CN200953277Y

CN200953277Y - High-temperature resisting electric transformer

Info

Publication number: CN200953277Y
Application number: CN 200620078147
Authority: CN
Inventors: 张海宁
Original assignee: China Electric Equipment Group Co Ltd
Current assignee: China Electric Equipment Group Co Ltd
Priority date: 2006-09-08
Filing date: 2006-09-08
Publication date: 2007-09-26
Anticipated expiration: 2016-09-08

Abstract

In order to solve the problem that the traditional oil-immersed power transformer has low degree of insulation heat resistance, easy to age in high temperature and so on, the utility model provides a high temperature-resistant power transformer, which comprises a magnet core, a clamp, an insulative barrel, a winding, a liquid insulation and an oil tank. The clamp clamps the magnet core tightly, the insulative barrel covers the surface of the magnet core; the wound winding covers on the surface of the insulation barrel, the liquid insulation is filled in the oil tank , the turn insulation of the winding is made of NOMEX <*>insulating paper, the liquid insulation is the oil with burning point above 300 degree. The utility model improves the heat resistance degree of transformer insulation to F grade, prolongs the service life of the transformer and improves the power supply quality of the electrical network.

Description

High temperature resistance Power Transformer

Technical field

The utility model relates to a kind of High temperature resistance Power Transformer.

Background technology

Tradition oil-immersed power transformer structure is that the winding of two (or more than two) mutual insulatings is enclosed within on the common iron core, and the coupling by magnetic circuit between them connects each other.Usually the turn insulation of winding adopts paper covered wire or enamelled wire, and other solid insulating material adopts cellulosics, and liquid insulating material adopts mineral oil.The insulation thermal endurance class of transformer is the A level, and winding temperature rise is 65K, and top-oil temperature is upgraded to 60K.

In the tradition oil-immersed power transformer, the turn insulation in general insulating cylinder and the winding is a cellulose insulation paper, and fluid insulation is a cycloalkane mineral oil; Perhaps the turn insulation in insulating cylinder and the winding is NOMEX ^Insulating paper, fluid insulation are cycloalkane mineral oil; Perhaps the turn insulation in insulating cylinder and the winding is a cellulose insulation paper, and fluid insulation is a high ignition point oil.

The insulation thermal endurance class of cellulose insulation paper is the A level, and corresponding heat resisting temperature is 105 ℃; NOMEX ^The thermal endurance class of insulating paper is the C level, and corresponding heat resisting temperature is 220 ℃; Cycloalkane mineral oil flash is 145 ℃, and burning-point is 160 ℃, and maximum operating temperature is 105 ℃; The flash-point of high ignition point oil is 280 ℃, and burning-point is 308 ℃.Therefore the insulation thermal endurance class of traditional oil-immersed power transformer is the A level, because the resistance to extreme temperature of solid insulating material is≤105 ℃, surpass this temperature, these materials will accelerated ageing, thereby produce water and harmfulness gas, these products can reduce the quality of mineral oil, reduce transformer life and break down too early; Therefore when designing, the Transformer Winding temperature must remain on≤and 105 ℃, below winding temperature rise≤65K.

Summary of the invention

The utility model purpose is to address the above problem, and a kind of High temperature resistance Power Transformer is provided, and it can improve the insulation thermal endurance class of transformer, prolongs the service life of transformer, improves the power supply quality of electrical network.

The utility model adopts following technical scheme technical solution problem:

A kind of High temperature resistance Power Transformer, comprise iron core, folder, insulating cylinder, winding, fluid insulation and fuel tank, folder clamps unshakable in one's determination, insulating cylinder is sleeved on outer surface unshakable in one's determination, be sleeved on the outer surface of insulating cylinder after the winding technique, fluid insulation is full of the inside of fuel tank, and the turn insulation of winding is an insulating paper, and fluid insulation is the oil that burning-point is higher than 300 degree.

Compared with prior art, the utlity model has following advantage:

By using NOMEX ^Insulating paper is replaced cellulosic material, high ignition point oil is replaced cycloalkane mineral oil, can eliminate the process that traditional oils becomes insulating material meeting accelerated ageing when surpassing 105 ℃; With the insulation thermal endurance class is the NOMEX of C level ^The rational Match of these two kinds of main insulating material of insulating paper and high ignition point oil has improved the transformer reliability of operation, makes this transformer insulated thermal endurance class become the F level, and the corresponding heat resisting temperature of F level is 155 ℃, and winding temperature rise is 105K, and top-oil temperature is upgraded to 65K.This has prolonged transformer service life, has improved the power supply quality of electrical network.

Description of drawings

Fig. 1 is a High temperature resistance Power Transformer internal structure profile.

Embodiment

As shown in Figure 1, a kind of High temperature resistance Power Transformer comprises iron core 1, folder 2, insulating cylinder 3, winding 4, fluid insulation 5 and fuel tank 6, folder 2 clamps unshakable in one's determination 1, insulating cylinder 3 is sleeved on unshakable in one's determination 1 outer surface, be sleeved on the outer surface of insulating cylinder 3 after winding 4 coilings, fluid insulation 5 is full of the inside of fuel tank 6, and the turn insulation of winding 4 is NOMEX ^Insulating paper, fluid insulation 5 are higher than the oil of 300 degree for burning-point.

This High temperature resistance Power Transformer structure has adopted ripe traditional type transformer device structure, unshakable in one's determination is important components very to transformer electromagnetic performance and mechanical performance, folder is that iron core is played clamping action, and insulating cylinder has surperficial discharge stability and higher anti-electrical strength, and material is NOMEX ^Insulating material; Winding is formed by the lead coiling, and the turn insulation material of lead is NOMEX ^Insulating material, the internal circuit of constitution equipment, fluid insulation are high ignition point oil, transformer are played the effect of heat radiation, insulation, extinguishing arc.

Because it is uneven that the transformer temperature inside distributes, it is determined by the rule in temperature field, actual conditions by temperature field in the transformer, rationally use the insulating material of different temperature resistant grades according to Temperature Distribution, as at transformer body hottest point position, the C class F insulating material F is adopted in the turn insulation of winding and layer insulation, and the F class F insulating material F is adopted in zone that hull-skin temperature is lower such as folder insulation, and the fluid insulation of transformer adopts high ignition point oil.The fluid insulation 5 that is transformer adopts high ignition point oil, and the turn insulation of winding 4 is NOMEX ^Insulating paper, the insulation thermal endurance class of this product can reach the F level, and the heat resisting temperature of insulation thermal endurance class F level correspondence is 155 ℃, winding temperature rise is 105K, top-oil temperature is upgraded to 65K, so the utility model can prolong transformer service life, improves the power supply quality of electrical network.

Claims

1, a kind of High temperature resistance Power Transformer, comprise iron core (1), folder (2), insulating cylinder (3), winding (4), fluid insulation (5) and fuel tank (6), folder (2) clamps (1) unshakable in one's determination, insulating cylinder (3) is sleeved on the outer surface of iron core (1), be sleeved on the outer surface of insulating cylinder (3) after winding (4) coiling, fluid insulation (5) is full of the inside of fuel tank (6), it is characterized in that, the turn insulation of winding (4) is an insulating paper, and fluid insulation (5) is higher than the oil of 300 degree for burning-point.