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Tap grounding apparatus and transformer bushing with same

A technology of transformer bushing and grounding device, applied in transformer/inductor parts, transformer/inductor coil/winding/connection, connection contact material, etc. Problems such as normal reset

Active Publication Date: 2016-04-06
JIANGSU SHENMA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that when the elasticity of the grounding spring is reduced or lost, it will not be able to reset normally, and once the grounding spring or the grounding terminal is broken, damaged, deformed or even loosened and dropped, the staff are often not easy to detect these defects and cannot realize it. The poor grounding of the last screen is a defect that is difficult to find in the operation of the equipment, and often leads to damage accidents of the transformer bushing

Method used

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  • Tap grounding apparatus and transformer bushing with same
  • Tap grounding apparatus and transformer bushing with same
  • Tap grounding apparatus and transformer bushing with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] see figure 1 with figure 2 , the last screen grounding device 100 of the first embodiment of the present invention is installed on the transformer bushing 001 . Transformer bushing 001 includes base flange 010, end screen lead 020, head oil conservator 040, composite bushing 050, capacitor core 060, CT tube 070, oil-in-insulation tube 080, pressure equalizing ball 090 and fixed on the head External terminal 041 on oil conservator 040. The outermost layer of the capacitor core 060 is the last screen 030. Specifically, the last screen grounding device 100 is installed on the base flange 010 .

[0037] Since the transformer bushing 001 in this embodiment is equipped with the above-mentioned last screen grounding device 100, it can ensure effective and reliable grounding during operation and prevent damage accidents.

[0038] see image 3, The last screen grounding device 100 includes a ground base 110 , a ground post 120 , and an insulating base 130 . The base flang...

Embodiment 2

[0054] see Figure 8 , the second embodiment of the present invention is basically the same as the first embodiment. The difference from the first embodiment is that in the end screen grounding device 200 of the second embodiment, the boss 212 is provided with a pin terminal 240 and a grounding post 220 The upper end is provided with a jack 250 .

[0055] The working principle of the last screen grounding device 200 of the second embodiment is basically similar to that of the first embodiment, and will not be repeated here.

Embodiment 3

[0057] see Figure 9 The third embodiment of the present invention is basically the same as the first embodiment, and the difference from the first embodiment is that the end screen grounding device 300 of the third embodiment is not provided with a pressing member.

[0058] In this embodiment, the insulating base 330 is pressed and fixed in the first installation hole 012 through the ground base 310 . Specifically, the ground base 310 is covered on the first installation hole 012, the boss 312 extends into the first installation hole 012, the base 311 is provided with a number of through holes in the circumferential direction, and the end surface of the base flange 013 is provided with a number of corresponding holes. The grounding base 310 and the base flange 013 are fixedly connected by bolts (not shown). At this time, the end face of the boss 312 presses the insulating base 330, thereby pressing and fixing the insulating base 330 in the first mounting hole 012 middle.

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Abstract

The present invention discloses a tap grounding apparatus used for a transformer bushing. The transformer bushing comprises a base flange provided with a first mounting hole; the tap grounding apparatus comprises a grounding seat, a grounding post and an insulating seat; the insulating seat is fixed in the first mounting hole; a second mounting hole is formed in the insulating seat; the grounding post is fixed in the second mounting hole; a grounding seat cover is arranged on the first mounting hole and fixedly connected to the base flange; the upper end of the grounding post is detachably connected to the grounding seat; one of the grounding seat and the grounding post is provided with a pin terminal; and the other of the grounding seat and the grounding post is provided with a jack capable of allowing the pin terminal to be inserted and connected. According to the tap grounding apparatus, the grounding reliability can be effectively improved and a poor grounding situation caused by a defect of a grounding connector can be conveniently discovered; and the tap grounding apparatus is simple in structure and low in manufacturing cost. The present invention also discloses a transformer bushing. The transformer bushing is provided with any tap grounding apparatus.

Description

technical field [0001] The invention relates to a bushing for a power transformer, in particular to an end screen grounding device for a transformer bushing. Background technique [0002] The transformer bushing is the main insulation device outside the transformer box. The lead-out wire of the transformer winding must pass through the insulating bushing to insulate between the lead-out wires and between the lead-out wire and the transformer shell, and at the same time play the role of fixing the lead-out wire. The capacitive transformer bushing is composed of a capacitor core, a composite jacket, and metal accessories. The outermost layer of the capacitor core is the last screen. The last screen must be grounded during operation to ensure that the field strength of the internal capacitor core is evenly distributed. When the bushing is subjected to a high-voltage test, the end screen should be opened to facilitate the measurement of the insulation performance of the bushin...

Claims

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Application Information

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IPC IPC(8): H01F27/00H01R4/66H01F27/32
CPCH01F27/00H01F27/325H01R4/66
Inventor 马斌方江朱兴祥仲留寄汪强
Owner JIANGSU SHENMA ELECTRIC CO LTD
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