It is only when the correct voltages are applied to the A/C amplifier from the key inputs that the primary output (the A/C compressor relay) will be energised.
只有A/C扩大器上的电压是来自输入端的正确电压时，初级输出（即A/C压缩机继电器）才会被激活开启。
2
Introduction was made to the key test items and technical requirements of contactor type relay reliability research.
介绍了接触器式继电器町靠性研究的重点试验项目及技术要求。
3
The key points of condition-based maintenance of relay protection are state diagnosis, state assessment and maintenance decision-making method.