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Low voltage phase commutation device

A low-voltage, three-phase technology, used in circuit devices, AC network circuits, electrical components, etc., can solve problems such as secondary switching, achieve extended service life, good shielding effect, and reduce the effect of not being able to commutate in time

Active Publication Date: 2016-09-28
LISHUI POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing phase change switch only displays the data of the currently connected phase, and the field operator can only randomly select the other two phases during manual operation, resulting in the possibility of secondary switching in a short period of time

Method used

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Embodiment Construction

[0016] Such as figure 1 A low-voltage phase change device shown includes a housing 1, and a three-phase data display screen 2 arranged on the surface of the housing 1, a manual phase change switch 3, a current connection phase display screen 4, input and output terminals 5 and mode The selection switch 6, the mode selection switch 6 is a double-throw switch, and the housing 1 is also provided with an input phase data detection mechanism including a current sensor and a voltage sensor, a comparator, a main control unit and a switching mechanism, and the main control unit It is a single-chip microcomputer, and the input phase data detection mechanism detects three-phase data respectively, and its output terminal is connected to the three-phase data display screen 2, and is connected to the main control unit through a comparator, and the input terminal in the input-output connection terminal 5 is passed through a switching mechanism Connect the output terminal, the controller of ...

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Abstract

The invention discloses a low voltage phase commutation device. The device includes a housing, and a three-phase data display screen, a manual phase commutation switch, a currently connected phase display screen, an input output wiring terminal and a mode selecting switch arranged on the surface of the housing. The housing is also provided with an input phase data detecting mechanism, a comparator, a master control unit and a switching mechanism. The input phase data detecting mechanism detects data of three phases separately and the output terminal of the input phase data detecting mechanism is connected with the three phase data display screen and is connected to the master control unit through the comparator. The input terminal in the input output wiring terminal is connected with the output terminal through the switching mechanism. A controller of the switching mechanism is connected with the master control unit and the manual phase commutation switch through the mode selecting switch. The output terminal of the master control unit is also connected with the currently connected phase display screen. According to the invention, data of the three phases is display on the housing at the same time. A field operator can choose the optimal phase for switching operation accurately, so that device operation safety is improved.

Description

technical field [0001] The invention relates to a low-voltage phase commutation device. Background technique [0002] Three-phase four-wire power supply lines with single-phase power consumption are prone to inconsistent three-phase current or voltage amplitudes. When the amplitude difference exceeds the specified range, it is a three-phase imbalance, which will increase the power loss of the line, The power loss of the distribution transformer increases, the power distribution output decreases, and the distribution transformer generates zero-sequence current, which affects the safe operation of the electrical equipment; the phase change switch is a device that switches the power supply from the other two phases when the three-phase imbalance occurs. The phase change switch of the switch only displays the data of the currently connected phase, and the field operator cannot know the data of the other two phases during manual operation, and can only select randomly. It is poss...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/005
Inventor 章寒冰陈晓春王曜飞宋亚夫王立娜夏晓晖胡志宏宋维忱刘杨洪光法朱惠贞赵利挺
Owner LISHUI POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
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