Vacuum switch abnormal conduction monitoring security system

Abstract

The invention relates to a monitoring security system for abnormal switch-on of a vacuum switch. A branch by which an auxiliary power supply coil of a live display is connected with another opening auxiliary switch in series is connected with a control branch in parallel; the auxiliary power supply coil of the live display is also connected with a branch in parallel by which a relay coil is connected with a normally-opened contact of the live display in series; a normally-closed contact of a relay is connected in the control branch in series; a branch by which a normally-opened contact of the relay is connected with a coil of an electromagnetic lock in series is connected with the control branch in parallel; and the electromagnetic lock is installed on a switch cabinet and is used for locking an opened handcart. The invention has the positive effect that after the monitoring security system is used, not only can the accident of abnormal switch-on occurring in the primary-side vacuum switch be immediately prompted to an operator, but also the major accident of casualty and equipment damage caused by the explosion of the vacuum switch can be avoided.

Description

technical field [0001] The invention belongs to the technical field of high-voltage vacuum switch failure monitoring, in particular to a vacuum switch abnormal conduction monitoring security system. Background technique [0002] The central vacuum switch is often used in 10 kV power equipment. The vacuum switch includes a handcart 6. The handcart is slidably installed in the switch cabinet 4 through rollers 7. A moving contact is installed on the handcart. When the handcart is pushed When switching cabinets, the moving contact contacts the static contact to make the primary side conduction, and the secondary side control and locking contacts of the vacuum switch follow up. However, once the vacuum degree of the vacuum switch is reduced, the breakdown between the moving and static contacts, or the fault of the transmission mechanism causes the moving contact of a certain phase to fail to open normally, it will cause an abnormal conduction accident of the vacuum switch, and th...

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Problems solved by technology

However, once the vacuum degree of the vacuum switch is reduced, the breakdown between the moving and static contacts, or the fault of the transmission mechanism causes the moving contact of a certain phase to fail to open normally, it will cause an abnormal conduction accident of the vacuum switch, and the explosion of the vacuum switch will easily occur. , major accidents that cause personal injury to operators or equipment damage

[0003] The current safe operation management mode and technical level cannot timely and accurately detect the accident of abnormal conduction of the vacuum switch, nor can it automatically complete the locking of the handcart, which has caused great harm to the personal safety of the operators and the normal operation of the equipment. the threat of

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