Any LED system should be able to appropriately track overvoltage, undervoltage, short circuit, open circuit, and thermal runaway conditions.

任何LED系统都应当能够适度跟踪过高、欠压、短路、开路和热逃逸等问题。

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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.

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。

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Aiming at developing problem of test system for circuit board for large scale and complicated electronic equipment, the open model was presented.

针对大型复杂电子装备电路板测试系统的开发问题，提出了一种开放式开发模式。

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