Portable current transformer polarity tester

Abstract

The invention provides a portable current transformer polarity tester, and relates to the field of electric power construction equipment detection. The portable current transformer polarity tester is structurally characterized in that the tester (1) is provided with a power source socket (2), the power source socket (2) is connected with a storage battery (3), which is arranged at a bottom edge of the tester (1), through a wire, the storage battery (3) is connected with a DC constant voltage source (4), an anode of the DC constant voltage source (4) is sequentially connected with a switch (10), an indicator lamp (11) and an anode socket B (9) of a voltage output end through a wire, a cathode of the DC constant voltage source (4) is connected with a cathode socket B (8) of the voltage output end through a wire, an anode of an ammeter (5) is connected with an anode socket A (7) of a current test end, and a cathode of the ammeter (5) is connected with a cathode socket A (6) of the current test end.

Description

1. Technical field [0001] The invention relates to the field of detection of electric power construction equipment, in particular to a portable current transformer polarity tester. 2. Background technology [0002] At present, the current transformer polarity detection technology has become mature, but the existing detection technology has certain disadvantages in the use method and the size of the instrument. For example, the detection method is cumbersome, and it cannot be applied to the polarity test of the installed current transformer, etc., and the existing testers in the market are large in size, which is very inconvenient to use on site. In addition, statistics show that many testers need an external 220V power supply, and it is very cumbersome to connect the power supply at the construction site. After investigation, it was found that the municipal companies under the Qinghai Provincial Electric Power Company used dry batteries as the voltage source when testing th...

AI Technical Summary

Problems solved by technology

There are still many problems in this test method, such as the phenomenon of poor contact when clicking the primary winding of the current transformer with a dry battery during the test, the phenomenon that the mA meter of the secondary winding is easily damaged, and the problem of inconvenient handling on site, etc.

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