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Graded insulating neutral point integrated sealing clearance device of power transformer

A technology for power transformers and gap sealing, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as large lateral area, electrode occupation, gap short circuit, etc., achieve good ablation resistance, improve accuracy, and small contact resistance Effect

Active Publication Date: 2013-04-10
LUOHE POWER SUPPLY OF HENAN ELECTRIC POWER CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the gap is exposed to the outdoors, it is easy to be accidentally touched by foreign objects such as insects, birds or rain, causing a short circuit in the gap, resulting in misoperation of the protection
At the same time, the electrodes fixed at both ends of the composite insulator occupy a large lateral area and can only be used as a protective gap

Method used

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  • Graded insulating neutral point integrated sealing clearance device of power transformer
  • Graded insulating neutral point integrated sealing clearance device of power transformer
  • Graded insulating neutral point integrated sealing clearance device of power transformer

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Embodiment Construction

[0028] According to the industry custom, the power transformer graded insulation neutral point integrated sealing gap device provided by the present invention can also be called the power transformer graded insulation neutral point integrated sealing gap. The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0029] figure 1 The structural block diagram of the integrated sealing gap device for the graded insulation neutral point of the power transformer is given, and its connection relations and functions are as follows.

[0030] The contact (1), the transmission mechanism (2), the motor (3), the motor control circuit (5), the device control circuit (6) and the operation panel (7) are sequentially connected, that is, the contact (1) and the transmission mechanism ( 2) connected, the motor (3) is connected with the transmission mechanism (2) and the motor control circuit (5) respectively, and the de...

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Abstract

The invention discloses a graded insulating neutral point integrated sealing clearance device of a power transformer, comprising a contact (1), a driving mechanism (2), a motor (3), a zero sequence current transducer (4) and a motor control circuit (5). The graded insulating neutral point integrated sealing clearance device is characterized by being provided with a device control circuit (6) and an operation panel (7), wherein a control element in the device control circuit (6) is provided outwards through the operation panel (7); the contact (1), the driving mechanism (3), the motor control circuit (5), the device control circuit (6) and the operation panel (7) are sequentially connected; the contact (1) directly passes through the center of the zero sequence current transducer (4) whichis connected with the operation panel (7) through a cable; and the motor control circuit (5) is connected with the operation panel (7). The invention has the functions of protecting the clearance andan earthed switch and the advantages of integral encapsulation, simple structure, accurate action and automatic operation.

Description

technical field [0001] The invention relates to the field of overvoltage protection for a neutral point of a power system transformer, in particular to an integrated sealing gap device for a graded insulation neutral point of a power transformer, which is suitable for overvoltage protection for an ungrounded neutral point of a transformer. Background technique [0002] The voltage in the power supply network is very high, and the neutral point is usually directly grounded. Due to the requirements of relay protection setting configuration and communication interference prevention, in order to limit the single-phase short-circuit current, some transformers use the neutral point ungrounded method. . In this mode of operation, the overvoltage at the neutral point will be caused by lightning strikes, single-phase grounding short-circuit faults, etc., and most of the transformers are graded insulation, so the overvoltage poses a great threat to the insulation of the neutral point,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/04
Inventor 周文俊马心良喻剑辉韩晋平劳斯佳黄燕李小陆
Owner LUOHE POWER SUPPLY OF HENAN ELECTRIC POWER CORP
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