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实用新型
CN204479951U 电机加热器控制电路 失效 - 权利终止

电机加热器控制电路
摘要：
一种电机加热器控制电路，包括：一次回路、控制变压器、启停回路及信号回路；启停回路与信号回路连接至控制变压器的一端，控制变压器的另一端连接一次回路；启停回路包括手动电路、自动电路及第一接触器；自动电路上设有第一旋钮开关及带电显示接点；手动电路上设有第二接触器及依次串联连接的第二旋钮开关、第一带灯按钮、第二带灯按钮，第二接触器与第一带灯按钮并联连接；信号回路上设置有第三带灯按钮、第四带灯按钮、第三接触器及第四接触器，第三带灯按钮与第三接触器串联形成第一串联电路，第四带灯按钮与第四接触器串联形成第二串联电路，第一串联电路与第二串联电路并联。本实用新型可以保证电机加热器及时、准确地投入。
摘要（英）：

The utility model discloses a motor heater control circuit which comprises a primary loop, a control transformer, a start-stop loop and a signal loop. The start-stop loop and the signal loop are connected with one end of the control transformer. The other end of the control transformer is connected with the primary loop. The start-stop loop comprises a manual circuit, an automatic circuit and a first contactor. The automatic circuit is provided with a first knob switch and a charged display contact. The manual circuit is provided with a second contactor, a second knob switch, a first button with a light and a second button with a light, wherein the second knob switch, the first button with the light and the second button with the light are successively connected in series. The second contactor is connected in parallel with the first button with the light. The signal loop is provided with a third button with a light, a fourth button with a light, a third contactor and a fourth contactor. The third button with the light and the third contactor are connected in series to form a first series circuit. The fourth button with the light and the fourth contactor are connected in series to form a second series circuit. The first series circuit is connected in parallel with the second series circuit. According to the utility model, the input of a motor heater is timely and accurate.

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