Relays are the logic elements of a protectionsystem which sense the fault and cause the circuit-breaker trip circuits to be energized and the breakers to open their contacts.
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。
2
The paper mainly discusses the automatic switching of the logic estimation circuit of the drum boiler's water level protectionsystem.
文章主要讨论了锅炉汽包水位高低保护系统逻辑判断回路的自动切换。
3
The article also indicated the structure and feature of the safety logicsystem from the view of factory-safety protection.