Temperature relay tests temperature of motor, if it exceeds rating temperature to send a signal, contactor cut off main circuit to complete protection of motor.

温度继电器检测电动机温度，超过额定温度发出信号，接触器切断主电路，完成电机保护。

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Introduction was made to the composition and working principle of a power-off time delay relay which adopts CMOS digital circuit, digital dial disc for switch setting and without auxiliary power.

介绍了一种采用CMOS数字电路、数字拨盘开关整定、无辅助电源的断电延时继电器的组成及工作原理。

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The utility model belongs to a welding holder type controller used for controlling the on-off of a welder, mainly comprising a transformer, a contactor, a relay and a switch indicator circuit.

本实用新型属于一种控制焊机启闭的焊把式控制器，其主要由变压器、接触器、继电器、开关指示电路所组成。

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