Remote multifunctional mutual inductor secondary circuit polarity tester

Abstract

The invention relates to a remote multifunctional mutual inductor secondary circuit polarity tester. The remote multifunctional mutual inductor secondary circuit polarity tester is characterized in that a rechargeable lithium battery is connected with an inching relay in series, four wiring terminals A, B, C and N are arranged outside a primary side shell, three relay contact switches communicatewith the four wiring terminals, and the four wiring terminals are respectively connected to the primary side loops of the mutual inductor; the four wiring terminals A, B, C and N are arranged outsidea secondary side shell, the four wiring terminals are respectively connected to the secondary side loops of the mutual inductor; a loop change-over switch and a function change-over switch are connected in series, and a polarity pointer meter and an insulation test meter / direct-current resistance tester are connected in parallel and jointly connected to the function change-over switch. The remotemultifunctional mutual inductor secondary circuit polarity tester is scientific and reasonable, is flexible and convenient to operate, can achieve the free conversion of six groups of loops and the testing of auxiliary DC resistance and loop insulation, reduces the manpower investment and operation risks, and improves the work efficiency.

Description

technical field [0001] The invention belongs to the technical field of transformer substation debugging in electric power systems, and relates to a transformer polarity testing device, in particular to a remote multifunctional transformer secondary circuit polarity testing instrument. Background technique [0002] In the modern power network, it is basically the form of power supply on both sides of the power network. Since there are power sources on both sides, in order to minimize the scope of power outages, circuit breakers and protection devices are installed on both sides of each line and can Determine the direction of current and voltage. Therefore, it is very important to verify the polarity direction of the secondary circuit of the transformer. If the polarity direction is wrong, it will cause the protection device to malfunction and cause the power outage to expand. [0003] Now, in the process of relay protection debugging in all substations, the method of verifyi...

AI Technical Summary

Problems solved by technology

Therefore, it is very important to verify the polarity direction of the secondary circuit of the transformer. If the polarity direction is wrong, it will cause the protection device to malfunction and cause the power outage to expand.

[0003] Now, in the process of relay protection debugging in all substations, the method of verifying the polarity direction of the transformer is relatively clumsy, and at least three people are required to cooperate with the walkie-talkie. a match

Moreover, the secondary circuit of the transformer does not have only one group but multiple groups, and the workload of the corresponding secondary end is greatly increased, and the work process will be relatively slow.

The traditional polarity direction verification method is time-consuming and labor-intensive, and it is also dangerous for personnel to touch dry batteries on the primary side all the time.

[0004] Through the search of published patent documents, no published patent documents similar to this patent application have been found

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