Intelligent phase-change switch

Abstract

The invention relates to the field of low-voltage power supply facilities, in particular to an intelligent phase-change switch. The intelligent phase-change switch comprises a shell composed of an upper shell and a bottom shell. A switch handle and a terminal cover are arranged on the upper shell. The intelligent phase phase-change switch is characterized in that an N inlet terminal, L1 inlet terminal, L2 inlet terminal and L3 inlet terminal are arranged sequentially from left to right at the top end of the bottom shell, and a null line terminal and fire wire terminal are arranged at the bottom end of the bottom shell. The bottom shell is provided with a tripping electromagnetic switch corresponding to the N inlet terminal, three parallel commutating electromagnetic switches, an error-proof locking system and a switching mechanism. The armature end part of the phase-change electromagnetic switch is connected with a phase-change guide rod, and the end part of the phase-change guide rodis connected with a movable contact mounted on a movable head slider, and a static contact is correspondingly arranged below the movable contact, and the static contact is connected with the fire wireterminal through a wire. The invention has the advantages of simple and reasonable structure, low product noise, good arc extinguishing performance, good mechanical performance, high reliability andaccuracy of the motion mechanism, and is suitable for processing and manufacturing and mass production.

Description

(1) Technical field [0001] The invention relates to the field of low-voltage power supply facilities, in particular to an intelligent phase change switch. (2) Background technology [0002] In the low-voltage power grid, three-phase unbalance refers to the inconsistency of the three-phase current (or voltage) amplitude in the power system, and the amplitude difference exceeds the specified range. Three-phase imbalance will increase the power loss of lines and distribution transformers, reduce the output of distribution transformers, generate zero-sequence currents from distribution transformers, reduce the efficiency of motors, and affect the safe operation of electrical equipment. Therefore, in the actual power supply process, the power department tries to distribute the single-phase and two-phase loads evenly to the three phases to maintain the three-phase balance; and the use of commutation switches is one of the most commonly used means. [0003] Chinese Patent Publicat...

AI Technical Summary

Problems solved by technology

Three-phase imbalance will increase the power loss of lines and distribution transformers, reduce the output of distribution transformers, generate zero-sequence currents from distribution transformers, reduce the efficiency of motors, and affect the safe operation of electrical equipment.

Its shortcoming is that the contact of the commutation electromagnetic switch is a single contact structure, without shock absorption and noise reduction structure, the arc extinguishing effect is poor, and the noise is large; there is no opening position switch, and it is impossible to detect whether it is in the opening position. Clear mechanical disconnection indication

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