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Fully insulated pluggable voltage transformer for gas insulation switch cabinet

A gas-insulated switch, voltage transformer technology, applied in the direction of inductors, transformers/inductor coils/windings/connections, transformers, etc., can solve problems such as the inability to use fully insulated voltage transformers, and increase reliability and use. The effect of life, stable operation and simple structure

Active Publication Date: 2012-09-05
SHANGHAI PINGGAO TIANLING SWITCHGEAR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fully insulated plug-in voltage transformer for gas insulated switchgear to solve the problem that the existing gas insulated switchgear cannot use a fully insulated voltage transformer

Method used

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  • Fully insulated pluggable voltage transformer for gas insulation switch cabinet
  • Fully insulated pluggable voltage transformer for gas insulation switch cabinet
  • Fully insulated pluggable voltage transformer for gas insulation switch cabinet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 2 As shown, the fully insulated voltage transformer 21 used in this embodiment is the two high-voltage lead-out heads of the primary high-voltage coil, which are an outer cone 12 protruding from the body and an inner cone embedded in the body. A voltage transformer composed of cone head 11. When the fully insulated voltage transformer 21 is assembled with the gas insulated switchgear involved in the utility model, two inner cone bushings 22 need to be arranged on the fully insulated voltage transformer 21 . For this reason, the fully insulated voltage transformer 21 can first install the outer cone head 12 at one end, that is, an inner cone sleeve 22 is directly installed on the outer cone head 12 using a rubber-insulated plug-in connection, and then it can be It is convenient to connect the outer cone head 12 to the high-voltage side or the neutral point side of the power supply through the inner cone sleeve 22 and the spring assembly 23; when installi...

Embodiment 2

[0027] Such as image 3 As shown, the fully insulated voltage transformer 31 used in this embodiment is a voltage composed of two inner cone heads 11 embedded in the voltage transformer body for the two high-voltage leads of the primary high-voltage coil. Transformer. When this fully insulated voltage transformer 31 is connected, it can be connected with reference to the installation method of the inner cone head 11 in Embodiment 1, that is, between the inner cone head 11 and the inner cone bushing 32 at both ends, install a A connecting device, the connecting device can be made up of connecting rod 35, spring assembly 33 at both ends of the connecting rod, and a silicone rubber sleeve 34 on the outside of the connecting rod. The connection method is connected to the silicone rubber sleeve 34 at one end of the connection device, so that the two inner cone heads 11 can be connected to the high voltage side or neutral point side of the power supply through the connection device...

Embodiment 3

[0029] Such as Figure 4 As shown, the fully insulated voltage transformer 41 used in this embodiment is a voltage transformer whose two high-voltage leads of the primary high-voltage coil are composed of two outer cones 12 protruding from the voltage transformer body. device. When this fully insulated voltage transformer 41 is installed, it can be installed with reference to the installation method of the outer cone 12 in Embodiment 1, that is, the inner cone sleeve 42 is directly installed on the outer cone 12 through a rubber-insulated plug-in connection. , so that the outer cone head 12 can be connected to the high voltage side or the neutral point side of the power supply through the inner cone sleeve 42 and the spring assembly 43 .

[0030] This connection method using the double outer cone head 12 can not only greatly reduce the workload of installing the voltage transformer during installation, but also can withstand the rated ground insulation level at both ends of t...

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PUM

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Abstract

The invention discloses a fully insulated pluggable voltage transformer for a gas insulation switch cabinet, which comprises a voltage transformer body, wherein a first outlet head and a second outlet head are arranged on a primary high voltage coil on the voltage transformer body, and the first outlet head and the second outlet head are respectively connected to a high voltage side or a neutral point side of a power supply through an inner conic bushing. The voltage transformer adopts a simple structure, and can be conveniently used on various gas insulation switch cabinets. Installation hidden trouble is eliminated. Meanwhile, higher wire voltage and overvoltage in the voltage transformer can be better tolerated, the influence of the failure of the voltage transformer on the whole electric system is reduced, and the problem that the single wiring method of the gas insulation switch cabinet and the pluggable voltage transformer is better solved.

Description

technical field [0001] The invention relates to a voltage transformer, in particular to a fully insulated plug-in voltage transformer for a gas insulated switch cabinet. Background technique [0002] For a long time, most systems below 35KV in my country have adopted the neutral point ungrounded operation mode. When the system is phase-to-ground, this operation mode allows a certain period of time to operate with faults, thus greatly improving the power supply reliability of the system. With the expansion of power grids in urban and rural load concentration areas and the development of power grids in individual small load areas, the capacitance of the system to ground also increases rapidly. When a certain disturbance occurs in the system, it is very easy to cause resonant overvoltage in the system, resulting in intermittent grounding of the system, blown high-voltage fuses and burnt out of the main body, and in severe cases, equipment tripping accidents occur. Therefore, co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F38/24H01F27/29H02B1/04
Inventor 钱立骁曹叶飞
Owner SHANGHAI PINGGAO TIANLING SWITCHGEAR CO LTD