... contact electromotive force 接触电动势 contact fault 触点故障 contact force 触点压力 ...
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当过热或者高电流或电压脉冲导致触点焊接在一起时，就会发生接触故障，形成短路。
Contact failure can occur when excessive heat or a high current or voltage pulse causes the contacts to weld together, resulting in short circuits.
继电器是保护系统的逻辑元件，它感知故障，并使断路器解扣电路带电和断路器打开触点。
Relays are the logic elements of a protection system which sense the fault and cause the circuit-breaker trip circuits to be energized and the breakers to open their contacts.
触点熔焊是继电器最为严重的故障形式之一。
Welding is one of the worst faults for an electromagnetic relay.
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