A large-capacity intelligent commutation switch

Abstract

The invention relates to the field of low-voltage power supply facilities, and discloses a large-capacity intelligent phase-change switch which has larger load capacity, is high in integration and intelligence and is more suitable for processing and mass production. The large-capacity intelligent phase-change switch comprises a top casing, a bottom casing and a bottom plate which are installed inorder from front to back, the surface of the top casing is provided with a display control board, the center of the bottom casing is fixed with a motor, the rotation shaft of the motor is connected with an electromagnetic relay, the top portion of the electromagnetic relay is provided with an angle sensor, a main control board and a power module are fixed in the bottom casing, at least one set ofmoving contacts are uniformly distributed at the outer circumference of the electromagnetic relay, one sides of the moving contacts are provided with an opening detection circuit, the lower portions of the moving contacts are provided with locking sliding pieces, the inner sides of the locking sliding pieces are provided with trip assemblies, the moving contacts pass through moving contact supports, the moving contact supports are fixed on the bottom casing, and the outer sides of the moving contact supports are provided with fixed contacts corresponding to the moving contacts.

Description

technical field [0001] The invention relates to the field of low-voltage power supply facilities, in particular to a large-capacity intelligent phase change switch. Background technique [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 Pub...

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 disadvantages are that the overall load capacity is low and the unit power cost is high; the commutation switch has only one set of live wire and neutral wire output, and the adjustment accuracy of the three-phase unbalance is poor; The arc is large during the process; there is no control and display system, and the control operation is inconvenient

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