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ABB UC Series Maintenance Guide
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28
Maintenance guide UCG
|
1ZSE 5492-124 en, Rev 6
Fixed main switching
contact
Conical
spring-
washer
Plain
washer
Plain washer
Connection for transition resistor
Nut
Guide pin
Moving main
switching contact
Fixed transition
contact
Conical spring
washer
Moving transition
contact
Conical spring
washer
Fixed transition
contact
Fig. 15. Diverter switch, contact design.
Plain washer
Locking washer
(mounted vertically
on some types)
27
29
Table of Contents
Default Chapter
6
Table of Contents
6
1 Introduction
9
General
9
Maintenance Schedule
10
Inspection
10
Overhaul
10
Contact Replacement
12
Tightening Torque
12
2 Inspection
13
3 Overhaul
14
Required Tools and Materials
14
Procedure
14
Preparations
14
On-Load Tap-Changer Position
14
Disconnection and Earthing of the Transformer
15
Oil Volumes and Lifting Heights
15
Recommended Set of Spare Parts
15
Oil Testing and Oil Draining
15
Lifting and Cleaning the Diverter Switch
16
Cleaning
17
Cleaning the Diverter Switch Housing
17
Cleaning the Oil Filter in the Conservator Pipe (if Any)
17
Oil Filtration
17
Checking of the Breathing Device
17
Checking the Contact Positions
18
Checking the Contact Wear
20
Checking the Transition Resistors
20
Checking before Closing
20
Installation of the Diverter Switch
20
Checking and Replacing Supervisory Equipment
21
Lubrication of the On-Load Tap-Changer and the Drive Shaft System
22
Checking of the Motor-Drive Mechanism
22
Oil Filling
22
Filling Methods and Restrictions
22
Before Filling
22
Filling at Atmospheric Pressure
22
Oil Level
22
Restoring the Gas Cushion
23
Waiting Period
24
Check of Contact Timing
24
Putting into Operation
24
4 Contact Replacement
27
Dismantling the Boards
29
Dismantling the Moving Main Contacts
29
Dismantling the Moving Transition Contacts
31
Mounting the Moving Transition Contacts
32
Mounting the Moving Main Contacts
33
Replacing the Fixed Main Contacts
34
Replacing the Fixed Transition Contacts
34
Mounting the Boards with Transition Resistors and Fixed Contacts
34
5 Specification of Materials
35
General
35
Diverter Switch Housing
35
Diverter Switch
35
Tap Selectors
35
Conductors
35
Gearing Mechanism
35
Drive Shaft Systems
35
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Repair Guide
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ABB UC Series Specifications
General
Brand
ABB
Model
UC Series
Category
Industrial Equipment
Language
English
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