Real-time monitoring and protecting device for secondary element of 10kV switch cabinet

Abstract

The invention discloses a real-time monitoring and protecting device for a secondary element of a 10kV switch cabinet. The real-time monitoring and protecting device comprises a CPU, a closed-loop Hall sensor, a volt-ampere resistance measuring unit, an outlet relay, an LCD screen, a keyboard, a communication interface and a power module. The closed-loop Hall sensor is used for measuring the magnitude of direct current in a loop; the volt-ampere resistance measuring unit is used for measuring coil resistance; the CPU is electrically connected with the closed-loop Hall sensor, the volt-ampere resistance measuring unit, the outlet relay, the LCD screen, the keyboard and the communication interface. The power supply module is used for supplying power. According to the 10kV switch cabinet secondary element real-time monitoring protection device, a secondary loop framework is optimized, excessive dependence of a loop on a travel switch contact is avoided, and the damage probability of coilelements is reduced; the troubleshooting speed is accelerated. As long as the device acts, the adhesion or switching abnormity of the switch travel switch contact or locking of the circuit breaker operating mechanism can be determined.

Description

technical field [0001] The invention belongs to the technical field of electric power safety, and in particular relates to a real-time monitoring and protection device for secondary components of a 10kV switch cabinet. Background technique [0002] In the power system, the perfection of the secondary circuit is the basis for the normal operation of the equipment and the correct action of the protection device, and the integrity of the components is fundamental. The integrity of the secondary circuit can be ensured by correct wiring without falling off, but it is difficult to ensure the integrity of components in normal operation. Among them, the secondary circuit structure of the 10kV switchgear is simple, the reliability is low, and the damage of components occurs frequently, especially the related auxiliary contacts in the switchgear. At present, the opening and closing circuits are all connected in series with the switch travel auxiliary contacts, and after the switch is...

AI Technical Summary

Problems solved by technology

In addition, if the limit switch is not in place due to the jamming of the switch mechanism, the state of all the contacts on the limit switch will not change, which will also cause the circuit to be energized for a long time to heat up and burn the coil and motor

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