VCB Current Chopping Evaluation

Published by Electrotek Concepts, Inc., PQSoft Case Study: VCB Current Chopping Evaluation, Document ID: PQS1207, Date: June 1, 2012. Abstract: This case study presents a customer vacuum circuit breaker (VCB) current chopping transient overvoltage evaluation. A high-frequency transient model was created to simulate vacuum circuit breaker opening and closing and the resulting transient overvoltages and arresterContinue reading “VCB Current Chopping Evaluation”

Study of 345 kV Transient Recovery Voltages

Published by Electrotek Concepts, Inc., PQSoft Case Study: Study of 345 kV Transient Recovery Voltages, Document ID: PQS0602, Date: January 1, 2006. Abstract: Transient recovery voltage (TRV) is the voltage across the terminals of a pole of circuit breaker following current zero when interrupting faults. TRV waveshapes can be oscillatory, exponential, cosine-exponential or combinations of theseContinue reading “Study of 345 kV Transient Recovery Voltages”

What is Circuit Breaker Testing and How is it Done

Published by Carelabs (Carelabz), Website: Circuit Breaker Testing is utilised to test the operation of each switching systems and the programming of the entire tripping structure. Circuit Breaker Testing is essential to ensure the safe and reliable performance of this key link in the power asset chain. Circuit breakers perform three main tasks: They should conductContinue reading “What is Circuit Breaker Testing and How is it Done”