Device for preventing reverse charging of secondary side of voltage transformer

A voltage transformer and reverse charging technology, which is applied in the direction of inductors, transformers, switches whose voltage is lower than a predetermined value, etc., can solve the problem that the reverse charging phenomenon of the voltage transformer cannot be completely prevented, and achieves ingenious design and reasonable structure. Effect

Inactive Publication Date: 2014-10-22
STATE GRID CORP OF CHINA +1
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  • Abstract
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Problems solved by technology

[0003] In order to solve the problem that the existing voltage transformer protection technology cannot completely prevent the reverse charging ph

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  • Device for preventing reverse charging of secondary side of voltage transformer

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Embodiment Construction

[0009] The device to prevent the secondary side of the voltage transformer from reverse charging, including the three-phase air switch 1, the first spring 2, the lock rod 3, the support 4, the lever 5, the top rod 6, the bimetal 7, the electric heating element 8, and the reverse charging Snap 9, overcurrent release 10, undervoltage release 11, second spring 12; among them, the right end of the first spring 2 is fixed with the first phase moving contact of the three-phase air switch 1; the lock lever 3 The left side surface is respectively fixed with the first phase moving contact, the second phase moving contact, and the third phase moving contact of the three-phase air switch 1; the right end of the lock lever 3 is provided with a first hook-shaped part; the left end of the lever 5 A second hook-shaped part is provided, and the second hook-shaped part and the first hook-shaped part are mutually hooked; the right end of the lever 5 is hinged to the support 4; the upper end surfa...

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Abstract

The invention relates to voltage transformer protection technology, specifically to a device for preventing reverse charging of a secondary side of a voltage transformer, and solves the problem that existing voltage transformer protection technology cannot completely prevent a reverse charging phenomenon from occurring in a voltage transformer. The device for preventing reverse charging of the secondary side of the voltage transformer includes a three-phase air switch, a first spring, a lock rod, a support, a lever, a top rod, a bimetallic strip, an electric heating element, a reverse charging release, an overcurrent release, an undervoltage release, and a second spring; a right end of the first spring is fixed to a first phase moving contact of the three-phase air switch; a left part side face of the lock rod is fixed to the first phase moving contact, a second phase moving contact and a third phase moving contact of the three-phase air switch; a right end of the lock rod is provided with a first hook-shaped part; a left end of the lever is provided with a second hook-shaped part which are in a clasp joint with the first hook-shaped part; and a right end of the lever is hinged to the support. The device for preventing reverse charging of the secondary side of the voltage transformer in the invention is suitable for a power grid.

Description

Technical field [0001] The invention relates to voltage transformer protection technology, in particular to a device for preventing reverse charging on the secondary side of the voltage transformer. Background technique [0002] Voltage transformer is one of the core equipment of power grid. In practical applications, when the voltage transformer is overhauled after a power failure, the voltage transformer will have a reverse charging phenomenon (that is, the secondary side of the voltage transformer is charged to the primary side), which may cause personal and equipment accidents. Therefore, in order to avoid personal and equipment accidents, the following methods are generally used to prevent reverse charging of voltage transformers: pull open the primary side isolation switch of the voltage transformer, and remove the primary side fuse of the voltage transformer, pull Turn on the secondary side air switch of the voltage transformer, remove the secondary side fuse of the volta...

Claims

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Application Information

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IPC IPC(8): H01H83/20H01H83/12H01F38/24
Inventor 李社勇李爱文马兆斌
Owner STATE GRID CORP OF CHINA
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