Provides automatic defeat of delay on loss of voltage or sustained undervoltage of emergency source, provided normal supply has been restored.
恢复正常供电的前提下，在失压或应急源的持续欠压下提供延迟的自动失效。
Provides automatic defeat of delay on loss of voltage or sustained undervoltage of emergency source, provided normal supply has been restored.
恢复正常供电的前提下，在失压或应急源的持续欠压下提供延迟的自动失效。
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