Multifunctional active mimic circuit breaker

Abstract

The invention relates to a multifunctional active mimic circuit breaker. The multifunctional active mimic circuit breaker comprises a shell body, a built-in battery and built-in circuits, wherein the built-in battery and the built-in circuits are contained inside the shell body, the built-in circuits comprise three paths of circuits of the same structure, each path of circuits comprises a switching-on circuit, a tripping circuit and a position-remaining circuit, the built-in circuits further comprise a circuit formed by connecting a three-phase/ single-phase change-over switch with a three-phase/ single-phase change-over relay ZH in series and a circuit formed by connecting contacts of a position relay with each phase of switching-on indication lamps in series, the outer shell is a cuboid metal outer shell made of metal plates, and a three-phase connection/disconnection operation and display area, an auxiliary contact connecting area, a 110V coil connecting-in point connecting area and an idle contact connection-in point connecting area are respectively manufactured on a front panel of the metal outer shell. The multifunctional active mimic circuit breaker is provided with the simple circuits, is high in cost performance, is used flexibly on site, and can save cost.

Description

technical field [0001] The invention belongs to the technical field of relay protection, in particular to a multifunctional active analog circuit breaker. Background technique [0002] At present, when engaged in relay protection work and commissioning of relay protection devices and high-voltage circuit breakers, the following problems are often encountered: a. In the initial stage of engineering construction at the commissioning site, the primary switchgear often does not have the transmission conditions, and the simulated reclosing Faults, standby self-switching protection actions, etc., will bring difficulties to the transmission when the protection of the position contact of the circuit breaker is required, and reduce the debugging efficiency; The staff who overhaul the high-voltage circuit breaker and the commissioning personnel of the relay protection device take turns to overhaul the operation, prolonging the power line outage time, and cross-operation is also prone ...

AI Technical Summary

Problems solved by technology

[0002] At present, when engaged in relay protection work and commissioning of relay protection devices and high-voltage circuit breakers, the following problems are often encountered: a. In the initial stage of engineering construction at the commissioning site, the primary switchgear often does not have the transmission conditions, and the simulated reclosing Faults, standby self-switching protection actions, etc., will bring difficulties to the transmission when the protection of the position contact of the circuit breaker is required, and reduce the debugging efficiency; The staff who overhaul the high-voltage circuit breaker and the commissioning personnel of the relay protection device take turns to overhaul the operation, prolonging the power line outage time, and cross-operation is also prone to safety hazards; c. Repeat the whole group of tests, and the high-voltage circuit breaker repeatedly trips and closes the test action, Shorten the life of the high-voltage circuit breaker, which will adversely affect the mechanical structure of the high-voltage circuit breaker; d. Because the high-voltage circuit breaker is in the energized operation state, no power failure is allowed. circuit breaker tripped

[0003] However, the existing analog circuit breakers on the market generally have the following shortcomings: a. The existing analog circuit breakers cannot regard the A / B / C three-phase switch as a three-phase independent circuit breaker. When the protection of multiple switches is involved in the action, etc., multiple analog circuit breakers are required; b. The existing analog circuit breaker needs to be connected to an external 220V AC power supply, which is inconvenient to use; c. The existing analog circuit breaker does not provide the operation box function and cannot realize protection Device empty contact trip function

Images