CN2591721Y

CN2591721Y - Dry discharge coil

Info

Publication number: CN2591721Y
Application number: CN 03202394
Authority: CN
Inventors: 李会民
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-01-04
Filing date: 2003-01-04
Publication date: 2003-12-10
Anticipated expiration: 2013-01-04

Abstract

The utility model relates to a dry discharge coil. The utility model is composed of a high-voltage binding post, a discharge winding connected with the high-voltage binding post, a low-voltage binding post, a secondary winding connected with the low-voltage binding post, an iron core, a box body, a fixed hanger, a box cover which is provided with the high-voltage binding post and the low-voltage binding post, etc., wherein, the discharge winding, the secondary winding and the iron core is solidified by elastic insulating mediums into an integral body and arranged in the box body. The utility model is suitable for outdoor use or use in a harsh environment without generating a crack performance and has the advantages of little electromagnetic pollution and favorable operation effect no matter in winter, in summer, in the room and out of the room.

Description

The dry type discharge coil

The utility model belongs to AC electric power systems, particularly a kind of closed dry type discharge coil that is generally used for shunt capacitor or the use of filtering capacitor group.

For the power factor that improves system or in current rectifying and wave filtering circuit, all will use capacitor or capacitor group in AC electric power systems, capacitor that uses in the circuit of electric power system or capacitor group capacitance generally speaking are all very big.The residual charge short time that stores in will be with capacitor when circuit overhauls discharges, and its objective is and guarantees equipment and maintainer's safety.Discharge coil commonly used at present mostly is oil immersed type, and this discharge coil is closed in the container that transformer oil is housed, and is immersed in the oil.This oil immersed type discharger volume is big, lay particular stress on, have oil stain, easy to leak, needs often to safeguard.Patent ZL95220536.X and ZL97239501 disclosed " dry type discharge coil " and " totally-enclosed dry type discharge coil " its common trait respectively are that iron core, coil and high pressure line are become one by casting in the epoxy resin of integral sealing; Iron core is column type and does not constitute closure.Because the epoxy resin of this " dry type discharge coil " is different with the thermal coefficient of expansion of iron core, coil and high pressure line, be full of cracks appears in epoxy resin especially easily, thereby not too is fit to outdoor application; Especially in the north than cold district, the limit temperature difference in summer in winter can surpass 80 ℃, summer, sunlight was exposed to the sun, winter is cold unusual, this " dry type discharge coil " more can't be in outdoor application.In addition, because the column type iron core does not constitute closure, the magnetic field direct radiation in the iron core causes electromagnetic pollution to surrounding space in use, particularly easily some precision instruments and equipment is produced interference.

The utility model purpose just provides a kind of dry type discharge coil, have volume little, in light weight, need not characteristics such as oil immersion, good, safe and reliable, the easy care of insulation, particularly more be applicable to and use under outdoor or the adverse circumstances, be difficult for producing electromagnetic pollution.

Dry type discharge coil described in the utility model, comprise high tension terminal and coupled discharge winding, low tension terminal and coupled secondary winding, iron core, casing, fixedly suspension and above the case lid of high tension terminal and low tension terminal is housed, iron core is the multistage column type of shell-type, discharge winding and secondary winding are contained in the center pinch of iron core, and discharge winding, secondary winding and iron core are cured as one with elastic insulated medium and are contained in the casing.

Therefore the utility model has overcome problems such as easily producing be full of cracks when using under outdoor application or the adverse circumstances owing to adopted elastic insulated medium (as silicon rubber etc.) that winding and iron core are cured sealing function with casing.Because iron core itself becomes the closed-loop path, is that the magnetic line of force is limited within the iron core, and is very little to surrounding environment influence.Need not oil-filled in the cabinet space.The model machine of this dry type discharge coil uses proof on Daqing oil field water injection well electric substation power compensating device, no matter winter, summer, indoor, outdoor its effect are very good.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments:

Fig. 1 is the utility model structural representation;

Dry type discharge coil as shown in Figure 1, the top that high tension terminal (1) is contained in high-tension porcelain insulator is connected by lead with discharge winding (3), the top that low tension terminal (2) is contained in the low pressure porcelain vase is connected by lead with secondary winding (4), high-tension porcelain insulator and low pressure porcelain vase be installed in case lid (7) above, iron core (5) is the multistage column type of shell-type, it be by behind " E " type cold-reduced silicon sheet closed assembly two groups constitute relatively, it is that the high strength insulating varniss envelope curve is made and is contained in the center pinch of iron core (5) that discharge winding (3) and secondary winding (4) all adopt, discharge winding (3), secondary winding (4) and iron core (5) with silicon rubber turn to one and by fixing suspension (8) be fixed on case lid (7) below, install additional between case lid (7) and the casing (6) behind the pad by bolt tightening, the lower bottom part of casing (6) is provided with four footing (9) is installed.Secondary winding (4) is mainly used to provide the effect of measurement, control and protection signal.Under operating condition, positive and negative charge will be neutralized by discharge winding (3), in this simultaneously, detect and will induce voltage at the two ends of secondary winding (4), just can grasp discharged condition.Usually within 5 seconds, just voltage can be dropped to below the safe voltage of 50V.

The utility model is applicable to that 6～10kv exchanges in the 50HZ electric power system, and withstand voltage is 42kV; Operating ambient temperature is-45 ℃～+ 45 ℃, and relative humidity is not more than 85%, and discharge time, height above sea level generally was no more than 2000 meters less than 5 seconds.

Claims

1, a kind of dry type discharge coil, comprise high tension terminal (1) and coupled discharge winding (3), low tension terminal (2) and coupled secondary winding (4), iron core (5), casing (6), the case lid (7) of high tension terminal (1) and low tension terminal (2) is housed above fixedly suspension (8) reaches, it is characterized in that iron core (5) is the multistage column type of shell-type, discharge winding (3) and secondary winding (4) are contained in the center pinch of iron core (5), discharge winding (3), secondary winding (4) and iron core (5) are cured as one with elastic insulated medium and are contained in the casing (6).

2, dry type discharge coil as claimed in claim 1, it is characterized in that iron core (5) by fixing suspension (8) be fixed on case lid (7) below.