Closing coil protection device
A closing coil and protection device technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of coil burnout, unsuccessful closing, unstable and unreliable closing switch control, etc., to achieve easy replacement and avoid burning , Easy to check the effect of circuit failure
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[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0021] Existing closing circuits such as figure 1 As shown, operate the KK switch, the normally open contacts 9 and 10 are shifted to be connected, or the remote control closing method is adopted: after the contact YH is connected, the closing holding relay HBJ is charged, and the HBJ auxiliary contact is closed. After that, even after the KK switch 9, 10 contacts or the remote control closing contact YH is disconnected, the closing coil HQ is still charged until the closing is successful, which normally takes about 0.2 seconds. Since it takes about 0.2 seconds for the auxiliary contact D...
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