然后我们关闭热水器的电力加热器的开关并将断路器打开。
Then open the “hot out” valve at the electric water heater and turn the breaker on.
这种试验主要被用于测试中高功率的电力或电子技术中采用的元器件或设备(断路器，开关，变压器，绝缘子等等)。
These tests are above all used to test components or equipment employed in electricity or electro-technology of medium and high power (circuit-breakers, switches, transformers, insulators, etc...).
真空断路器是电力系统中压领域的一种开关设备，它担负着控制和保护的双重任务。
The vacuum circuit breaker is a kind of switch equipment which is used in the middle-voltage field in the power system, which undertakes double tasks of controlling and protecting.
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