Charged detecting circuit for forcible locking device

Abstract

The invention discloses a charged detecting circuit for a forcible locking device. The charged detecting circuit is connected with a three-phase high-voltage sensor. The charged detecting circuit comprises a charged display circuit and a timing electrifying circuit, wherein the charged display circuit and the timing electrifying circuit are interconnected; and the charged displaying circuit is used for receiving a sensor signal, displaying the charged condition, and outputting a high-low level signal to the timing electrifying circuit. With the adoption of the charged detecting circuit for the forcible locking device provided by the invention, the high-voltage charged condition can be detected and displayed; and the forcible locking device can be driven to be unlocked after determining that no high-voltage charged circumstance occurs, and the safety is improved.

Description

technical field [0001] The invention relates to a live detection circuit for a forced locking device. Background technique [0002] Due to its simplicity and reliability, the ring network cabinet has been widely used in the city's distribution network power supply network. However, the incoming line units of the ring network cabinet are all incoming lines from the bottom. The conventional electromagnetic lock method is often used on site because the electromagnetic lock control cannot be provided. Power supply, and the emergency unlocking operation is adopted, at this time, the reliability of the anti-misoperation device of the ring main unit itself is reduced, and there may be vicious misoperations that cannot prevent the electrified and grounding switch. Therefore, the operation of the grounding switch must be controlled, that is, when the load switch is opened, it must be judged whether there is electricity on the incoming line side of the cable, and the grounding switch ...

AI Technical Summary

Problems solved by technology

[0002] Due to its simplicity and reliability, the ring network cabinet has been widely used in the city's distribution network power supply network. However, the incoming line units of the ring network cabinet are all incoming lines from the bottom. The conventional electromagnetic lock method is often used on site because the electromagnetic lock control cannot be provided. Power supply, and the emergency unlocking operation is adopted, at this time, the reliability of the anti-misoperation device of the ring main unit itself is reduced, and there may be vicious misoperations that cannot prevent the electrified grounding switch

Therefore, the operation of the grounding switch must be controlled, that is, when the load switch is opened, it must be judged whether there is electricity on the side of the cable incoming line, and the grounding switch is allowed to be closed only when the cable is not charged. The traditional method is to padlock the operating hole of the grounding switch , when operating the grounding switch, the operator shall make manual judgment, and unlock it for operation when the cable is out of power, but there is always the possibility of making mistakes in manual judgment, which makes the distribution network operation and life safety hidden dangers

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