Intelligent tester for metering wiring of secondary circuit

Abstract

The invention discloses an intelligent tester for metering the wiring of a secondary circuit. The intelligent tester comprises a pulse signal device. The output end of the pulse signal device is electrically connected with a signal clip capable of clamping the primary-side terminal of a transformer through a signal line. The intelligent tester further comprises two output clips in clamped cooperation with the secondary-side terminal of the transformer. The two output clips are connected in parallel with a charging capacitor through output lines. A one-way diode is connected in series between the positive electrode of the charging capacitor and the corresponding output line. The positive electrode of the charging capacitor is electrically connected with the input end of a single-chip microcomputer. The output end of the single-chip microcomputer is electrically connected with an alarm. The intelligent tester is reasonable in structure, simple in operation, convenient in detection, time-saving and labor-saving, wherein the intelligent tester can assist in completing the wiring detection of an integrated electric control cabinet transformer. Meanwhile, by means of the intelligent tester, detection results can be quickly judged and the operation can be completed by only one person. Therefore, the detection efficiency is improved.

Description

technical field [0001] The invention relates to an intelligent tester for metering secondary circuit wiring. Background technique [0002] At present, 10kV power distribution cabinets generally adopt an integrated design. The transformer and its secondary circuit wiring have been installed in the cabinet when the equipment leaves the factory, which greatly facilitates the installation of metering, but sometimes the primary polarity of the transformer may occur. In case of reverse connection or secondary wiring error. Due to the hidden layout of the secondary wiring, it is difficult to observe directly with the naked eye. In order to ensure the accuracy of measurement, the wiring of the secondary circuit must be checked. [0003] Since there is no special auxiliary equipment for checking the wiring of the secondary circuit, the traditional method used by power commissioning personnel is the "multimeter on-off method", that is, to use the multimeter to test the on-off positio...

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the internal connection of the transformer, the traditional method needs to disassemble the secondary wiring of the transformer. After the inspection is completed, the wiring needs to be restored, which adds unnecessary trouble

[0006] 2. The transformer is installed inside the baffle of the cabinet, which is not easy to access, inconvenient to test, time-consuming and laborious

[0007] 3. The length of the multimeter test lead is limited, and it cannot be directly connected to both sides of the secondary wiring. Additional wires of sufficient length are needed to form a loop

[0008] 4. The test lead of the multimeter is a needle-shaped design. Someone must press the test lead on the secondary circuit terminal during the test. For a power distribution cabinet with a small space, only one person can operate a test lead, so at least two people are required to complete the test. Test work, low work efficiency

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