Application

This is a new three-phase tube-type tap changer,it is combined by the body of tap changer and an operating turning framework,when the transformer is under non-energized state,we can turn over the tap position to change transformer ratio and stabilize ouput voltage.The single phase and "1+2" phase tube-type tap changer are suitable for installation on vertical direction,but the three-phase tube-type product is suitable for vertical or horizontal installation.

These series of products are specially designed for large or medium oil-immersed power transformer,full hermetically transformer or transformers for specially used,they are frequency normally on 50Hz or 60Hz,and suitable for flat type of bell-type oil tank,its highest voltage for equipment is up to 252kV and below,rated current up to 4000A and below.

Feature

 This product has many technical features and owned a certain of national patent right protection.

(1) Simple and lively appearance,reliable structure equipped with solid construct pleces.

(2)Light moment,turn over tap position clearly.The product has technical design features as following:body pieces are restricted each other and functioned each other,you can change the tap position freely and exactly,compared with the same type of products,it has obvious superiority features.

(3) No conductors and switch cover being equipped on the outer body of product.This is a full hermetically outer insulation screen which can withstand high voltage impulse.So no puncture discharge will rise between the narrow gaps,even if the air gap of the tap changer is very near the active body of the transformer.

(4) The inner structure of the tube-type tap changer can be drawn out as a whole part,this helps to installation and maintenance. 

Technical parameters

1.Pipe-form switch(radial line) is equipped with operation mechanism,insulation controlling pole,weiding flange and seal wash,Drum switch(axis line) is equipped without flange.

2.Pipe-form is equipped with an insulation controlling pole of 800mm,and drum switch with a 1200mm one.If ou need a longer one,please indicated in the order.

3.The length of drum tap-changer(pipe-form tap-changer) lead is 700mm,user can specify with exceptive requirements.

4.The applicable lead section:250A:70mm2;400A:120mm2;500A:150mm2;630A:185mm2;800A:240mm2;1000A and up,use with lead user can specify with exceptive requirements.

5.Insulation methods of lead section:insulation cover of drum switch lead is 500mm,one layer-thickness of the cover for 10~35kV transformer lead is 4mm,and 66~110kV 6mm,220kV 10mm,Drum switch is not covered.