CN2655403Y

CN2655403Y - 110KV indoor, outdoor type dry-current transformer

Info

Publication number: CN2655403Y
Application number: CN 200420001947
Authority: CN
Inventors: 于敬宏; 牛传裕
Original assignee: DALIAN JINYE ELECTRIC POWER EQUIPMENT CO LTD
Current assignee: DALIAN JINYE ELECTRIC POWER EQUIPMENT CO LTD
Priority date: 2003-05-15
Filing date: 2004-01-11
Publication date: 2004-11-10
Anticipated expiration: 2014-01-11

Abstract

The utility model discloses a 110kV indoor and outdoor typed dry type circuit transformer comprising a first winding group 1, a second coil 2 and an insulation protection body 6, wherein the outer shape of the insulation protection body 6 is cast to a similar structure with accordance shape after the equipment of the first winding group 1 and the second coil 2. The chain portion of the first winding group 1 and the second coil 2 in the utility model is winded to a rectangle, the brought portion is winded to a straight shape, the second coil 2 is sleeved on the rectangle portion of the first winding group 1, and the insulation distance and the shaped difference between the first winding group 1 and the second coil 2 drive a second coil rack 13 for correct adjustment and positioning by an adjusting bolt 7. The utility model has simple structure, convenient equipment, no oil, total sealing, and free maintenance, which an be directly equipped on a burdening center.

Description

Indoor, the Outdoor Dry-Type Current Transformer of 110kV

Technical field the utility model belongs to the high voltage power transformation equipment in the electric power system, is the crucial signal transmission equipment of electric power system electric energy metrical and relaying protection.

Background technology is present, though the plain edition oil-immersed current transformer both can be used for the indoor open air that also can be used for, because its insulation system is insulating paper and transformer oil compound inslation, volume is big and heavy, and inflammable, contaminated environment should not be directly installed on load center.That Chinese patent ZL 01266910.5 discloses is a kind of " 66kV is indoor, outdoor dry type current transformer "; this current transformer adopts the insulating protector of indoor, the outdoor type epoxy resin of moulding by casting as current transformer; one time winding 1 partly turns to rectangle with secondary coil 2 interlinkages, and the extension coiling is a rectilinear form.It is by changing the coupled position realization of changing-over joint cover, to reach the purpose of conversion current ratio that the serial or parallel connection of a winding connects; Secondary coil 2 is sleeved on the rectangular section of a winding 1, and insulation distance between winding 1 and the secondary coil 2 and shape position error drive secondary coil supports 13 and accurately regulate and locate by regulating bolt 7.Its surface casting becomes cluster parachute corrugated, special-purpose closed terminal box is installed at secondary leading-out terminal place, miniaturization, no oiling, totally-enclosed, non-maintaining, unattended operation have been reached, and can satisfy and expose the requirement of installing in the open, but this instrument transformer is only applicable to the electrical network of 66kV, and can not be used for the electrical network of 110kV.

Summary of the invention the utility model provides a kind of current transformer that can use the safety-type that also can use out of doors indoors of 110kV electric pressure.

The utility model adopts insulating protector 6 indoor, outdoor type epoxy resin is poured into a mould current transformer under vacuum condition; in order to guarantee the creepage distance that compares of product; the insulation protection external surface is made the alternate cluster parachute of multilayer size; what be used for III level gradation for surface pollution environment is 23-27 layer umbrella; what be used for II level gradation for surface pollution environment is 17-21 layer umbrella, and gamp width a is 1.23-1.43 with the ratio of umbellule width b.

Compare with the 66kV current transformer, the utility model main insulating structure c strengthens 1.4～1.6 times, in order to overcome under the high field intensity medium ionization and to overcome the pour mass internal stress, a winding 1 of the present utility model and secondary coil 2 outsourcing padded coamings cushion, coat layer of semiconductor paper screen at the resilient coating outer surface, thereby guaranteed the reliability of the utility model safe operation and electric insulation on the 110kV electrical network.

Description of drawings is done detailed explanation below in conjunction with accompanying drawing to the utility model.

Fig. 1 is a front view of the present utility model.

Fig. 2 is an end view of the present utility model.

Fig. 3 is a vertical view of the present utility model.

Embodiment as shown in Figure 1 and Figure 2, a winding of the present utility model 1 partly turns to rectangle with secondary coil 2 interlinkages, extension then turns to rectilinear form; Secondary coil 2 is sleeved on the rectangular section of a winding 1, and the insulation distance between winding 1 and the secondary coil 2 drives secondary coil supports 13 and accurately regulates and locate by regulating bolt 7.

The utility model adopts outdoor type epoxy resin to pour into a mould the insulating protector 6 of current transformer under vacuum condition; insulating protector 6 outer surfaces are made the alternate full skirt of multilayer size; to increase product along the face creepage distance; what be used for III level gradation for surface pollution is 25 layers of full skirt; what be used for II level gradation for surface pollution is 19 layers of full skirt, and gamp width a is 1.33 with the ratio of umbellule width b.The outer contour shape of insulating protector 6 pour into winding 1 and secondary coil 2 combinations after the corresponding to similar figures structure of shape; be that insulating protector 6 bottoms are elliptical cylinder-shape; top is cylindrical; the cluster parachute shape is also consistent therewith, has received the effect that improves intensity, saves material, reduces cost.Insulating protector 6 top design are conical canopy 12, can prevent from effectively to avenge, near the accumulation of foreign matter such as rain instrument transformer surface and changing-over yoke plate 4, primary connection terminal 5 etc.Both sides, insulating protector 6 bottom pour into the shape of spanner 10, have both strengthened insulation effect, provide convenience to product carrying and installation again.

At insulating protector 6 top installed in front changing-over yoke plate 4 once, the secondary connection box 3 of all-sealed structure is respectively arranged in the both sides, front and back of insulating protector 6 bottoms, make machinery of the present utility model and electric property more safe and reliable.Channel-section steel support 9 is equipped with in the bottom of insulating protector 6, on four jiaos on the support 1 M12 suspension ring 8 is housed respectively, makes transportation of the present utility model, lifting and easier for installation.

Claims

1. indoor, Outdoor Dry-Type Current Transformer of 110kV, comprise by a winding (1), secondary coil (2) and insulating protector (6) and constituting, insulating protector (6) adopts epoxy resin moulding by casting under vacuum condition, a winding (1) partly turns to rectangle with secondary coil (2) interlinkage, the extension coiling is a rectilinear form, it is by changing the coupled position realization of changing-over joint cover, to reach the purpose of conversion current ratio that the serial or parallel connection of a winding connects; Secondary coil (2) is sleeved on the rectangular section of a winding (1), insulation distance between a winding (1) and the secondary coil (2) and shape position error are accurately regulated by adjusting bolt (7) drive secondary coil support (13) and are located, it is characterized in that: the outer surface of insulating protector of the present utility model (6) is made the alternate full skirt of size, what be used for III level gradation for surface pollution is 23-27 layer full skirt, what be used for II level gradation for surface pollution is 17-21 layer full skirt, and gamp width a is 1.23-1.43 with the ratio of umbellule width b; The utility model main insulating structure c strengthens 1.4～1.6 times, and a winding of the present utility model (1) and secondary coil (2) outsourcing resilient coating cushion, and coats layer of semiconductor paper screen at the resilient coating outer surface.