ABB BUE Manual de funcionamiento
Motor-drive mechanisms,
types BUE and BUL2
Maintenance guide
1ZSC000498-ABH en, Rev. 1
Original instruction
The information provided in this document is intended to be general and does not
cover all possible applications. Any specific application not covered should be
referred directly to ABB or its authorized representative.
ABB makes no warranty or representation and assumes no liability for the
accuracy of the information in this document or for the use of such information. All
information in this document is subject to change without notice.
This document must not be copied without our written permission, and the contents
thereof must not be imparted to a third party nor be used for any unauthorized
purpose. Contravention will be prosecuted.
Recommended practices
ABB recommends careful consideration of the following
factors when installing on-load tap-changers:
Before you install or commission a unit, make sure that the
personnel doing the job have read and fully understood the
Installation and commissioning guide provided with the unit.
To avoid damaging the unit, never exceed the operating limits
stated in delivery documents and on rating plates.
Do not alter or modify a unit without first consulting ABB.
Follow local and international wiring regulations at all times.
Use only factory-authorized replacement parts and
procedures.
WARNING, CAUTION and INFO
WARNING
WARNING indicates an imminently hazardous
situation which if not avoided, will result in death or
serious injury. This signal word is to be limited to the
most extreme situations.
WARNING also indicates a potentially hazardous
situation which if not avoided, could result in death or
serious injury.
CAUTION
CAUTION indicates a potentially hazardous situation
which if not avoided, may result in minor or moderate
injury. It may also be used to alert against unsafe
practices.
CAUTION may also indicate property-damage-only
hazards.
INFO provides additional information to assist in
carrying out the work described and to provide
trouble-free operation.
Safety precautions
WARNING
The maintenance guide should be read and
understood before any work is started, and the
procedures in the document should be followed at all
times.
WARNING
Before starting any work inside the motor-drive
mechanism, the auxiliary power must be switched off.
N.B. The motor, the contactors and the heating
element may be energized from separate sources.
During service
WARNING
Small amounts of explosive gas might come out
from the breathing devices (dehydrating breather
or one-way breather). Make sure that no open
fire, hot surfaces or sparks occur in the immediate
surroundings of the breathing devices.
WARNING
If a failure in power supply occurs during operation,
the operation will be completed when the power
returns.
WARNING
The hand crank must not be inserted during electrical
operation.
WARNING
If the tap-changer is not in its exact position and the
hand crank is pulled out, the motor-drive mechanism
will start and run to the exact position if the power
supply is on.
Content
1. Introduction ..........................................................................................................................7
1.1 General ........................................................................................................................7
1.2 Design ..........................................................................................................................7
1.3 Legend .........................................................................................................................7
2. Inspection.............................................................................................................................12
2.1 Required tools and material ..........................................................................................12
2.2 Procedure.....................................................................................................................12
3. Overhaul...............................................................................................................................13
3.1 Required tools and materials.........................................................................................13
3.2 Motor protection ...........................................................................................................13
3.3 Ground fault protector (option) ......................................................................................13
3.4 Counter ........................................................................................................................13
3.5 Heater...........................................................................................................................13
3.6 Toothed belt..................................................................................................................14
3.7 Motor cable connections ..............................................................................................14
3.8 Overhaul type BUE .......................................................................................................14
3.8.1 Disc brake ..............................................................................................................14
3.8.2 Brake for the holding contact..................................................................................15
3.8.3 Position transmitter and other position switches .....................................................15
3.8.4 Lubrication .............................................................................................................15
3.9 Overhaul type BUL2......................................................................................................17
3.9.1 Disc brake ..............................................................................................................17
3.9.2 Position the transmitter and other position switches ...............................................17
3.9.3 Lubrication .............................................................................................................17
3.10 Operation test.............................................................................................................18
4. Specication of materials ......................................................................................................19
1ZSC000498-ABH en, Rev. 1 | Maintenance guide BUE/BUL2 7
1. Introduction
1.1 General
The motor-drive mechanisms, types BUE and BUL2,
manufactured by ABB, have been developed over many years
to provide maximum reliability. The simple and robust design
gives a service life equal to the service life of the transformer.
Minimum maintenance is required for trouble-free operations.
The motor-drive mechanism is attached to the transformer
tank and connected to the on-load tap-changer by means of
drive shafts and a bevel gear.
1.2 Design
The design and layout of the motor-drive mechanisms are
shown in Figs. 1 and 2 (BUE) and Figs. 3 and 4 (BUL2).
1.3 Legend
Towards motor-drive upper limit
Towards motor-drive lower limit
LOCAL control
REMOTE control
8 Maintenance guide BUE/BUL2 | 1ZSC000498-ABH en, Rev. 1
101 4 568 83 2 97 11
12
15
14 13 16
1. Locking device prepared for padlock
2. Emergency stop
3. Air vent
4. LOCAL/REMOTE switch
5. RAISE/LOWER switch
6. Outgoing shaft
7. Lamp (40 W socket E27)
8. Lifting eye
9. Counter
10. Tap-change in progress indicator
11. Position indicator with drag hands for max. and min.
position
12. Shaft for hand crank
13. Protective motor switch
14. Door-operated switch for lamp
15. Hand crank
16. Descriptions and circuit diagram
Fig. 1. Cabinet layout of motor-drive mechanism, type BUE.
1ZSC000498-ABH en, Rev. 1 | Maintenance guide BUE/BUL2 9
Fig. 2. Mechanical design of motor-drive mechanism, type BUE.
Position
transmitter
Contact plate
Brake
Roll pin
Supporting
shaft
Holding contact
Brake disc
Brake block
Brake for holding contact
Cam disc
Motor
Toothed belt
Arm system
Drive roller
One turn shaft
Geneva wheel
10 Maintenance guide BUE/BUL2 | 1ZSC000498-ABH en, Rev. 1
1
12
7
8
9
11
13
6
15
6
16
10
2 14 34 5
1. Position indicator with drag hands for max. and min.
position
2. Tap-change in progress indicator
(Red: in progress, White: in position)
3. Counter
4. Outgoing shaft with multi-hole coupling half
5. Shaft for hand crank
6. Locking device prepared for padlock
7. (Option) Outlet
8. Emergency stop
9. RAISE/LOWER switch
10. LOCAL/REMOTE switch
11. Protective motor switch
12. Air vent
13. Door-operated switch for lamp
14. Lamp
15. Descriptions and circuit diagram
16. Hand crank
Fig. 3. Cabinet layout of motor-drive mechanism, type BUL2.
Este manual sirve para los siguientes modelos
1
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