Comprehensive Smart Circuit Breaker with High Standard CB Analyzer
Type Tests of Circuit Breaker
Type tests are organised with the aim of proving the abilities and making sure the rated characteristic of the circuit breaker are exact. Such tests are conducted in the specially built testing laboratory.
- Mechanical Test- It is mechanical ability type test involving the repeated opening and closing of the breaker. A circuit breaker must close and open at proper speed and do its allocated job and function without any failure.
- Thermal Test- Thermal tests are carried out to check the thermal behavior of the circuit breakers. Due to the streaming of rated current through its pole in a rated condition, the breaker under test undergoes steady-state temperature rises. The temperature rise for rated current should not exceed 40° for current less than 800A normal current and 50° for normal value of current 800A and above.
- Dielectric Test- These tests are performed to check power frequency and impulse voltage withstand capacity. Power frequency tests are kept on a new circuit breaker; the test voltage changes with a circuit breaker rated voltage. In impulse tests, impulse voltage of particular value is employed to the breaker. For outdoor circuit dry and wet tests are conducted.
- Short -Circuit Test- Circuit breakers are subjected to sudden short-circuits in short-circuit test laboratories, and oscillograms are taken to know the behaviour of the circuit breakers at the time of switching in, during contact breaking and after the arc extinction. The oscillograms are studied with particular reference to the making and breaking currents, both symmetrical and asymmetrical restriking voltages, and switchgear is sometimes tested at rated conditions.
Benefits of Circuit Breaker Testing
- Quick and easy to perform on site
- Circuits can be tested on or off load
- Tests performance of whole tripping cycle
- Tests overall timing of tripping system
- Identifies need for maintenance
- Part of a comprehensive diagnostic maintenance program
- Find early indications of possible problems
- Avoid issues other than pick up pieces
- Build up a test record database for trending
- Pick out the bad actors
Secondary Circuit Tester
Audited Supplier 
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