大容量断路器的主要故障模式之一是触头弹簧在较高温度下出现的应力松弛。
The stress relaxation of contact spring appeared at high temperature is one of the main failure modes in high capacity circuit breaker.
所述的自动转换开关还设有包括一个限止件和一个复位弹簧的锁定装 置，有效的保证了触头的压力，使接通与分断能力有了较大的提高。
The invention also includes the lock-in device with the bound piece and the reset spring, which ensures the right press of the contact, improves the capacity of connecting and breaking.
永久磁铁和动触头固定在摆动板上，摆动板可偏转，顶端通过弹簧吊置在线圈支架上。
A permanent magnet and a moving contact are fixed on a swing plate which can deflect, and the top end of the swing plate is hung on a coil brace through a spring.
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