Time delay, the protection of water shortage, the control and display of high and low pressure, the control and display of temperature, the protectionof over load, the oil heating, the errors display and so on.

• 机内设置高压保护、低压保护、过流过载保护、时间延时、相序保护、缺相保护、缺水保护、联锁控制等安全保护装置。