低压重载系统中，保护载荷度可能取代热载荷度，导致保护不合理动作以及后续连锁过程。
In case of low voltage and heavy load, the relay loadability may replace the thermal loadability, leading to undesirable relay operation and cascading events.
带油压、故障检测，各种动作连锁；
Oil levels detection, with failure testing, and all actions are interconnect;
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