DIGITAL TESTING OF HIGH VOLTAGE CIRCUIT BREAKER

ABSTRACT

The functionality of high voltage circuit breaker is tested in high power laboratories. With the advancement of power system need for high voltage circuit breaker has increased a lot, as they play an important role in transmission and distribution. Among the tests, Routine tests are performed on every piece of circuit breaker in the premises of the manufacturer where as Type tests are performed in a high voltage laboratory. The test is performed on sample pieces of circuit breaker of each type to confirm their characteristics and rated capacities according to their design. Digital testing of high voltage circuit breaker employs a software product for testing of a breaker model, once its characteristic fingerprints are obtained from the standard tests. High-resolution measurements of current and voltage are done in the critical period. The arc voltage is measured with standard broadband RCR type voltage divider and current with special Rogowski coil.