低压配电系统继电保护拾零

Discussion on Relaying in a Low Voltage Distribution System

低压配电系统常采用自动开关、熔断器和热继电器作为保护元件，正确选择这些元件，有利于区分保护的选择性与灵敏度。

Auto-switch, fuse and heat relay should be used as protective ele- ments in a low voltage distribution system. Correct selection of these elements is useful to differentiate selectivity and sensitivity of the protective device.