Electric mechanical interlocking type two-incoming-line and one-bus-couple system

Abstract

The invention discloses an electric mechanical interlocking type two-incoming-line and one-bus-couple system. The system provided by the invention comprises a first incoming breaker which is connected with a first power supply incoming line and a second incoming breaker which is connected with a second power supply incoming line; the first incoming breaker is connected with a first group of load through a first bus and the second incoming breaker is connected with a second group of the load through a second bus; the system further comprises a bus couple switch which is used for connecting the first bus with the second bus; the first incoming breaker, the second incoming breaker and the bus couple switch are all provided with switch contact sets and electric operation mechanisms for driving the switch contact sets to switch on / off; the system further comprises a controller which is electrically connected with the electric operation mechanisms and further comprises a power supply circuit which is electrically connected with the controller. According to the invention, the system is not limited by an installation position and the mechanical interlocking can be realized; the power supply switching can be reliably realized and wounding accidents caused by reverse power transmission can be avoided; when the mechanical interlocking is installed, the automatic and rapid power supply switching can be realized by adopting a PLC (Programmable Logic Controller) logic control relay, so that the labor power for judging and operating can be saved and the accidents caused by the incorrect manipulation can be avoided.

Description

technical field [0001] The invention relates to a power supply control system, more specifically a two-inlet and one bus-tie power supply system, which realizes the interlocking of two incoming line switches and one bus-tie switch through the combination of electricity and machinery. Background technique [0002] At present, the two-inlet and one-bustie system used in the market is often due to the space limitation of the power distribution room. The two high-capacity transformer incoming line switches are arranged in a row respectively. Due to the distance between the two incoming line switches, they are either controlled by logic such as PLC. Relays realize electrical interlocking and automatic switching of the power system; or purely manual control switching, using key locks to achieve only mechanical interlocking. The former uses relays to achieve electrical interlocking, but because there is no mechanical interlocking, the system is unreliable, and electrical failures c...

AI Technical Summary

Problems solved by technology

[0002] At present, the two-inlet-one bus-tie system used in the market is often due to the space limitation of the power distribution room. The two high-capacity transformer incoming line switches are arranged in a row respectively. Due to the distance between the two incoming line switches, they are either controlled by logic such as PLC. Relays realize electrical interlocking and automatic switching of the power system; or purely manual control switching, using key locks to achieve only mechanical interlocking

The former uses relays to achieve electrical interlocking, but because there is no mechanical interlocking, the system is unreliable, and electrical failures can lead to reverse power transmission and injury accidents; the latter is due to purely mechanical interlocking. Breaking one line of incoming line switch and then connecting the bus tie switch can not realize fast and correct automatic power conversion, which may lead to long power outage, huge economic losses, or major accidents caused by misoperation due to human paralysis

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