraviolet-ray (200nm to 360nm) receiver 4. When the phase difference is detected, two sets of hook rods 5 are used, and the receiver 4 and a phase difference detector 6 are connected to compose the system. The hook rod 5 is faverable to cover the measuring device with a substance having a shading property.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high voltage part measuring device, and more particularly to a high voltage part effective for detecting a voltage phase difference at two places charged with a commercial frequency high voltage and displaying a coincidence / disagreement of phases. The present invention relates to a measuring device.

[0002]

2. Description of the Related Art Generally, when temporarily measuring physical quantities such as voltage, current and temperature in high voltage parts such as transmission lines and substation busbars, a sensor is attached to the end of a long insulating rod to improve the physical quantity. Approach or contact the voltage section. Then, the output information of the sensor is converted into a signal of light, sound, radio or the like, propagated through a highly insulating medium such as space or optical fiber, and transmitted to the ground potential section. Conventionally, as one of these means, there is a device that converts a sensor output into an optical signal, propagates it in an optical fiber or a hollow insulating rod, and transmits it to a ground potential portion. In this type of device, when a flashover occurs due to contact with a high-voltage portion, not only a power failure but also an operator's life is concerned, and thus the insulating medium is required to have high electrical insulation. In this sense, the hollow insulating rod has higher insulation than the solid optical fiber, so the method of transmitting light inside the hollow insulating rod is
Better than devices that use optical fibers.

Further, due to construction work of a substation or the like, a power cable being charged may be bypassed. In that case, 3
One end of each of the three bypass cables is connected to the power cable of each phase, the construction site is bypassed, and the other end is connected to the power cable of each phase. At this time, since one end of the bypass cable is already connected to the power cable of each phase, cables of the same phase must be connected to each other. If cables with different phases are connected, it will cause a serious accident, so it is necessary to confirm the same phase and different phases of both cables to be connected before connecting. In this case, conventionally, in order to detect the phase difference of a commercial frequency high voltage, a sensor that converts voltage information into an optical signal is provided at one end of a hollow insulating rod, and the other end receives a light that converts light from the sensor into a voltage signal. 2 with a section
There is a phase detector that has a pair and has a detection unit that receives a voltage signal of two light receiving units with a metal wire and detects a phase difference. When the light-receiving part side of the insulating rod is grasped, the sensor part is lifted and brought into contact with the charging part, the voltage phase information is propagated by light through the hollow insulating rod and is transmitted to the light-receiving part at the ground potential. The light receiving section converts the optical signal into an electric signal, and the detecting section detects the phase difference by the signals from the two light receiving sections.

In the conventional sensor section, a hook for contacting the charging section is connected to a metal electrode via a resistor, and a field effect transistor (FET) is switched depending on whether the potential across the resistor is positive or negative, thereby causing a light emitting transistor (LED). Is turned on and off.

[0005]

However, since the conventional measuring device has circuits such as resistors, FETs, and protection circuits and batteries in the sensor section, the sensor section becomes large and the insulating rod correspondingly becomes large, and the operation is difficult. It's difficult. In addition, the battery is a consumable item and there is a problem that it is inconvenient to replace it.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art, to eliminate the need for a battery in the sensor section, and to provide a novel high voltage section measuring apparatus in which the sensor section is downsized and the operability is improved. is there.

[0007]

SUMMARY OF THE INVENTION The gist of the present invention is to use a hook and a needle electrode in the sensor section, which eliminates the need for a battery in the sensor section and reduces the size of the sensor section. is there.

That is, the above object of the present invention is to provide a hollow insulating rod having a space transmitting portion for transmitting light therein and a physical quantity of the high voltage portion when the high voltage portion is provided at the tip of the insulating rod. A sensor section for detecting, a transmitting section for sending out an optical signal corresponding to the physical quantity to the spatial transmitting section, and an optical signal from the transmitting section provided at the base end of the insulating rod and transmitted through the spatial transmission path. A high-voltage part measuring device having a receiving part for receiving a high voltage part measuring device, wherein the sensor part and the transmitting part comprise a hook and a needle electrode, and a battery is not required.

A high voltage measuring device according to claim 1
A high-voltage unit measuring device, characterized in that the receiver is connected to a phase detector to measure a voltage phase difference at two locations by using a combination.

Is achieved by

In the present invention, the hook and needle electrodes are made of metal, and the insulating rod is made of fiber reinforced plastic (FRP). The phase difference detection unit can be easily realized by using a microcomputer.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a device configuration of a preferred embodiment of the present invention.

This device comprises a hook 1 for contacting the charging section,
It is composed of a needle electrode 2, a hollow insulating rod 3 supporting these, and an ultraviolet (200 nm to 360 nm) light receiver 4. When performing phase difference detection, two sets of hook rods 5 of this apparatus are used and the light receiver 4 is connected to the phase difference detector 6. The hook bar 5 is preferably one in which the measuring device is covered with a light-shielding material.

When the hook 1 is brought into contact with the charging portion, the tip of the needle electrode 2 has a high electric field, and corona is generated corresponding to the peak of the commercial frequency high voltage, and ultraviolet rays are emitted. The emitted ultraviolet light propagates through the hollow insulating rod 3 and reaches the ultraviolet light receiver 4. The ultraviolet light receiver 4 converts an ultraviolet signal into an electric signal. This electrical signal peaks when the charging section voltage has a negative peak. The phase difference detection unit 6 receives signals from two points of the hook rod 5, finds the time when the signal becomes maximum within one cycle of an arbitrary commercial frequency, and detects the phase difference from these differences. If the phase difference is less than the set value, the same phase is displayed, and if it is more than the set value, the different phase is displayed.

[0015]

According to the high voltage part measuring device of the present invention, the sensor part and the transmitter part serve as hooks and needle electrodes, and a battery is not required. Therefore, the sensor part can be made light and small and the insulating rod can be made thin. Therefore, the operability is improved.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a high voltage part measuring apparatus of the present invention.

[Explanation of symbols]

 1 hook 2 needle electrode 3 hollow insulating rod 4 ultraviolet light receiver 5 hook rod 6 phase difference detector

Claims (2)

[Claims] 1. A hollow insulating rod having a space transmitting portion for transmitting light therein, and a sensor portion provided at a tip of the insulating rod for detecting a physical quantity of the high voltage portion when the high voltage portion is approached. A transmitter that sends an optical signal corresponding to the physical quantity to the space transmitter, and a receiver that is provided at the base end of the insulating rod and that receives the optical signal from the transmitter transmitted through the space transmission line. A high-voltage part measuring device comprising: a high-voltage part measuring device, wherein the sensor part and the transmitting part are composed of hooks and needle electrodes, and do not require a battery. 2. A high voltage part measuring device, characterized in that, by using two sets of the high voltage part measuring device according to claim 1, the receiving part is connected to a phase detecting part to measure a voltage phase difference at two places. .