名词
中文翻译：自我测试式继电器
同义词：
['self-testing relay', 'self-testing switch', 'self-testing circuit breaker']
例句：
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1. The self-test relay is used to ensure that the system is functioning properly before it is turned on.
自检继电器用于在系统启动前确保其正常运行。
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2. The self-test relay was designed to prevent power outages during peak usage periods.
自检继电器旨在在高峰使用期间防止电力中断。
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3.The self-test relay is a crucial component of the electrical system, ensuring that all components are working correctly.
自检继电器是电气系统的关键组成部分，确保所有组件都正确工作。