CN205103361U - High voltage electric energy metering device detector of working a telephone switchboard - Google Patents

Abstract

The utility model discloses a wiring checker for a high-voltage electric energy metering device, which relates to the technical field of electric energy equipment. Transformers and metering voltage transformers are all installed in a high-voltage mutual inductance cabinet, and an electric energy meter and a three-phase power source are installed inside the ammeter box. The three-phase voltage output terminal is connected to one end of the transformer, the U and W phase current output terminals of the three-phase power source are connected to the load side, one end of the transformer is respectively connected to the U, V, and W phases of the power supply side, and the U, W phases of the power supply side are connected to each other. Metering voltage transformers are installed on the phases, and the other end of the transformer is connected to the electric energy meter through the secondary circuit cable. Connection; the utility model can check whether the connection of the metering device of the high-power meter is correct in the uncharged state, and the measurement is accurate and fast, and can also judge the metering voltage and the transformation ratio of the current transformer.

Description

A high-voltage electric energy metering device wiring inspection instrument

technical field

The utility model relates to a wiring checker for a high-voltage electric energy metering device, which belongs to the technical field of electric energy equipment.

Background technique

In the prior art, it is inconvenient to check whether the wiring of the metering device of the high-power meter is correct, and the measurement is inaccurate, and the metering voltage and the ratio of the current transformer cannot be judged, so the operation is complicated.

Utility model content

In view of the above problems, the technical problem to be solved by the utility model is to provide a high-voltage electric energy metering device wiring checker.

The utility model relates to a wiring inspection instrument for a high-voltage electric energy metering device, which includes a three-phase power source, a three-phase graphic phase meter, an ammeter box, a high-voltage mutual inductance cabinet, an electric energy meter, a transformer, a metering voltage transformer; a transformer, and a metering voltage transformer They are all installed in the high-voltage mutual inductance cabinet, and the electric energy meter is installed inside the ammeter box. The three-phase voltage output terminal of the three-phase power source is connected to one end of the transformer, and the U and W phase current output terminals of the three-phase power source are connected to the load side. One end of the transformer is connected to the U, V, and W phases of the power supply side, and metering voltage transformers are installed on the U, W phases of the power supply side, and the other end of the transformer is connected to the electric energy meter through the secondary circuit cable. The three-phase voltage collection input terminal of the phase meter and the current signal collection input terminal of the clamp ammeter are both connected to the electric energy meter.

The beneficial effects of the utility model are: it can check whether the connection of the metering device of the high-power meter is correct in the uncharged state, the measurement is accurate and fast, and the metering voltage and the transformation ratio of the current transformer can also be judged.

Description of drawings

For ease of illustration, the utility model is described in detail by the following specific implementation and accompanying drawings.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic diagram of three-phase power source in the utility model;

Fig. 3 is a schematic diagram of a three-phase graph phase meter in the utility model.

In the figure: 1-three-phase power source; 2-three-phase graphic phase meter; 3-ammeter box; 4-high voltage transformer cabinet; 5-electric energy meter; TV-transformer; TA-metering voltage transformer.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below through specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessarily confusing the concept of the present invention.

As shown in Figures 1-3, this embodiment adopts the following technical solutions: it includes a three-phase power source 1, a three-phase graphic phase meter 2, an ammeter box 3, a high-voltage mutual inductance cabinet 4, an electric energy meter 5, a transformer TV, and a metering voltage The transformer TA; the transformer TV and the metering voltage transformer TA are all installed in the high-voltage transformer cabinet 4, the electric energy meter 5 is installed inside the ammeter box 3, and the three-phase voltage output terminal of the three-phase power source 1 is connected with one end of the transformer TV, The U and W phase current output ends of the three-phase power source 1 are connected to the load side, and one end of the transformer TV is respectively connected to the U, V, and W phases of the power supply side, and metering voltage transformers are installed on the U and W phases of the power supply side TA, the other end of the transformer TV is connected to the energy meter 5 through the secondary loop cable, and the three-phase voltage input terminal of the three-phase graphic phase meter 2 and the current signal input terminal of the clamp ammeter are both connected to the energy meter 5 .

The working principle of this specific embodiment is: apply 100V three-phase sinusoidal AC voltage to the primary side of the voltage transformer of the high-voltage metering device through the power source, apply 5A AC current to the primary side of the current transformer, and the host computer detects the voltage at the terminal of the electric energy meter and current, such as 10kV voltage transformer transformation ratio is 10kV/0.1kV, then the voltage of 1V should be measured at the voltage terminal of the electric energy meter, and the transformation ratio of the current transformer is 50/5, then the clamp ammeter is on the electric energy meter The current loop measures a current of 0.5A. According to the voltage and current phasor diagram displayed by the host, if it is basically consistent with the output phase of the power source, the wiring is correct, and combined with the measured voltage and current values, it can be verified by the following relational formula Transformation ratio of voltage and current transformers,

.

This specific embodiment has the following characteristics:

1. The cooperation of the three-phase power source 1 and the three-phase graphic phase meter 2 can judge whether the wiring of the high-voltage metering device in the power failure state is correct, and can judge the ratio of the metering voltage and current transformer.

2. Use the main unit alone to judge whether the wiring of the high-voltage metering device in the live running state is correct.

Main purpose: Wiring inspection of newly installed high-voltage metering devices or changes after power failure; wiring inspection of high-voltage metering devices under electrified operation.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (1)

1. a high-voltage electric-energy meter wiring check instrument, is characterized in that: it comprises three phase power source, triphasic configuration phase meter, reometer case, high pressure mutual inductance cabinet, electric energy meter, transformer, metered voltage mutual inductor, transformer, metered voltage mutual inductor is installed in high pressure mutual inductance cabinet, the inside of reometer case is provided with electric energy meter, the three-phase voltage output terminal of three phase power source is connected with one end of transformer, the U of three phase power source, W phase current output terminal is connected with load side, one end of transformer respectively with the U of mains side, V, W is connected, the U of mains side, W phase is all provided with metered voltage mutual inductor, the other end of transformer is connected with electric energy meter by secondary circuit cable, collection three-phase voltage input end and the clamp on amperemeter of triphasic configuration phase meter gather current signal input end and are all connected with electric energy meter.