CN2201716Y

CN2201716Y - Vottage-regulating on-load tapping switch for transformer

Info

Publication number: CN2201716Y
Application number: CN 94244523
Authority: CN
Inventors: 马桂林; 魏国通
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-10
Filing date: 1994-11-10
Publication date: 1995-06-21
Anticipated expiration: 2004-11-10

Abstract

The utility model discloses an improved 35 kv, 110 kv combined type central section voltage-regulating on-load tapping switch for a transformer, comprising a single set of contacts which is composed of a fixed contact fixed on the insulating cylinder of a switch and a moving contact installed on the rotating board of the central rotating shaft of the switch. The fixed contact and the moving contact respectively adopt elastic assemblies. The tapping switch with the single set of contacts type has the advantages of simple structure, small loss and less failure, and enhances the operational reliability of a transformer.

Description

Vottage-regulating on-load tapping switch for transformer

The utility model relates to transformation device, particularly a kind of transformer 35KV, 110KV combined type middle part pressure regulation on load tap changer.

Combined type middle part pressure regulation on load tap changer is the key component that the oil-filled transformer on-load is adjusted voltage, existing insulation level is the complex structure of the transformer of 35KV and 110KV with combined type middle part pressure regulation on load tap changer, and the transformer coil tap must be through a plurality of sets of contacts of shunting switch internal series-connection during by the shunting switch conducting.The contact is many, cost is high, and loss is increased, and the possibility of increase accident generation, thereby has reduced the transformer reliability of operation.

It is simple relatively that the purpose of this utility model provides a kind of structure, and the safe and reliable insulation level of performance is the transformer combined type middle part pressure regulation on load tap changer of 35KV, 110KV.

For finishing transformer 35KV, the 110KV combined type middle part pressure regulation on load tap changer that the invention task designs, form by the moving contact of deciding contact and being fixed on the switch central rotating shaft that is fixed on the switch insulation tube, link to each other with the transformer coil tap, deciding contact is monomer, its terminals pass the switch insulation tube and place outside the insulating cylinder, and its contact jaw places in the insulating cylinder; The moving contact of shunting switch is made up of the spring of two contact chips on the flap that is installed in the switch central rotating shaft and pressing contact chip.

The utility model transformer with 35KV, 110KV combined type middle part pressure regulation on load tap changer owing to decide contact and can be directly contact with moving contact on the switch insulation tube inner main axis flap, existing similar switch reduces the sets of contacts of two series connection, thereby structure is simplified greatly, both reduced manufacturing cost, reduce the loss of electric energy in using, importantly improved the operational reliability of transformer greatly.

As embodiment of the present utility model, the moving contact of shunting switch is made of the spring and the flexible conductor that are installed between switch central rotating shaft and contact and the contact base.

Another embodiment is, the contact jaw of deciding contact of shunting switch is made up of spring between contact base, contact and contact and the contact base and flexible conductor, and moving contact is the monomer that is fixed on the flap of switch central rotating shaft.

Below in conjunction with accompanying drawing the utility model is described.

Fig. 1 is the utility model combined type pressure regulation on load tap changer partial schematic diagram.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is another form elasticity moving contact shunting switch schematic diagram of the utility model embodiment.

Fig. 4 is the utility model embodiment form elasticity moving contact shunting switch schematic diagram again.

As shown in Figure 1 and Figure 2, it respectively is monomer that combined type middle part pressure regulation on load tap changer a plurality of decide contact, each is fixed on the switch insulation tube 3 with nut 2, and the terminals 1 of deciding contact pass insulating cylinder 3 and place outside the insulating cylinder 3, and the contact jaw 4 of deciding contact places in the insulating cylinder 3.The moving contact of shunting switch is made up of the spring 5 of two contact chips 6 on the flap 7 that is installed in switch central rotating shaft 8 and pressing contact chip 6.Two taps as transformer coil are connected to two

terminals

1 and 13 of deciding contact among Fig. 1 respectively, and coil is then via the contact point 14 on the contact chip 6 of deciding contact terminals 1, contact jaw 4, moving contact, contact chip 6, connection sheet 9, the contact chip 10 of another moving contact, another contact jaw of deciding contact 12, terminals 13 conductings.Spring 11 is the assembly of another moving contact.

As shown in Figure 3, the contact of deciding of shunting switch is fixed on the switch insulation tube 3 with nut 2, and its terminals 1 place outside the insulating cylinder 3.The elasticity moving contact of shunting switch is installed in rivet 21 on the flap 7 of switch central rotating shaft 8, and the elasticity moving contact is made up of contact base 20, contact 15, spring 16 and flexible conductor 19, and flexible conductor 19 also connects with connection sheet 9.

As shown in Figure 4, the elasticity of shunting switch is decided contact and is fixed on the switch insulation tube 3 with nut 2, and its terminals 1 place outside the insulating cylinder 3, and its contact head is made up of contact base 22, contact 25, flexible conductor 24, spring 23.The moving contact of shunting switch is a monomer 26, is installed in rivet 27 on the flap 7 of switch central rotating shaft 8, and is connected with connection sheet 28.

Claims

1, a kind of transformer 35KV, 110KV combined type middle part pressure regulation on load tap changer, form by being fixed on the moving contact of deciding contact and being fixed on the switch central rotating shaft that links to each other with the transformer coil tap on the switch insulation tube, it is characterized in that said to decide contact be monomer, its contact jaw places in the insulating cylinder; Said moving contact is made up of the spring of two contact chips on the flap that is installed in the switch central rotating shaft and pressing contact chip.

2, transformer according to claim 1 is with 35KV, 110KV combined type middle part pressure regulation on load tap changer, it is characterized in that said moving contact is made up of spring between the contact base on the flap that is installed in the switch central rotating shaft, contact and contact and the contact base and flexible conductor.

3, transformer according to claim 1 35KV, 110KV combined type middle part pressure regulation on load tap changer, it is characterized in that the said contact jaw of deciding contact places in the insulating cylinder, be made up of spring between contact base, contact and contact and the contact base and flexible conductor, said moving contact is the monomer that is fixed on the flap of switch central rotating shaft.