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High voltage frequency changer isolation trolley type high voltage switch cabinet

A high-voltage frequency converter and high-voltage switchgear technology, which is applied in the direction of pull-out switchgear, switchgear, electrical components, etc., can solve the problems of invisible electrical breakpoints, high failure rate, and complicated control of the frequency converter, and achieve improved The effect of safety maintenance factor, extended service life and convenient use

Inactive Publication Date: 2009-06-24
ANHUI E S ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Method 1 is relatively simple in structure, but no obvious electrical breakpoint can be seen on the site of the inverter. Electrical breakpoints, but still need two separate switch cabinets, the structure is more complicated, and the failure rate is high

Method used

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  • High voltage frequency changer isolation trolley type high voltage switch cabinet
  • High voltage frequency changer isolation trolley type high voltage switch cabinet
  • High voltage frequency changer isolation trolley type high voltage switch cabinet

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Embodiment Construction

[0023] The technical solutions of the present invention will be described in further detail below according to the accompanying drawings.

[0024] like figure 1 Shown is the front panel diagram of the switchgear of the present invention, figure 2 For the front view of the switchgear, image 3 For the left side view of the switchgear, Figure 5 For the rear view of the switch.

[0025] High-voltage inverter isolation trolley switch cabinet, including cabinet, vacuum contactors K1 (38), K2 (6), K3 (21), an isolation trolley including 2 sets of switches (QS1 and QS2) 13, 37, One current transformer 28, three arresters 48, 49, 50, three sensors for live display 45, 46, 47, and a live display device 1. The front door of the cabinet is equipped with a variable frequency operation indicator 4 and a power frequency operation indicator 5 , The lower end of the front door of the cabinet is equipped with a bypass contactor K3 closing button 3 and opening button 4.

[0026] Three-ph...

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Abstract

The invention discloses a switch cabinet which is applied to the input side and the output side of a high-voltage frequency converter; the switch cabinet is characterized in that: a contactor (K1) for controlling the switch of the input side of the high-voltage frequency converter, a contactor (K2) for controlling the switch of the output side thereof and a contactor (K3) for power frequency switching over are arranged in the switch cabinet; two separating trolley type high-voltage separating switches (QS1, QS2) are arranged at the outer sides of the contactor (K1) of the input side and the contactor (K2) of the output side; the two separating trolley type high-voltage separating switches (QS1, QS2) are respectively composed of three fixed contacts and three moving contacts; six pairs of switch contacts can be arranged in a smaller space by adopting the structure; when maintaining the switch cabinet, the trolley is pulled out, and obvious visual break point exists in a high-voltage loop, thus realizing electric isolation between the high-voltage output side and the cabinet output side and the high-voltage frequency conversion and ensuring maintenance work to be safe.

Description

technical field [0001] The invention belongs to the technical field of high-voltage switch cabinets, and in particular relates to a high-voltage inverter isolation trolley-type high-voltage switch cabinet of a high-voltage variable frequency speed regulation system. Background technique [0002] With the rapid development of modern power electronic technology and computer control technology, the technical revolution of electric drive has been promoted. It has become a development trend that AC speed regulation replaces DC speed regulation, and computer digital control replaces analog control. Frequency conversion speed regulation of AC motor is a main means to save electric energy, improve production process, improve product quality and improve operating environment. Variable frequency speed regulation is recognized as the most promising speed regulation method at home and abroad due to its high efficiency, high power factor, and excellent speed regulation and braking perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B11/00H02B11/26
Inventor 陈军陈府王牡丹
Owner ANHUI E S ELECTRIC TECH
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