The Circuit Breaker Tester under Wuhan UHV can help many power workers conduct various power tests more conveniently.

1.Multimeter: Checks continuity, voltage, and resistance (basic tool).

2.Insulation Resistance Tester (Megger): Tests insulation quality between phases and to ground when the breaker is open (critical safety test).

3.Relay Protection Tester: Injects high current to test the breaker's protection functions (overload, short-circuit tripping accuracy & timing) – Core test tool for low-voltage breakers.

4.Contact Resistance Tester (Microhmmeter): Measures contact resistance of main contacts when closed, indicating contact condition and potential overheating.

5.Circuit Breaker Analyzer (Mechanical Timing Tester): Measures trip/close times, speed, synchronization, etc., to assess operating mechanism health (especially critical for medium/high-voltage).

Additional Tools for Medium/High-Voltage Breakers:

6.High-Voltage Withstand (Hi-Pot) Tester: Applies high voltage to test main insulation strength.

7.SF₆ Gas Tools (if applicable):

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