Small current testing device

Abstract

The invention relates to a small current testing device which comprises a current acquisition control panel, an amplification factor switching switch, a current acquisition interface and a special test line, the current acquisition control panel is arranged at the top of the testing device, the amplification factor switching switch is arranged on one side of the current acquisition control panel,the current acquisition interface is arranged on the side wall of the testing device, one end of the special test line is connected with the testing device, and the other end of the special test lineis connected with the running device to be tested. The testing device provided by the invention can be used for solving the partial problem on production, the practicability is high, the cost is low,the effect is fast, and the comprehensive popularization and application prospect is achieved.

Description

technical field [0001] The invention relates to the field of power measuring equipment, in particular to a small current testing device. Background technique [0002] The "hexagonal diagram" test is the last pass to ensure the safe operation of substation equipment, and it is a magic weapon for relay protection staff to judge the correctness of the wiring group, polarity, transformation ratio and protection direction of the AC secondary circuit. However, in the actual power transmission process of the substation, it is often encountered that the equipment cannot carry the load or the load is too small due to various reasons, and it is impossible or difficult to carry out the conventional "hexagonal diagram" test of the above situation. [0003] In recent years, with the development of the State Grid, more and more new substations have been put into power transmission one after another. Although some equipment has impacted power transmission, it does not meet the "hexagonal d...

AI Technical Summary

Problems solved by technology

However, in the actual power transmission process of the substation, it is often encountered that the equipment cannot carry the load or the load is too small due to various reasons, and it is impossible or difficult to carry out the conventional "hexagonal diagram" test work of the above situation

[0003] In recent years, with the development of the State Grid, more and more new substations have been put into power transmission one after another. Although some equipment has impacted power transmission, it does not meet the "hexagonal diagram" test conditions, and some equipment cannot be brought in for a short time. The load or load is small, and it is in the hot standby charging state for a long time. It is impossible to draw a conclusion at the first time, which will bring more troubles and unsafe hidden dangers to future work. This is a common problem that currently plagues relay protection professionals.

Images