By hvhipot 
The Circuit Breaker Tester under HV Hipot Electric Co., Ltd. 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) �C 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):
Leak Detector: Finds gas leaks.
Moisture (Dew Point) Tester: Measures gas moisture content.
One-Sentence Summary:
Basic Safety: Multimeter + Megger.
Protection Function: Relay Protection Tester (core for LV).
Contact Condition: Contact Resistance Tester.
Mechanical Health: Circuit Breaker Analyzer (core for MV/HV).
HV Insulation: Hi-Pot Tester.
SF₆
Health: Leak Detector + Moisture Tester.
Core Principle: Safety first!
Always use qualified personnel.