Automatic test tool for fault indicator and use method

By using a low-power current pulse controlled by a PLC and an automatic verification module for detection, the problems of low efficiency and high safety risks in fault indicator testing are solved, achieving efficient and reliable automated testing, which is suitable for fault indicator testing in power systems.

CN122449451APending Publication Date: 2026-07-24STATE GRID HEBEI ELECTRIC POWER RES INST +1
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Patent Information

Application Number
CN202610809928.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-05
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing fault indicator testing suffers from low efficiency, poor consistency, and high safety risks. In particular, contactors in automated solutions are prone to burn-out failure due to electric arc impact, resulting in low reliability.

Method used

The test formula is loaded using a programmable logic controller (PLC), combined with a programmable pulse power supply and a pulse excitation assembly. The fault indicator is triggered by generating an equivalent instantaneous magnetic field through a low-power current pulse, and the action area is detected by an automatic verification module to avoid the switching of real high current.

Benefits of technology

It significantly extends the service life of testing fixtures, reduces maintenance costs and safety hazards, improves testing efficiency and consistency, and meets the needs of long-term industrial production.

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Abstract

The invention relates to the technical field of fault indicator factory detection, in particular to an automatic test tool for a fault indicator and a use method. The system comprises the steps that a PLC loads a test formula which is matched with a to-be-tested fault indicator and comprises excitation parameters and verification parameters; the programmable pulse power supply is electrically connected with the PLC and the pulse excitation assembly, and a to-be-tested fault indicator placed in the adapter nest is positioned in an effective excitation area of the pulse excitation assembly; the PLC controls the programmable pulse power supply to output a current pulse to the pulse excitation assembly according to the excitation parameters, generates an instantaneous magnetic field equivalent to a preset instantaneous current, and triggers the to-be-tested fault indicator to act; and the automatic verification module detects the action area of the fault indicator to be tested according to the control signal sent by the PLC and the verification parameter sent by the PLC to obtain a test result. The problems of low efficiency, poor consistency, high potential safety hazard, ablation failure caused by arc impact and low reliability can be solved.
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