ABB UZE User Manual

Contents
1. Introduction _______________________________________________________9
1.1 Required tools _________________________________________________10
1.2 Required material _______________________________________________10
1.3 Oil ____________________________________________________________11
1.4 Oil conservator _________________________________________________11
1.5 Filter unit for continuous oil ltration ________________________________13
1.6 Weights _______________________________________________________13
1.7 Tightening torque _______________________________________________13
2. Receiving _________________________________________________________14
2.1 Unpacking _____________________________________________________14
2.2 Inspection upon receiving ________________________________________14
2.3 Temporary storage before assembly _______________________________14
3. Drying ____________________________________________________________15
4. Installation on the transformer ________________________________________16
4.1 Attaching the on-load tap-changer to the transformer ________________16
4.1.1 Welding ___________________________________________________16
4.1.2 Bolting ____________________________________________________16
4.1.3 Assembly of accessories _____________________________________18
4.1.4 Retightening _______________________________________________18
4.2 Connection of the regulating winding of the transformer _______________18
4.3 Connection to the oil conservator _________________________________20
5. Pressure relay _____________________________________________________21
5.1 General _______________________________________________________21
5.2 Installation _____________________________________________________21
5.3 Checking when commissioning the transformer _____________________22
6. Oil lling __________________________________________________________23
6.1 Filling methods and restrictions ___________________________________23
6.1.1 Retightening _______________________________________________23
6.2 Filling at atmospheric pressure ____________________________________23
6.3 Filling under vacuum ____________________________________________24
6.4 Correct oil level _________________________________________________24
7. Electrical connection and testing _____________________________________25
7.1 General _______________________________________________________25
7.2 Connecting and testing __________________________________________25
7.3 Electrical tests on transformer ____________________________________26
7.4 After energizing _________________________________________________26
7.5 Resistance measurement ________________________________________26
8. Transport _________________________________________________________27
8.1 Oil level during transport _________________________________________27
8.1.1 Transformer lled with oil _____________________________________27
8.1.2 Transformer drained _________________________________________27

ABB UZE Specifications

General

Brand	ABB
Model	UZE
Category	Industrial Equipment
Language	English