Intelligentized low voltage power consumption system and fault judgment method thereof

Abstract

The invention discloses an intelligentized low voltage power consumption system and a fault judgment method thereof. The intelligentized low voltage power consumption system comprises an MCB (Miniature Circuit Breaker) connected with a power grid, and a plurality of intelligent switches which are connected to the output end of the MCB in parallel; the intelligent switches supply power to power consumption equipment; when a circuit where a certain intelligent switch is located is faulty, the MCB trips immediately to play a protecting role, and meanwhile, the corresponding intelligent switch also trips because of detecting that the circuit is faulty, and generates a tripping record which is then uploaded to a remote control end of the intelligent switch; when the MCB is switched on, the corresponding intelligent switch cannot be switched on until the remote control end cancels the record. According to the intelligent low voltage power consumption system and the fault judgment method thereof, the intelligent switches act as branch switches instead of branch MCBs, so that the intelligentized low voltage power consumption system can well protect and control all pieces of power consumption equipment without affecting the safety and the reliability of a power circuit, without causing protection failure of the MCB caused by the installation of the intelligent switches and without causing poor service to the power consumption equipment; in the meantime, the intelligentization function is increased, and the power consumption system can be used for automatically judging a faulty circuit.

Description

technical field [0001] The invention relates to the field of power consumption, in particular to an intelligent low-voltage power consumption system and a fault judgment method thereof. Background technique [0002] At present, most of the existing low-voltage power consumption systems supply power to electrical equipment through miniature circuit breakers (MCB for short) connected to the grid; MCBs are connected in parallel at the output end of the total MCB. MCB is the most widely used terminal protection device in building electrical terminals. It is an electrical device that has both manual switch function and automatic short-circuit protection. It can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and can automatically cut off the circuit when a short-circuit fault occurs in the line. Its function is equivalent to fuse Combination of type switch and overheating and underheating relay. And after breaking...

AI Technical Summary

Problems solved by technology

However, the normal operation of MCB can only be manual, and it cannot provide overload, over-voltage and under-voltage protection and automatic control, and cannot meet the requirements of the current power system informatization, networking, intelligence and multi-functionality.

The intelligent switch has the functions of breaking load current, leakage fault current, overload, overvoltage and undervoltage protection, and remote control on / off, but it cannot be used as a terminal protection device alone because it does not have short circuit protection, so it needs to cooperate with MCB

And related fields also do not see that it is used in conjunction with MCB

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