名词
中文翻译：次要断路器
同义词：
['subordinate breaker', 'secondary circuit breaker']
例句：
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1. The main powersupply is a primary breaker that controls the entire system.
主电源是一个主要的断路器，它控制整个系统。
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2. The secondary breaker is used to protect the electrical equipment from overload.
次要断路器用于保护电气设备免受过载。
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3. In this case, the secondary breaker was triggered by an unexpected surge in current.
在这种情况下，次要断路器被意外的电流激增触发了。