BSG Method for Dead-Tank Circuit Breakers

Safety in high-voltage substations is the highest priority for all personnel involved, so accordingly regulations and laws require all objects to be grounded on both sides before any maintenance work is performed, to eliminate the risk of induced high voltages and currents at the ungrounded terminal.

If both sides are grounded, applying conventional main contact state detection methods is not possible because there is a parallel circuit through grounding cables and the grounding network, and the device would always detect a closed circuit.

Existing test methods, intended for timing measurement when both sides are grounded, are not accurate or applicable for dead tank circuit breakers with a pole-pole-pole-neutral (P-P-P-N) grounding system, but only for pole-neutral (P-N) grounding system. A novel method for testing a dead tank CB with both sides grounded that would be applicable for all types of grounding systems will be presented.

The webinar will be held in the English language. The number of participants is limited to 250.