CN2052568U

CN2052568U - Variable transformer for load current

Info

Publication number: CN2052568U
Application number: CN 89208866
Authority: CN
Inventors: 韩德武
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-06-22
Filing date: 1989-06-22
Publication date: 1990-02-07

Abstract

The utility model discloses a load voltage regulating transformer, which changes a no load voltage regulating transformer into a load voltage regulating transformer. The utility model solves the technical problem that a no load voltage regulating transformer reforms into a load voltage regulating transformer. The utility model is characterized in that an ordinary horizontal type oil conservator is changed into a vertical type annular oil conservator; the inner cavity of the vertical type vertical type annular oil conservator and the upper end surface of the inner cavity are arranged with on-load tap-changers. The utility model has the advantages of simple structure, high economical benefits, convenient application, etc.

Description

Variable transformer for load current

A kind of on-load tap-changing transformer especially changes No-load changer into load tapchanging transformer.

In electric power system, in order to compensate, equipment is normally moved because of mains fluctuations or load current change the voltage fluctuation that causes, must guarantee the quality of device power supply (DPS).Except that power regulator, itself also has voltage regulation function some power transformer in common voltage stabilizing measure.As No-load changer and on-load voltage regulation.They all can be under the situation of mains fluctuations, by manual, electronic or change the ratio of the former secondary coil number of turn automatically, to guarantee the stability of secondary output voltage.At present, the low capacity voltage regulating transformer mostly is the No-load changer formula, oil-immersed pump transformer of using as the oil field etc.For continuity and the equipment operating efficiency that guarantees to power, need a large amount of on-load tap-changing transformers, but change existing No-load changer transformer with on-load tap-changing transformer, investment is big, is irrealizable at short notice.Though some department adds to a high-power automatic voltage regulator again at the output of No-load changer transformer, to guarantee power supply quality, this has obviously increased the complexity of cost, floor space and the equipment of complete set of equipments.

The utility model purpose designs a kind of novel on-load tap-changing transformer, will be on-load tap-changing transformer than the No-load changer transformer transformation of the way of low capacity with less investment particularly.

The utility model technical solution: because the shunting switch of No-load changer transformer is installed in fuel tank side (as SLZ series) usually, its diameter is compared with the shunting switch with the on-load tap-changing transformer of capacity, is much smaller.Therefore, the transformation of the way of No-load changer transformer is the key of on-load tap-changing transformer, is the riding position of on load tap changer.The utility model is to solve like this: the horizontal oil conservator transformation of the way of common cylindrical drum shape is vertical ring-type oil conservator, and the outer shroud oil storage, upper surface and inner chamber are laid on-load shunting switch.Be that oil conservator can keep original effect on the one hand, it also can be used as the rising seat of shunting switch on the other hand, is used for fixing on load tap changer.Because a lot of on-load tap-changing transformers (as, on-load voltage regulation oil-immersed pump transformer etc.), its voltage-regulation realizes by middle pressure winding tap, and middle pressure winding output voltage generally is no more than 3KV, voltage between tap, promptly step voltage generally is no more than 100V, and the tap voltage between phases is no more than 350V, so this product adopts the on-load voltage regulating switch of 10KV level, the binding post of switch can be immersed in the transformer oil fully.Because vertical ring-type is stored up pure, dry air dielectric in the cabinet inner chamber, can reach the class of insulation of regulation, so the design of this vertical ring-type oil conservator exceeds case lid all the time as long as can guarantee fuel head.

The utility model advantage: 1 directly is on-load tap-changing transformer with the transformation of the way of No-load changer transformer, and small investment, instant effect can be country and save a large amount of fund and raw material.2, the oil conservator of traditional structure communicates with fuel tank by connecting leg, and the transformer oil in the oil conservator is not participated in thermal cycle, and the oil in the vertical ring-type oil conservator is participated in thermal cycle, therefore makes oil tank of transformer increase certain radiating surface, has improved radiating condition.

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

Fig. 1 is the No-load changer transformer schematic appearance before transforming.

Fig. 2 is the utility model (improved on-load tap-changing transformer) schematic appearance.

In Fig. 1,2,1 dehydrating breather, 2 horizontal oil conservators, 3 oil tank walls, 4 no on-load shunting switch, 5 on load tap changeres, 6 case lids, 7 bushings, 8 medium-tension bushings, 9 low-tension bushings, 10 vertical ring-type oil conservators, 11 oil ga(u)ges.In Fig. 2, replace the horizontal oil conservator 2 of Fig. 1 with vertical ring-type oil conservator, and lay on-load shunting switch 5 thereon, the no on-load shunting switch 4 of cancellation Fig. 1.

Claims

A kind ofly change No-load changer into load tapchanging transformer, mainly form by transformer, on-load voltage regulating switch and fuel tank, its feature: change common horizontal oil conservator 2 into vertical ring-type oil conservator 10, and on vertical ring-type oil conservator 10, be mounted with on-load shunting switch 5.