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Anti-Pumping: A “Must-Have” That Still Goes Wrong in Practice In high-voltage circuit breaker control circuits, anti-pumping (anti-reclose on an active command) is not optional. It is written into relay protection and anti-misoperation guidelines as a   hard requirement : Before a breaker has completed one open–close–open sequence, the close coil must not receive another effective close command. Yet in real projects, two recurring issues still appear: Misuse of the breaker  o

Discovery of the Problem At the start of our company’s journey, our first product was an optocoupler isolation terminal, designed to...