power source for relay control

例句：

1. 1. The relay control system requires a stable power source to ensure reliable operation.
   继电器控制系统需要稳定的电源以确保可靠运行。
2. 2. The relay control power supply is crucial for the safe operation of the electrical system.
   继电器控制电源对于电气系统的安全可靠运行至关重要。
3. 3. The relay control power supply must be carefully monitored to prevent any potential hazards.
   必须仔细监控继电器控制电源，以防止任何潜在危险。