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Industrial Equipment
UCC
Repair manual
ABB UCC Repair Manual
On-load tap-changer with motor-drive mechanisms
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Contents
Table of Contents
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Table of Contents
Table of Contents
1 Introduction
General
Repair Categories
Serial Number
Spare Parts List
Maintenance Guide
Tightening Torque
2 Trouble-Shooting
On-Load Tap-Changer
Pressure Relay
Motor-Drive Mechanism
Control System
Power System
Miscellaneous
3 Repairs and Adjustments
Replacement of Gear Box on the On-Load Tap-Changer or Replacement of O-Rings for the Gear Box
General
Tools Required
Material and Spare Parts Required
Procedure
Replacement of Diverter Switch Housing Cover Gasket
General
Tools Required
Material and Spare Parts Required
Procedure
Restoring the Gas Cushion
General
Equipment Required
Procedure
Replacement or Addition of a Multi-Position Switch (BUL Only)
General
Tools Required
Procedure
Examination of the Diverter Switch after a Pressure Relay Trip
Tools and Material Required
Procedure
Tests of the Pressure Relay
Replacement of Pressure Relay
General
Tools Required
Spare Parts Required
Procedure
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1
General
2
On-Load Tap-Changer
3
Motor-Drive Mechanism
4
Control System
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1ZSE 5492-129 en, Rev. 6
On-load tap-changer, type UC with
motor-drive mechanisms, type BUE/BUL
Repair guide
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