Anti-secondary closing control device
A control device and main gate technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as poor heat dissipation conditions, thyristor damage, power cabinet expansion, etc., to protect personal safety and prevent the main gate from closing The effect of the gate
Inactive Publication Date: 2016-04-13
HUAIBEI PINGXIANG ELECTRIC FURNACE
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Problems solved by technology
[0002] During the use of the thyristor, due to its own quality, the overvoltage generated by the power grid, and the overcurrent caused by the short circuit of the load, the long-term use of poor water quality will cause fouling in the radiator, poor heat dissipation conditions, and excessive water pressure will cause the cooling water hose to be damaged. Explosion, overvoltage after shutdown and many other factors lead to damage to the thyristor, and the self-protection circuit of the equipment automatically shuts down the equipment. If the main switch is manually closed again at this time, the rectifier transformer may be burned, causing a large-scale power outage, and the power cabinet is damaged. Major accidents that further expand or cause personal injury to operators
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[0009] Such as figure 1 The anti-secondary closing control device shown is installed in the energy storage circuit 9 of the main gate of the main circuit, including an intermediate relay unit 1, an optocoupler isolation unit 2, a comparator unit 3, an advanced detection unit 4, and a switch output unit 5 , execution unit 6, fault alarm unit 7, power supply unit 8; the output of execution unit 6 is divided into three routes, one route is connected to the intermediate relay unit 1, the other route is connected to the fault alarm unit 7, and the third route is connected to the energy storage circuit of the main gate of the main circuit 9; wherein the advanced detection unit 4 is connected to the execution unit 6 through the switch output unit 5, and the execution unit 6 sends a detection instruction to the intermediate relay unit 1. When the detection result of the intermediate relay unit 1 is faulty, the instruction is sent through the optocoupler isolation unit 2 to the compara...
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The invention discloses a second-time switch-on resistant control device which is installed in an energy storage circuit of a main circuit main switch. The second-time switch-on resistant control device comprises an intermediate relay unit, an optocoupler isolation unit, a comparator unit, an advanced detection unit, a switch output unit, an execution unit, a fault alarm unit and a power supply unit. The output of the execution unit is divided into three paths, wherein one path is connected with the intermediate relay unit, another path is connected with the fault alarm unit and a third path is connected in the energy storage circuit of the main circuit main switch. According to the second-time switch-on resistant control device, action of switch-on of the main circuit can be automatically detected and controlled. When a rectifier thyristor is damaged, energy storage of switch-on of the main circuit is prohibited so that switch-on of the main switch is prevented and the device and personal safety of operational staffs are protected.
Description
technical field [0001] The invention relates to an anti-secondary closing control device, which is mainly used in large and medium-sized equipment for thyristor rectification. Background technique [0002] During the use of the thyristor, due to its own quality, the overvoltage generated by the power grid, and the overcurrent caused by the short circuit of the load, the long-term use of poor water quality will cause fouling in the radiator, poor heat dissipation conditions, and excessive water pressure will cause the cooling water hose to be damaged. Explosion, overvoltage after shutdown and many other factors lead to damage to the thyristor, and the self-protection circuit of the equipment automatically shuts down the equipment. If the main switch is manually closed again at this time, the rectifier transformer may be burned, causing a large-scale power outage, and the power cabinet is damaged. Major accidents that further expand or cause personal injury to operators. Con...
Claims
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IPC IPC(8): G05B9/02
Inventor 史万平
Owner HUAIBEI PINGXIANG ELECTRIC FURNACE