当电流超过限制值时，过负荷电流继电器自动保护振荡管和整流器，同时可以避免由不当操作所引起的频率漂移。
The over-current relay works to protect oscillation tubes and rectifier, when the current exceeds its limits. Frequency deviation caused by faulty operation is also prevented.
大多数保护开关为自动，手动或多通道远程继电器开关。
Most protection switches provide Auto, Manual or Remote relay switching between two or more channels.
继电器具有相位故障保护和从手动转换为自动重置的功能。
Thermal overload relays offer phase failure protection and are convertible from manual to automatic reset.
继电器具有相位故障保护和从手动转换为自动重置的功能。
Thermal overload relays offer phase failure protection and are convertible from manual to automatic reset.
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