Automatic reclosing lock device of intelligent circuit breaker

Abstract

The invention discloses an automatic reclosing lock device of an intelligent circuit breaker. According to the automatic reclosing lock device of the intelligent circuit breaker, a master switch (S) and a fuse wire (R) are connected to a 220V control power supply led from an upper pile head of an isolation switch, five subcircuits are connected to the master switch (S) in parallel, the first subcircuit is connected to a work indicating lamp (LD), the second subcircuit is formed by series connection of a normally-closed auxiliary contact of the circuit breaker (QF) and a time-delay coil of a closing time-delay relay (KT1), the third subcircuit is formed after a normally-open contact of the closing time-delay relay (KT1) is connected with a normally-closed contact of an intermediate relay (KA) in parallel and then connected with a normally-closed contact of an action time-delay relay (KT2) and a coil of the intermediate relay (KA) in series, the fourth subcircuit is formed by series connection of a normally-open contact of the intermediate relay (KA) and a coil of the action time-delay relay (KT2), and the fifth subcircuit is formed by parallel connection of the normally-open contact of the intermediate relay (KA) and a closing button of the circuit breaker (QF). According to the automatic reclosing lock device of the intelligent circuit breaker, automatic reclosing lock of the circuit breaker is achieved through setting and cooperation of elements such as the time-delay relay and the intermediate relay, the circuit is simple, action is reliable, and operation is stable.

Description

technical field [0001] The invention relates to an intelligent circuit breaker reclosing device, in particular to meet the requirements of automatic reclosing of the circuit breaker after power transmission through a power grid through a delay relay and an intermediate relay. Background technique [0002] In industrial and agricultural production and people's daily life, a large number of smart circuit breakers are used in low-voltage power distribution rooms to control the power on and off. ) protection in one, when the power supply has short circuit, overload, voltage loss (undervoltage), etc., it can quickly cut off the power supply to protect the safety of the power grid and electrical equipment. However, in practice, there are often users who cancel the loss of voltage (undervoltage) function of the smart circuit breaker. There is no need to manually operate the smart circuit breaker to quickly restore power supply and reduce the workload of maintenance personnel. The...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a reclosing device for an intelligent circuit breaker, which overcomes the need for manual power transmission of the intelligent circuit breaker after power transmission from the grid and the loss of voltage (undervoltage) The coil may cause lightning damage to electrical equipment within the power supply range of the circuit breaker. This device can not only maintain the original various protection functions of the intelligent circuit breaker to work normally, but also automatically switch on the intelligent circuit breaker after the grid is powered, reducing manual transmission. Maintenance costs brought by electricity

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