开关电源把直流电源或交流电源通过它可以获得一个稳定的直流电压源。
Switching power supply or DC power to AC power through it will be a stable DC voltage source.
在连接交流电源之前，请验证交流电压、相位和频率是否与控制装置外壳门参数板上的相应数据相同。
Verify ac line voltage phase and frequency with the controller data plate on the enclosure door prior to connecting ac power.
介绍了用于电压继电器动作特性测试的可程控交流电源。
A programmable power supply which tests action characteristic of voltage relay is presented.
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