Automatic interlocking control system of two incoming line cabinets and one bus coupler cabinet and operation method

Abstract

The invention discloses an automatic interlocking control system of two incoming line cabinets and one bus coupler cabinet and an operation method. The system comprises an ATS022 dual-power-supply intelligent controller, miniature circuit breakers 1CB and 2CB, contactors KM1 and KM2, a contactor mechanical interlock VM3, a time-delay relay KC, a time-delay relay KO, incoming line main switches CB1and CB2, a bus coupler switch CB3, an intermediate relay KA1, fuses FU1, FU2 and FU3, terminal strips X1, X2 and X3, and an indicating lamp. The terminal strips X1, X2 and X3 are connected through connecting wires between cabinets. Under the unmanned condition, the ATS022 dual-power-supply intelligent controller can automatically detect the state of power supplies according to the set condition,automatically switches the circuit breakers, and displays the operation state of the circuit breakers in real time according to the indicating lamp arranged on the cabinet surface. The system can be applied to different systems, is safe, and saves raw materials and cost.

Description

technical field [0001] The invention relates to a control system with two incoming lines and one bus tie, in particular to an automatic chain control system and an operation method for two incoming line cabinets and one bus tie cabinet. Background technique [0002] The primary wiring commonly used in low-voltage power distribution networks includes: single busbar wiring, single busbar segmental wiring. [0003] Single-bus section wiring has the following operation modes: [0004] 1. The power terminals of the I-section busbar and the II-section busbar are powered. At this time, the circuit breakers of the incoming line 1 and the incoming line 2 are closed, and the bus tie circuit breaker is disconnected and cannot be closed (use the contacts of the three circuit breakers for interlocking. According to the principle, three circuit breakers can only close two circuit breakers at the same time). [0005] 2. After the circuit breaker of incoming line  1 or incoming line 2 tri...

AI Technical Summary

Problems solved by technology

[0004] 1. The power terminals of the I-section busbar and the II-section busbar are powered. At this time, the circuit breakers of the incoming line 1 and the incoming line 2 are closed, and the bus tie circuit breaker is disconnected and cannot be closed (use the contacts of the three circuit breakers for interlocking. principle, three circuit breakers can only close two circuit breakers at the same time)

[0005] 2. After the circuit breaker of incoming line  1 or incoming line 2 trips due to power failure or fault, the bus tie circuit breaker should be closed at this time. At this time, the circuit breaker of incoming line 1 or incoming line 2 continues to supply power with two busbars (using three open circuits The principle of interlocking the contacts of the circuit breaker itself, three circuit breakers can only close two circuit breakers at the same time)

[0008] The control of the first and second operation modes can only be controlled by manual control. The circuit breakers in the two incoming line cabinets and the bus coupler cabinet can be opened and closed by buttons, and the contacts of the circuit breaker itself can be used for interlocking. It can only start two circuit breakers at the same time, which is not intelligent enough

[0009] The third mode of operation realizes automatic control through the intermediate relay and the power-off delay relay, so that only two circuit breakers can be started at the same time, but this scheme that relies on intermediate and time auxiliary points is not safe and reliable enough.

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