Bowers PWAP125 Instruction manual

Installation, Operation
& Maintenance Manual
01773 531531 I[email protected] I www.bowerselec.co.uk
2021
Cast Resin &
Earthing Transformers

Tel: [phone] [email protected] www.bowerselec.co.uk
Bowers Group of Companies are proud to be members of:
2

3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
3
CAST RESIN & EARTHING TRANSFORMER
1.0 REFERENCE STANDARDS
2.0 RATING PLATE
3.0 LIST OF COMPONENTS AND ACCESSORIES
4.0 IMPORTANT SAFETY NOTICE
5.0 RECEIVING, HANDLING AND STORING
5.1 RECEIVING
5.2 HANDLING
5.3 STORAGE
6.0 INSTALLATION
6.1 SITE PREPARATION
6.2 STANDARD INSTALLATION CONDITIONS
6.3 WORKING TEMPERATURE
6.4 VENTILATION
6.4.1 NATURAL / FORCED VENTILATION OF THE INSTALLATION ROOM
6.4.2 FORCED VENTILATION OF THE TRANSFORMER
6.5 INSULATION DISTANCES
6.6 SAFETY DISTANCE
6.7 TIGHTENING TORQUE FOR ELECTRICAL & MECHANICAL CONNECTIONS
6.8 VISUAL INSPECTION
6.9 MECHANICAL AND ELECTRICAL CHECKS 1.0 - REFERENCE STANDARDS
6.10 MEASUREMENT OF WINDINGS EARTH RESISTANCE
6.11 EARTHING CONNECTIONS, TAPS AND PROTECTION POSITION
6.12 MV AND LV CONNECTIONS
6.13 TRANSFORMATION RATIO ADJUSTMENT
6.13.1 MV WINDING ADJUSTMENT ON SINGLE VOLTAGE
6.13.1 MV WINDING ADJUSTMENT ON DOUBLE VOLTAGE
Tel: [phone] [email protected] www.bowerselec.co.uk
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
CONTENT

6.14 CONNECTION OF TRANSFORMERS IN PARALLEL
7.0 OVER TEMPERATURE PROTECTION
7.1 ELECTRONIC CONTROLLER FOR PTC SENSORS
7.2 ELECTRONIC CONTROLLER FOR PT100 SENSORS
8.0 OVERLOADING AND SHORT CIRCUIT PROTECTION
9.0 OVER VOLTAGE PROTECTION
10.0
10.1 PERIODIC MAINTENANCE
10.2 MAINTENANCE PRIOR TO RE-ENERGIZING
11.0 GUIDE FOR TROUBLE SHOOTING
12.0 WARRANTY
Tel: [phone] [email protected] www.bowerselec.co.uk
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
4

Starting from 1 July 2015, small, medium and large power transformers placed on the market of the EU Member
States are designed according to Commission Regulation (EU) No 548/2014 of 21 May 2014 on implementing Directive
2009/125/EC of the European Parliament and of the Council.
Tel: [phone] [email protected] www.bowerselec.co.uk
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
Cast resin transformers by Bowers Electricals Ltd, are designed and manufactured in
Conformity with the latest IEC standards currently in force (unless specically agreed otherwise) Directive 2004/108/EC –
Electromagnetic compatibility directive.
IEC 60076-11 Ed.I 2004-05 Power Transformers - Dry Type.
IEC 60076-1 Ed.III 2011-04 Power Transformers - General.
IEC 60076-2 Ed.III 2011-02 Power Transformers – Temperature Rise.
IEC 60076-3 Ed.III 2013-07 Power Transformers – Insulation levels, dielectric test
and external clearances in air.
IEC 60076-4 Ed. I 2002-06 Power Transformers - Guide to lightning impulse
and switching impulse testing.
IEC 60076-5 Ed. IV 2006-02 Power Transformers - Ability to with stand short circuit.
IEC 60076-10 Ed. II 2016-03 Power Transformers – Determination of sound levels.
IEC 61378-1 Ed. II 2011-07 Converter transformers - Part 1:
Transformers for industrial applications.
IEC 61378-2 Ed. II 2011-07 Converter transformers - Part 2:
Transformers for HVDC Application.
1. REFERENCE STANDARDS
2. RATING PLATE
The rating plate reports basic technical parameters and the serial number of the transformer. Depending on the
transformers design and destination, rating plates are prepared according to one of the two samples:
1) EU/548/2014 rating plate for cast resin transformers, for installation
inside the European Union:
5

INSTALLATION, USE AND MAINTENANCE MANUAL
EN
6 7
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
2.0 - RATING PLATE 3.0 - LIST OF COMPONENTS AND ACCESSORIES
IMPORTANT: DESCRIPTIONS AND DRAWINGS PRESENTED IN THIS
MANUAL MAY DIFFER IN ASPECT FROM THE DESIGN DELIVERED.
THEY ARE PROVIDED FOR REFERENCE ONLY AND ARE SUBJECT TO
CHANGE WITHOUT NOTICE.
Figure 3 – Transformer complete with standard accessories
1U
1V
1W
2w
2v
2u
2n
.
13
5
6
7
13
14
12
11
10
8
2
4
9
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
The rating plate reports basic technical parameters and the serial number
of the transformer. Depending on the transformers design and destination,
rating plates are prepared according to one of the two samples:
1) Rating plate for cast resin transformers according to
EU/548/2014 for installation inside the European Union:
2) Rating plate for cast resin transformers according to IEC 60076
for installation outside the European Union:
A transformer consists of MV and LV windings, a magnetic core, clamping
frames and a thermal protection system. If required, it can be equipped
with other ancillary devices.
Figure 1 – Rating plate according to EU/548/2014
Figure 2 – Rating plate for installation outside EU
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
6 7
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
2.0 - RATING PLATE 3.0 - LIST OF COMPONENTS AND ACCESSORIES
IMPORTANT: DESCRIPTIONS AND DRAWINGS PRESENTED IN THIS
MANUAL MAY DIFFER IN ASPECT FROM THE DESIGN DELIVERED.
THEY ARE PROVIDED FOR REFERENCE ONLY AND ARE SUBJECT TO
CHANGE WITHOUT NOTICE.
Figure 3 – Transformer complete with standard accessories
1U
1V
1W
2w
2v
2u
2n
.
13
5
6
7
13
14
12
11
10
8
2
4
9
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
The rating plate reports basic technical parameters and the serial number
of the transformer. Depending on the transformers design and destination,
rating plates are prepared according to one of the two samples:
1) Rating plate for cast resin transformers according to
EU/548/2014 for installation inside the European Union:
2) Rating plate for cast resin transformers according to IEC 60076
for installation outside the European Union:
A transformer consists of MV and LV windings, a magnetic core, clamping
frames and a thermal protection system. If required, it can be equipped
with other ancillary devices.
Figure 1 – Rating plate according to EU/548/2014
Figure 2 – Rating plate for installation outside EU
IMPORTANT: Descriptions and drawings presented in this manual may
dier in aspect from the design delivered. They are provided for reference
only and are subject to change without notice.
2) IEC60076 rating plate for cast resin transformers, for installation outside the European Union:
Tel: [phone] [email protected] www.bowerselec.co.uk
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
2. LIST OF COMPONENTS AND ACCESSORIES
A transformer consists of MV and LV windings, a magnetic core, clamping frames and a thermal protection system. If
required, it can be equipped with other ancillary devices.
6

INSTALLATION, USE AND MAINTENANCE MANUAL
EN
6 7
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
2.0 - RATING PLATE 3.0 - LIST OF COMPONENTS AND ACCESSORIES
IMPORTANT: DESCRIPTIONS AND DRAWINGS PRESENTED IN THIS
MANUAL MAY DIFFER IN ASPECT FROM THE DESIGN DELIVERED.
THEY ARE PROVIDED FOR REFERENCE ONLY AND ARE SUBJECT TO
CHANGE WITHOUT NOTICE.
Figure 3 – Transformer complete with standard accessories
1U
1V
1W
2w
2v
2u
2n
.
13
5
6
7
13
14
12
11
10
8
2
4
9
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
The rating plate reports basic technical parameters and the serial number
of the transformer. Depending on the transformers design and destination,
rating plates are prepared according to one of the two samples:
1) Rating plate for cast resin transformers according to
EU/548/2014 for installation inside the European Union:
2) Rating plate for cast resin transformers according to IEC 60076
for installation outside the European Union:
A transformer consists of MV and LV windings, a magnetic core, clamping
frames and a thermal protection system. If required, it can be equipped
with other ancillary devices.
Figure 1 – Rating plate according to EU/548/2014
Figure 2 – Rating plate for installation outside EU
Tel: [phone] [email protected] www.bowerselec.co.uk
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
STANDARD COMPONENTS AND ACCESSORIES
1. Steel frames
2. Earthing links M12
3. Bi-directional wheels
4. Haulage holes
5. MV regulation tapping
6. Medium voltage windings
7. Low voltage windings
8. Centralisation auxiliary box
9. Rating plate
10. Lifting points
11. Output LV bars
7

12. Magnetic core
13. Winding support blocks
14. Input MV terminals
OPTIONAL COMPONENTS AND ACCESSORIES
• Thermo-controller
• Forced cooling system
• Metallic screen between primary and secondary connected to the ground
• Enclosure (IP 21-54)
• MV and LV cable boxes
• Anti-vibration pads for wheels
For your own safety and to avoid any accidental damage of the transformer, please be sure to read carefully and follow all the
instructions in this manual. The transformer’s technical characteristics specied in the rating plate, such as the rated power and
voltage, must be strictly respected during commissioning and energising. All connection works must be carried out by compe-
tent sta, equipped with all necessary protective devices according to the local safety rules. Please pay attention to proper pro-
tection of the transformer during uploading, positioning, installation and operation. Over voltage and external agents (pollution,
water, sun radiation, plants and animals) may aect the correct operation of the transformer.
5.1 RECEIVING
The transformer is generally supplied fully assembled and ready to be connected to the
medium and low voltage lines. For the purposes of protection, the transformer is wrapped
in polythene lm or packed into a wooden box with moisture absorbers to provide extra
protection against shock, vibrations and excessive dampness, especially for shipping by sea.
On receipt of the transformer, it is necessary to carry out the following checks:
•Check the package and fastenings for signs of damage, which might have occurred during shipping.
•Check the transformer, its parts and accessories for signs of damage, which might have occurred during shipping.
•Check if the characteristics of the transformer detailed in the rating plate coincide with those in the shipping
documents and in the test report attached to the transformer.
• Check if each transformer is complete with the accessories specied in the contract (wheels, thermo-controller, etc.).
In cold weather, to avoid water condensation on the windings, resulting from temperature uctuations during outdoor / indoor
operations of uploading and handling, it is recommended to wait between 8 to 24 hours before unpacking the transformer, so that
it reaches the temperature of the room.
Tel: [phone] [email protected] www.bowerselec.co.uk
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
4. IMPORTANT SAFETY NOTICE
5. RECEIVING, HANDLING AND STORING
8

IMPORTANT: If any defects are found, please contact Bowers
Electricals Ltd immediately. If no notication of inconsistencies
or defects is received within 5 days from the dispatch note, it will be
assumed that the transformer delivery was awless.
Bowers Electricals Ltd cannot be held responsible for any incidents
taking place during installation or service, unless conducted by us.
: 01773 531531 [email protected] www.bowerselec.co.uk
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
5.2 HANDLING
Before commissioning, make sure that the medium voltage coils have not been damaged or displaced during transport or
storage.
For lifting purposes, the upper frame of the transformer is equipped with Four (4) Lifting eyes for slings and shackles. Lift
with a maximum angle of 60° between the slings.
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
10 11
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
IMPORTANT: THE TRANSFORMER MUST NOT BE MOVED BY
PUSHING OR PULLING THE COILS AND CONNECTIONS.
Figure 6 – Wrong manual handling
IMPORTANT: SIGNIFICANT FLUCTUATIONS OF TEMPERATURE
SHOULD BE AVOIDED. IN CASE OF EXCESSIVE HUMIDITY, IT IS
RECOMMENDED TO USE LOCAL HEATERS AND /OR SILICA GEL
MOISTURE ABSORBERS. THE STORAGE TEMPERATURE MUST
NOT BE LOWER THAN -25°C.
60° MAXIMUM
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
5.2 – HANDLING
Before commissioning, make sure that the medium voltage coils have not
been damaged or displaced during transport or storage.
For lifting purposes, the upper frame of the transformer is equipped with
4 lifting eyes for cords. Lift with a maximum angle of 60° between the
cords.
Figure 4 – Handling with overhead-travelling crane
For movement by forklift, the position of the forks under the bottom
clamps should be as far apart as possible. The transformer should be lifted
as low as possible above the floor surface at all times during transfer.
Figure 5 – Correct Handling with forklift
5.3 – STORAGE
The transformer must be stored in a sheltered, clean and dry ambient up
until its commissioning.
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
10 11
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
IMPORTANT: THE TRANSFORMER MUST NOT BE MOVED BY
PUSHING OR PULLING THE COILS AND CONNECTIONS.
Figure 6 – Wrong manual handling
IMPORTANT: SIGNIFICANT FLUCTUATIONS OF TEMPERATURE
SHOULD BE AVOIDED. IN CASE OF EXCESSIVE HUMIDITY, IT IS
RECOMMENDED TO USE LOCAL HEATERS AND /OR SILICA GEL
MOISTURE ABSORBERS. THE STORAGE TEMPERATURE MUST
NOT BE LOWER THAN -25°C.
60° MAXIMUM
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
5.2 – HANDLING
Before commissioning, make sure that the medium voltage coils have not
been damaged or displaced during transport or storage.
For lifting purposes, the upper frame of the transformer is equipped with
4 lifting eyes for cords. Lift with a maximum angle of 60° between the
cords.
Figure 4 – Handling with overhead-travelling crane
For movement by forklift, the position of the forks under the bottom
clamps should be as far apart as possible. The transformer should be lifted
as low as possible above the floor surface at all times during transfer.
Figure 5 – Correct Handling with forklift
5.3 – STORAGE
The transformer must be stored in a sheltered, clean and dry ambient up
until its commissioning.
When moving by forklift, position the forks under the bottom clamps, they should be positioned as far apart as possible. The
transformer should be lifted as low as possible above the oor surface at all times during transfer.
9

IMPORTANT: The transformer must not be moved by pushing
or pulling the coils and connections.
5.3 STORAGE
The transformer must be stored in a sheltered, clean and dry ambient up until its commissioning.
IMPORTANT: Significant temperature fluctuations should
be avoided. In case of excessive humidity, it is recommended to
use local heaters and / or silica gel moisture absorbers.
The storage temperature must not be lower than -25 oc.
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
10 11
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
IMPORTANT: THE TRANSFORMER MUST NOT BE MOVED BY
PUSHING OR PULLING THE COILS AND CONNECTIONS.
Figure 6 – Wrong manual handling
IMPORTANT: SIGNIFICANT FLUCTUATIONS OF TEMPERATURE
SHOULD BE AVOIDED. IN CASE OF EXCESSIVE HUMIDITY, IT IS
RECOMMENDED TO USE LOCAL HEATERS AND /OR SILICA GEL
MOISTURE ABSORBERS. THE STORAGE TEMPERATURE MUST
NOT BE LOWER THAN -25°C.
60° MAXIMUM
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
5.2 – HANDLING
Before commissioning, make sure that the medium voltage coils have not
been damaged or displaced during transport or storage.
For lifting purposes, the upper frame of the transformer is equipped with
4 lifting eyes for cords. Lift with a maximum angle of 60° between the
cords.
Figure 4 – Handling with overhead-travelling crane
For movement by forklift, the position of the forks under the bottom
clamps should be as far apart as possible. The transformer should be lifted
as low as possible above the floor surface at all times during transfer.
Figure 5 – Correct Handling with forklift
5.3 – STORAGE
The transformer must be stored in a sheltered, clean and dry ambient up
until its commissioning.
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
10 11
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
IMPORTANT: THE TRANSFORMER MUST NOT BE MOVED BY
PUSHING OR PULLING THE COILS AND CONNECTIONS.
Figure 6 – Wrong manual handling
IMPORTANT: SIGNIFICANT FLUCTUATIONS OF TEMPERATURE
SHOULD BE AVOIDED. IN CASE OF EXCESSIVE HUMIDITY, IT IS
RECOMMENDED TO USE LOCAL HEATERS AND /OR SILICA GEL
MOISTURE ABSORBERS. THE STORAGE TEMPERATURE MUST
NOT BE LOWER THAN -25°C.
60° MAXIMUM
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
5.2 – HANDLING
Before commissioning, make sure that the medium voltage coils have not
been damaged or displaced during transport or storage.
For lifting purposes, the upper frame of the transformer is equipped with
4 lifting eyes for cords. Lift with a maximum angle of 60° between the
cords.
Figure 4 – Handling with overhead-travelling crane
For movement by forklift, the position of the forks under the bottom
clamps should be as far apart as possible. The transformer should be lifted
as low as possible above the floor surface at all times during transfer.
Figure 5 – Correct Handling with forklift
5.3 – STORAGE
The transformer must be stored in a sheltered, clean and dry ambient up
until its commissioning.
Tel: [phone] [email protected] www.bowerselec.co.uk
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
10 11
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
IMPORTANT: THE TRANSFORMER MUST NOT BE MOVED BY
PUSHING OR PULLING THE COILS AND CONNECTIONS.
Figure 6 – Wrong manual handling
IMPORTANT: SIGNIFICANT FLUCTUATIONS OF TEMPERATURE
SHOULD BE AVOIDED. IN CASE OF EXCESSIVE HUMIDITY, IT IS
RECOMMENDED TO USE LOCAL HEATERS AND /OR SILICA GEL
MOISTURE ABSORBERS. THE STORAGE TEMPERATURE MUST
NOT BE LOWER THAN -25°C.
60° MAXIMUM
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
5.2 – HANDLING
Before commissioning, make sure that the medium voltage coils have not
been damaged or displaced during transport or storage.
For lifting purposes, the upper frame of the transformer is equipped with
4 lifting eyes for cords. Lift with a maximum angle of 60° between the
cords.
Figure 4 – Handling with overhead-travelling crane
For movement by forklift, the position of the forks under the bottom
clamps should be as far apart as possible. The transformer should be lifted
as low as possible above the floor surface at all times during transfer.
Figure 5 – Correct Handling with forklift
5.3 – STORAGE
The transformer must be stored in a sheltered, clean and dry ambient up
until its commissioning.
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
10

INSTALLATION, USE AND MAINTENANCE MANUAL
EN
12 13
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
PADS
MODEL
Ø
[mm]
L
[mm]
W
[mm]
H
[mm]
I1
[mm]
w1
[mm]
ØD
[mm]
thk.
[mm]
Weig
[kg]
Max
Load
[kg]
Max
Com-
press.
PWAP125 < 125 185 70 30 140 45 11 3 0.5 800 2
PWAP200 150-
200
240 105 50 205 72 13 5 1.8 1900 3
6.0 – INSTALLATION Additionally, Bowers Electricals Ltd offers customized low-noise
transformers with very low magnetic induction for installations in
hospitals, universities, school, offices and residences, where silence is a
basic requirement.
6.2 – STANDARD INSTALLATION CONDITIONS
The maximum altitude of installation must not exceed 1000 m above sea
level. When the transformer is in service, the ambient temperature of the
room must be within -25°C ÷ +40°C limits.
INSULATION CLASS RANGE TEMPERATURE
B From -25 to 120°C
F From -25 to 155°C
H From -25 to 180°C
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Installation of the transformer must be done in full compliance with the
applicable local regulations and all work must be carried out by properly
trained and qualified personnel.
6.1 – SITE PREPARATION
The transformer is designed for indoor installation. It should only be
operated in a clean, dust-free environment, protected from direct sunlight,
rain, snow and any kind of contamination.
Ensure that the floor of the room is properly leveled and capable of
supporting the weight of the equipment. Sufficient space should be left
around the perimeter of the transformer to ensure:
• Easy installation, cable connections, inspection and maintenance;
• Adequate natural ventilation (circulation of free cooling air);
• Minimum electrical clearance in line with the local safety standards.
Special attention should be paid to choice of the installation place if noise
level is a factor of particular importance. Sound waves generated by the
transformer during normal operation may be amplified or reflected by the
walls or building structure. Noise level may be reduced by using flexible
terminations and anti-vibration pads
IMPORTANT: If the altitude of the place of installation and/or the
ambient temperature values are higher than the ones specified
above, it should be stated at the ordering stage since these values are
taken into account for transformer design and dimensions.
6.3 – WORKING TEMPERATURE
The maximum altitude of installation must not exceed 1000 m above sea
level. When the transformer is in service, the ambient temperature of the
room must be within -25°C ÷ +40°C limits.
Electric current passing through the windings and magnetizing of the core
are accompanied by certain electrical losses and temperature rise in the
core and windings. The transformer is designed so that natural air cooling
is sufficient to maintain its temperature below the maximum values
foreseen by the standards. In order to avoid temperature accumulation in
the room where the transformer is installed, it is necessary to
provide suitable ventilation. The working temperature of the
transformer depends on its insulation and climatic class as per IEC
60076-11:
Table 1 – Anti-vibration pads parameters
Table 2 - Insulation classes
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
12 13
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
PADS
MODEL
Ø
[mm]
L
[mm]
W
[mm]
H
[mm]
I1
[mm]
w1
[mm]
ØD
[mm]
thk.
[mm]
Weig
[kg]
Max
Load
[kg]
Max
Com-
press.
PWAP125 < 125 185 70 30 140 45 11 3 0.5 800 2
PWAP200 150-
200
240 105 50 205 72 13 5 1.8 1900 3
6.0 – INSTALLATION Additionally, Bowers Electricals Ltd offers customized low-noise
transformers with very low magnetic induction for installations in
hospitals, universities, school, offices and residences, where silence is a
basic requirement.
6.2 – STANDARD INSTALLATION CONDITIONS
The maximum altitude of installation must not exceed 1000 m above sea
level. When the transformer is in service, the ambient temperature of the
room must be within -25°C ÷ +40°C limits.
INSULATION CLASS RANGE TEMPERATURE
B From -25 to 120°C
F From -25 to 155°C
H From -25 to 180°C
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Installation of the transformer must be done in full compliance with the
applicable local regulations and all work must be carried out by properly
trained and qualified personnel.
6.1 – SITE PREPARATION
The transformer is designed for indoor installation. It should only be
operated in a clean, dust-free environment, protected from direct sunlight,
rain, snow and any kind of contamination.
Ensure that the floor of the room is properly leveled and capable of
supporting the weight of the equipment. Sufficient space should be left
around the perimeter of the transformer to ensure:
• Easy installation, cable connections, inspection and maintenance;
• Adequate natural ventilation (circulation of free cooling air);
• Minimum electrical clearance in line with the local safety standards.
Special attention should be paid to choice of the installation place if noise
level is a factor of particular importance. Sound waves generated by the
transformer during normal operation may be amplified or reflected by the
walls or building structure. Noise level may be reduced by using flexible
terminations and anti-vibration pads
IMPORTANT: If the altitude of the place of installation and/or the
ambient temperature values are higher than the ones specified
above, it should be stated at the ordering stage since these values are
taken into account for transformer design and dimensions.
6.3 – WORKING TEMPERATURE
The maximum altitude of installation must not exceed 1000 m above sea
level. When the transformer is in service, the ambient temperature of the
room must be within -25°C ÷ +40°C limits.
Electric current passing through the windings and magnetizing of the core
are accompanied by certain electrical losses and temperature rise in the
core and windings. The transformer is designed so that natural air cooling
is sufficient to maintain its temperature below the maximum values
foreseen by the standards. In order to avoid temperature accumulation in
the room where the transformer is installed, it is necessary to
provide suitable ventilation. The working temperature of the
transformer depends on its insulation and climatic class as per IEC
60076-11:
Table 1 – Anti-vibration pads parameters
Table 2 - Insulation classes
Tel: [phone] [email protected] www.bowerselec.co.uk
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
Weight
6. INSTALLATION
Installation of the transformer must be done in full compliance with the applicable local regulations, all work must be carried
out by properly trained and qualied personnel.
6.1 SITE PREPARATION
The transformer is designed for indoor installation. It should only be operated in a clean, dust-free environment, protected
from direct sunlight, rain, snow and any kind of contamination.
Ensure that the oor of the room is properly levelled and capable of supporting the weight of the equipment. Sucient
space should be left around the perimeter of the transformer to ensure:
•Easy installation, cable connections, inspection and maintenance
• Adequate natural ventilation (circulation of free cooling air)
• Minimum electrical clearance in line with the local safety standards.
Special attention should be paid to choice of the installation place. If noise levels are of particular importance (sound waves
generated by the transformer during normal operation may be amplied or reected by the walls or building structure).
Noise levels may be reduced, by using exible terminations and anti-vibration pads.
Additionally, Bowers Electricals Ltd, oer customised low noise transformers, with very low magnetic induction for installa-
tions in hospitals, universities, schools, oce’s and residences, where low noise operation is a basic requirement.
11

6.3 WORKING TEMPERATURE
Electric current passing through the windings and magnetizing of the core are accompanied by certain electrical losses, and tem-
perature rise in the core and windings. The transformer is designed so that natural air cooling is sucient to maintain its tempera-
ture below the maximum values foreseen by the standards. In order to avoid temperature accumulation in the room where the
transformer is installed, it may be necessary to provide suitable ventilation. The working temperature of the transformer depends
on its insulation, and climatic class as per IEC 60076-11:
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
12 13
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
PADS
MODEL
Ø
[mm]
L
[mm]
W
[mm]
H
[mm]
I1
[mm]
w1
[mm]
ØD
[mm]
thk.
[mm]
Weig
[kg]
Max
Load
[kg]
Max
Com-
press.
PWAP125 < 125 185 70 30 140 45 11 3 0.5 800 2
PWAP200 150-
200
240 105 50 205 72 13 5 1.8 1900 3
6.0 – INSTALLATION Additionally, Bowers Electricals Ltd offers customized low-noise
transformers with very low magnetic induction for installations in
hospitals, universities, school, offices and residences, where silence is a
basic requirement.
6.2 – STANDARD INSTALLATION CONDITIONS
The maximum altitude of installation must not exceed 1000 m above sea
level. When the transformer is in service, the ambient temperature of the
room must be within -25°C ÷ +40°C limits.
INSULATION CLASS RANGE TEMPERATURE
B From -25 to 120°C
F From -25 to 155°C
H From -25 to 180°C
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Installation of the transformer must be done in full compliance with the
applicable local regulations and all work must be carried out by properly
trained and qualified personnel.
6.1 – SITE PREPARATION
The transformer is designed for indoor installation. It should only be
operated in a clean, dust-free environment, protected from direct sunlight,
rain, snow and any kind of contamination.
Ensure that the floor of the room is properly leveled and capable of
supporting the weight of the equipment. Sufficient space should be left
around the perimeter of the transformer to ensure:
• Easy installation, cable connections, inspection and maintenance;
• Adequate natural ventilation (circulation of free cooling air);
• Minimum electrical clearance in line with the local safety standards.
Special attention should be paid to choice of the installation place if noise
level is a factor of particular importance. Sound waves generated by the
transformer during normal operation may be amplified or reflected by the
walls or building structure. Noise level may be reduced by using flexible
terminations and anti-vibration pads
IMPORTANT: If the altitude of the place of installation and/or the
ambient temperature values are higher than the ones specified
above, it should be stated at the ordering stage since these values are
taken into account for transformer design and dimensions.
6.3 – WORKING TEMPERATURE
The maximum altitude of installation must not exceed 1000 m above sea
level. When the transformer is in service, the ambient temperature of the
room must be within -25°C ÷ +40°C limits.
Electric current passing through the windings and magnetizing of the core
are accompanied by certain electrical losses and temperature rise in the
core and windings. The transformer is designed so that natural air cooling
is sufficient to maintain its temperature below the maximum values
foreseen by the standards. In order to avoid temperature accumulation in
the room where the transformer is installed, it is necessary to
provide suitable ventilation. The working temperature of the
transformer depends on its insulation and climatic class as per IEC
60076-11:
Table 1 – Anti-vibration pads parameters
Table 2 - Insulation classes
6.2 STANDARD INSTALLATION CONDITIONS
The maximum altitude of installation must not exceed 1000 metres above sea level. When the transformer is in service, the
ambient temperature of the room must be within -25°C to +40°C limits.
Temperature of cooling medium. The temperature of cooling air at the inlet, to the cooling equipment must not exceed:
40°C at any time / 30°C monthly average of the hottest month / 20°C yearly average
Temperature should not be below:
-25°C for outdoor transformers
-5°C for transformers, where both the transformers, and cooler are intended
for installation indoors.
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
12 13
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
PADS
MODEL
Ø
[mm]
L
[mm]
W
[mm]
H
[mm]
I1
[mm]
w1
[mm]
ØD
[mm]
thk.
[mm]
Weig
[kg]
Max
Load
[kg]
Max
Com-
press.
PWAP125 < 125 185 70 30 140 45 11 3 0.5 800 2
PWAP200 150-
200
240 105 50 205 72 13 5 1.8 1900 3
6.0 – INSTALLATION Additionally, Bowers Electricals Ltd offers customized low-noise
transformers with very low magnetic induction for installations in
hospitals, universities, school, offices and residences, where silence is a
basic requirement.
6.2 – STANDARD INSTALLATION CONDITIONS
The maximum altitude of installation must not exceed 1000 m above sea
level. When the transformer is in service, the ambient temperature of the
room must be within -25°C ÷ +40°C limits.
INSULATION CLASS RANGE TEMPERATURE
B From -25 to 120°C
F From -25 to 155°C
H From -25 to 180°C
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Installation of the transformer must be done in full compliance with the
applicable local regulations and all work must be carried out by properly
trained and qualified personnel.
6.1 – SITE PREPARATION
The transformer is designed for indoor installation. It should only be
operated in a clean, dust-free environment, protected from direct sunlight,
rain, snow and any kind of contamination.
Ensure that the floor of the room is properly leveled and capable of
supporting the weight of the equipment. Sufficient space should be left
around the perimeter of the transformer to ensure:
• Easy installation, cable connections, inspection and maintenance;
• Adequate natural ventilation (circulation of free cooling air);
• Minimum electrical clearance in line with the local safety standards.
Special attention should be paid to choice of the installation place if noise
level is a factor of particular importance. Sound waves generated by the
transformer during normal operation may be amplified or reflected by the
walls or building structure. Noise level may be reduced by using flexible
terminations and anti-vibration pads
IMPORTANT: If the altitude of the place of installation and/or the
ambient temperature values are higher than the ones specified
above, it should be stated at the ordering stage since these values are
taken into account for transformer design and dimensions.
6.3 – WORKING TEMPERATURE
The maximum altitude of installation must not exceed 1000 m above sea
level. When the transformer is in service, the ambient temperature of the
room must be within -25°C ÷ +40°C limits.
Electric current passing through the windings and magnetizing of the core
are accompanied by certain electrical losses and temperature rise in the
core and windings. The transformer is designed so that natural air cooling
is sufficient to maintain its temperature below the maximum values
foreseen by the standards. In order to avoid temperature accumulation in
the room where the transformer is installed, it is necessary to
provide suitable ventilation. The working temperature of the
transformer depends on its insulation and climatic class as per IEC
60076-11:
Table 1 – Anti-vibration pads parameters
Table 2 - Insulation classes
IMPORTANT: If the altitude at the place of installation and/or
the ambient temperature values are higher than the ones specied
above, it should be stated at the ordering stage, since these values
are taken into account for transformer design and dimensions.
Tel: [phone] [email protected] www.bowerselec.co.uk
12

INSTALLATION, USE AND MAINTENANCE MANUAL
EN
14 15
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
A1= P
0,1 x √(Hx(dt)3)
A2= 1,1 x A1
A2
A1
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
For optimal use of the transformer’s full rating, it is essential that the
losses (heat) produced by the core and the windings are effectively
removed. The installation room must be ventilated well in order to
guarantee stable operation and the expected service life of the
transformer. Obstructions around the transformer or close to the
enclosure ventilation openings restricting natural airflow must be avoided.
In order to guarantee standard service conditions and to prevent the
transformer from exceeding its temperature limits, it is necessary to
install air louvers in the installation room. The air louvers must be
located on 2 opposite walls (one in the bottom part and the other in the
upper part) and be big enough to dissipate the heat generated by the
transformer during the service.
Figure 8 – Natural ventilation of the installation room
The minimum size of the openings to guarantee sufficient airflow inside
the installation room (considering average annual temperature of 20°C)
can be calculated using the following formulae:
A1 = lower opening surface (m²)
A2= upper opening surface (m²)
P = total no load losses / load losses at 120°C (kW)
H = difference in height between the top opening and the central line of the
transformer (m)
dT = temperature difference between incoming and outcoming air
temperature of the room (C°)
In case the natural ventilation is not sufficient, the openings may be
equipped with fans in order to increase the airflow inside the installation
room. In air-conditioned rooms, to avoid water condensation and possible
damage of the transformer, it is highly recommended not to blow the fresh
air directly on the transformer.
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
Forced cooling is necessary in the following cases:
• Short-time overloadings
• Low-dimensional room
• Scarcely ventilated room
• Medium daily temperature higher than 30°C
Figure 9 – Forced ventilation of the installation room
A2
A1
6.4 VENTILATION
6.4.1 NATURAL / FORCED VENTILATION OF THE INSTALLATION ROOM
For optimal use of the transformer’s full rating, it is essential that the losses (heat) produced by the core and the windings
are eectively removed. The installation room must be well ventilated, in order to guarantee stable operation throughout the
expected service life of the transformer. Obstructions around the transformer or close to the enclosure ventilation openings,
restricting natural airow, must be avoided.
In order to guarantee standard service conditions, and to prevent the transformer from exceeding its temperature limits, it may
be necessary to install air louvres in the installation room. The air louvres must be located on 2 opposite walls (one in the bottom
part and the other in the upper part) and be big enough to dissipate the heat generated by the transformer during the service.
The minimum size of the openings to guarantee sucient airow inside the installation room (considering average annual
temperature of 20°C) can be calculated using the following formulae:
A1= lower opening surface (m²)
A2= upper opening surface (m²)
P = total no load losses / load losses at 120°C (kW)
H = dierence in height between the top opening and the central line of the transformer (m)
dT = temperature dierence between incoming and outcoming air temperature of the room (C°)
In case the natural ventilation is not sucient, the openings may be equipped with fans in order to increase the airow
inside the installation room. In air-conditioned rooms, to avoid water condensation and possible damage of the transformer,
it is highly recommended not to blow fresh air directly on to the transformer.
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
Tel: [phone] [email protected] www.bowerselec.co.uk
13

6.4.2 FORCED VENTILATION OF THE TRANSFORMER
Forced cooling is necessary in the following cases:
•Short time over loadings
• Small room dimensions
• Scarcely ventilated room
•Average daily temperature higher than 30°C
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
14 15
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
A1= P
0,1 x √(Hx(dt)3)
A2= 1,1 x A1
A2
A1
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
For optimal use of the transformer’s full rating, it is essential that the
losses (heat) produced by the core and the windings are effectively
removed. The installation room must be ventilated well in order to
guarantee stable operation and the expected service life of the
transformer. Obstructions around the transformer or close to the
enclosure ventilation openings restricting natural airflow must be avoided.
In order to guarantee standard service conditions and to prevent the
transformer from exceeding its temperature limits, it is necessary to
install air louvers in the installation room. The air louvers must be
located on 2 opposite walls (one in the bottom part and the other in the
upper part) and be big enough to dissipate the heat generated by the
transformer during the service.
Figure 8 – Natural ventilation of the installation room
The minimum size of the openings to guarantee sufficient airflow inside
the installation room (considering average annual temperature of 20°C)
can be calculated using the following formulae:
A1 = lower opening surface (m²)
A2= upper opening surface (m²)
P = total no load losses / load losses at 120°C (kW)
H = difference in height between the top opening and the central line of the
transformer (m)
dT = temperature difference between incoming and outcoming air
temperature of the room (C°)
In case the natural ventilation is not sufficient, the openings may be
equipped with fans in order to increase the airflow inside the installation
room. In air-conditioned rooms, to avoid water condensation and possible
damage of the transformer, it is highly recommended not to blow the fresh
air directly on the transformer.
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
Forced cooling is necessary in the following cases:
• Short-time overloadings
• Low-dimensional room
• Scarcely ventilated room
• Medium daily temperature higher than 30°C
Figure 9 – Forced ventilation of the installation room
A2
A1
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
It is recommended to use a forced cooling system designed by Bowers Electricals Ltd, (Figure 10)
specially designed to ensure proper air circulation around each coil of a three or single-phase transformer. Forced ventilation
can be designed, and tted before manufacture or after
installation of the transformer at site.
Please consult (Figures 11 and 12 and Table 3) for dierent models capacity and dimensions.
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
16 17
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
It is recommended to use a forced cooling system by Bowers Electricals Ltd
(Figure 10) specially designed to ensure proper air circulation inside each
coil of a three- or single-phase transformer. Forced ventilation can be
fitted at Manufacturer’s works or after installation of the transformer at
site. Please consult Figures 11 and 12 and Table 3 for different models
capacity and dimensions.
Model Power range
(kVA)
���w
(m3/h)
A
(mm)
B
(mm)
C
(mm)
PWF1200/A 50 ~1200 1230 Till 330 225
PWF1200/B 100 – 630 ~1200 1400 340-460 225
PWF1200/C 800 – 1000 ~1200 1600 470-540 225
PWF1800/A 1250 – 1600 ~1800 1850 550-590 405
PWF1800/B 2000 ~1800 2000 600-650 405
PWF3600 2500 – 3150 ~3600 2200 660-730 545
Insula���oltage (kV) Nominal voltage at
industrial frequency (kV)
Atmospheric Impulse
Voltage (kV)
Minimum air
distance (mm)
3,6 10 20 60
40 60
7,2 20 40 70
60 90
12 28 60 90
75 120
17,5 38 75 120
95 160
24 50 95 160
125 220
36 70 145 300
170 360
A
B B
C
170
129
95
A
B B
C
170
129
95
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Table 3 - Forced cooling systems parameters
6.5 – INSULATION DISTANCES
While the transformer is working it is necessary to observe a minimum
distance between the active parts of the transformer, surrounding metal
elements and ancillary devices, according to IEC 60076-3 standard. Table 4
shows the minimum insulation clearances to be respected:
Table 4 - Insulation distances
Figure 10 – Tangential ventilation bar
Figure 11 – Tangential ventilation bar (front view)
Figure 12 – Tangential ventilation bar drawings (top view)
Tel: [phone] [email protected] www.bowerselec.co.uk
14

INSTALLATION, USE AND MAINTENANCE MANUAL
EN
16 17
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
It is recommended to use a forced cooling system by Bowers Electricals Ltd
(Figure 10) specially designed to ensure proper air circulation inside each
coil of a three- or single-phase transformer. Forced ventilation can be
fitted at Manufacturer’s works or after installation of the transformer at
site. Please consult Figures 11 and 12 and Table 3 for different models
capacity and dimensions.
Model Power range
(kVA)
���w
(m3/h)
A
(mm)
B
(mm)
C
(mm)
PWF1200/A 50 ~1200 1230 Till 330 225
PWF1200/B 100 – 630 ~1200 1400 340-460 225
PWF1200/C 800 – 1000 ~1200 1600 470-540 225
PWF1800/A 1250 – 1600 ~1800 1850 550-590 405
PWF1800/B 2000 ~1800 2000 600-650 405
PWF3600 2500 – 3150 ~3600 2200 660-730 545
Insula���oltage (kV) Nominal voltage at
industrial frequency (kV)
Atmospheric Impulse
Voltage (kV)
Minimum air
distance (mm)
3,6 10 20 60
40 60
7,2 20 40 70
60 90
12 28 60 90
75 120
17,5 38 75 120
95 160
24 50 95 160
125 220
36 70 145 300
170 360
A
B B
C
170
129
95
A
BB
C
170
129
95
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Table 3 - Forced cooling systems parameters
6.5 – INSULATION DISTANCES
While the transformer is working it is necessary to observe a minimum
distance between the active parts of the transformer, surrounding metal
elements and ancillary devices, according to IEC 60076-3 standard. Table 4
shows the minimum insulation clearances to be respected:
Table 4 - Insulation distances
Figure 10 – Tangential ventilation bar
Figure 11 – Tangential ventilation bar (front view)
Figure 12 – Tangential ventilation bar drawings (top view)
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
16 17
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
It is recommended to use a forced cooling system by Bowers Electricals Ltd
(Figure 10) specially designed to ensure proper air circulation inside each
coil of a three- or single-phase transformer. Forced ventilation can be
fitted at Manufacturer’s works or after installation of the transformer at
site. Please consult Figures 11 and 12 and Table 3 for different models
capacity and dimensions.
Model Power range
(kVA)
���w
(m3/h)
A
(mm)
B
(mm)
C
(mm)
PWF1200/A 50 ~1200 1230 Till 330 225
PWF1200/B 100 – 630 ~1200 1400 340-460 225
PWF1200/C 800 – 1000 ~1200 1600 470-540 225
PWF1800/A 1250 – 1600 ~1800 1850 550-590 405
PWF1800/B 2000 ~1800 2000 600-650 405
PWF3600 2500 – 3150 ~3600 2200 660-730 545
Insula���oltage (kV) Nominal voltage at
industrial frequency (kV)
Atmospheric Impulse
Voltage (kV)
Minimum air
distance (mm)
3,6 10 20 60
40 60
7,2 20 40 70
60 90
12 28 60 90
75 120
17,5 38 75 120
95 160
24 50 95 160
125 220
36 70 145 300
170 360
A
B B
C
170
129
95
A
B B
C
170
129
95
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Table 3 - Forced cooling systems parameters
6.5 – INSULATION DISTANCES
While the transformer is working it is necessary to observe a minimum
distance between the active parts of the transformer, surrounding metal
elements and ancillary devices, according to IEC 60076-3 standard. Table 4
shows the minimum insulation clearances to be respected:
Table 4 - Insulation distances
Figure 10 – Tangential ventilation bar
Figure 11 – Tangential ventilation bar (front view)
Figure 12 – Tangential ventilation bar drawings (top view)
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
6.5 INSULATION DISTANCES
While the transformer is working it is necessary to observe a minimum distance between the active parts of the transformer,
surrounding metal elements and ancillary devices, according to IEC 60076-3 standard.
Table 4 shows the minimum insulation clearances to be respected:
Tel: [phone] [email protected] www.bowerselec.co.uk
15

INSTALLATION, USE AND MAINTENANCE MANUAL
EN
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
Insula���oltage (kV) Nominal voltage at
industrial frequency (kV)
Atmospheric Impulse
Voltage (kV)
Minimum air
distance (mm)
3,6 10 20 150
40 150
7,2 20 40 150
60 150
12 28 60 150
75 150
17,5 38 75 150
95 200
24 50 95 200
125 280
36 70 145 340
170 400
Bolts
M6 10 /
M8 x23 23
M10 50 40
M12 85 50
M14 130 80
M16 205 125
Table 6 -Tightening torque
*Divide the values by 10 for kgm gauged dynamometrical keys
Bolts
M8 8
M10 9
M12 11
M14 17
M16 21
IMPORTANT: AFTER STORAGE OR A SERVICE INTERRUPTION, IT IS
MANDATORY TO CLEAN THE MV AND LV WINDINGS BY BLOWING
DRY COMPRESSED AIR AND WIPING THEM WITH A DRY CLOTH TO
ELIMINATE ALL DUST AND CONDENSATION BEFORE CONNECTING
THE TRANSFORMER.
IMPORTANT: IT MUST BE REMEMBERED THAT CAST RESIN COILS
HAVE TO BE CONSIDERED A PART UNDER VOLTAGE.
1819
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
6.6 – SAFETY DISTANCE
The transformer must be placed and installed in such way as to avoid any
accidental contact between any person and the live parts of the transformer.
The transformer should be set apart from walls, grids and other external objects
according to the values specified in Table 5, based on the applicable standards.
Table 5 -Safety distances
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL CON-
NECTIONS
All external wirings on LV/MV and earth points must be carried out respecting
minimal insulation clearances, section and position of the cables.
The locking and gripping of all electrical connections and mechanical fastenings
must be performed according to the values indicated in the following tables
6 and 7:
Table 7
*Referred to screws in steel (8,8 type).
Divide the values by 10 for kgm gauged dynamometrical keys
6.8 – VISUAL INSPECTION
Before energizing the unit, it is necessary to make sure that no parts or items
(such as bolts, nuts, washers or other material coming from the surrounding
equipment) are obstructing the channels of the coils or are located in proximity
of active parts, as this could seriously damage the unit.
TIGHTENING TORQUE (Nm)*
Mechanical connection Electrical connection
TIGHTENING TORQUE (Nm)*
8
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
16 17
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
It is recommended to use a forced cooling system by Bowers Electricals Ltd
(Figure 10) specially designed to ensure proper air circulation inside each
coil of a three- or single-phase transformer. Forced ventilation can be
fitted at Manufacturer’s works or after installation of the transformer at
site. Please consult Figures 11 and 12 and Table 3 for different models
capacity and dimensions.
Model Power range
(kVA)
���w
(m3/h)
A
(mm)
B
(mm)
C
(mm)
PWF1200/A 50 ~1200 1230 Till 330 225
PWF1200/B 100 – 630 ~1200 1400 340-460 225
PWF1200/C 800 – 1000 ~1200 1600 470-540 225
PWF1800/A 1250 – 1600 ~1800 1850 550-590 405
PWF1800/B 2000 ~1800 2000 600-650 405
PWF3600 2500 – 3150 ~3600 2200 660-730 545
Insula���oltage (kV) Nominal voltage at
industrial frequency (kV)
Atmospheric Impulse
Voltage (kV)
Minimum air
distance (mm)
3,6 10 20 60
40 60
7,2 20 40 70
60 90
12 28 60 90
75 120
17,5 38 75 120
95 160
24 50 95 160
125 220
36 70 145 300
170 360
A
B B
C
170
129
95
A
B B
C
170
129
95
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Table 3 - Forced cooling systems parameters
6.5 – INSULATION DISTANCES
While the transformer is working it is necessary to observe a minimum
distance between the active parts of the transformer, surrounding metal
elements and ancillary devices, according to IEC 60076-3 standard. Table 4
shows the minimum insulation clearances to be respected:
Table 4 - Insulation distances
Figure 10 – Tangential ventilation bar
Figure 11 – Tangential ventilation bar (front view)
Figure 12 – Tangential ventilation bar drawings (top view)
Insulation
Voltage (KV)
IMPORTANT: It must be remembered that cast resin coils
have to be considered a part under voltage.
6.6 SAFETY DISTANCE
The transformer must be installed in a place with enough surrounding space, as to avoid any accidental contact between
any person, and the live parts of the transformer. The transformer should be set apart from walls, grids and other external
objects according to the values specied in Table 5, based on the applicable standards.
Tel: [phone] [email protected] www.bowerselec.co.uk
16

6.7 TIGHTENING TORQUE FOR ELECTRICAL & MECHANICAL CONNECTIONS
All external wirings on LV / MV and earth points must be carried out respecting minimal insulation clearances, section and
position of the cables. The locking and gripping of all electrical connections and mechanical fastenings must be performed
according to the values indicated in the following tables 6 and 7.
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
Insula���oltage (kV) Nominal voltage at
industrial frequency (kV)
Atmospheric Impulse
Voltage (kV)
Minimum air
distance (mm)
3,6 10 20 150
40 150
7,2 20 40 150
60 150
12 28 60 150
75 150
17,5 38 75 150
95 200
24 50 95 200
125 280
36 70 145 340
170 400
Bolts
M6 10 /
M8 x23 23
M10 50 40
M12 85 50
M14 130 80
M16 205 125
Table 6 -Tightening torque
*Divide the values by 10 for kgm gauged dynamometrical keys
Bolts
M8 8
M10 9
M12 11
M14 17
M16 21
IMPORTANT: AFTER STORAGE OR A SERVICE INTERRUPTION, IT IS
MANDATORY TO CLEAN THE MV AND LV WINDINGS BY BLOWING
DRY COMPRESSED AIR AND WIPING THEM WITH A DRY CLOTH TO
ELIMINATE ALL DUST AND CONDENSATION BEFORE CONNECTING
THE TRANSFORMER.
IMPORTANT: IT MUST BE REMEMBERED THAT CAST RESIN COILS
HAVE TO BE CONSIDERED A PART UNDER VOLTAGE.
1819
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
6.6 – SAFETY DISTANCE
The transformer must be placed and installed in such way as to avoid any
accidental contact between any person and the live parts of the transformer.
The transformer should be set apart from walls, grids and other external objects
according to the values specified in Table 5, based on the applicable standards.
Table 5 -Safety distances
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL CON-
NECTIONS
All external wirings on LV/MV and earth points must be carried out respecting
minimal insulation clearances, section and position of the cables.
The locking and gripping of all electrical connections and mechanical fastenings
must be performed according to the values indicated in the following tables
6 and 7:
Table 7
*Referred to screws in steel (8,8 type).
Divide the values by 10 for kgm gauged dynamometrical keys
6.8 – VISUAL INSPECTION
Before energizing the unit, it is necessary to make sure that no parts or items
(such as bolts, nuts, washers or other material coming from the surrounding
equipment) are obstructing the channels of the coils or are located in proximity
of active parts, as this could seriously damage the unit.
TIGHTENING TORQUE (Nm)*
Mechanical connection Electrical connection
TIGHTENING TORQUE (Nm)*
8
Installation
Voltage (kV)
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
Insula���oltage (kV) Nominal voltage at
industrial frequency (kV)
Atmospheric Impulse
Voltage (kV)
Minimum air
distance (mm)
3,6 10 20 150
40 150
7,2 20 40 150
60 150
12 28 60 150
75 150
17,5 38 75 150
95 200
24 50 95 200
125 280
36 70 145 340
170 400
Bolts
M6 10 /
M8 x23 23
M10 50 40
M12 85 50
M14 130 80
M16 205 125
Table 6 -Tightening torque
*Divide the values by 10 for kgm gauged dynamometrical keys
Bolts
M8 8
M10 9
M12 11
M14 17
M16 21
IMPORTANT: AFTER STORAGE OR A SERVICE INTERRUPTION, IT IS
MANDATORY TO CLEAN THE MV AND LV WINDINGS BY BLOWING
DRY COMPRESSED AIR AND WIPING THEM WITH A DRY CLOTH TO
ELIMINATE ALL DUST AND CONDENSATION BEFORE CONNECTING
THE TRANSFORMER.
IMPORTANT: IT MUST BE REMEMBERED THAT CAST RESIN COILS
HAVE TO BE CONSIDERED A PART UNDER VOLTAGE.
1819
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
6.6 – SAFETY DISTANCE
The transformer must be placed and installed in such way as to avoid any
accidental contact between any person and the live parts of the transformer.
The transformer should be set apart from walls, grids and other external objects
according to the values specified in Table 5, based on the applicable standards.
Table 5 -Safety distances
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL CON-
NECTIONS
All external wirings on LV/MV and earth points must be carried out respecting
minimal insulation clearances, section and position of the cables.
The locking and gripping of all electrical connections and mechanical fastenings
must be performed according to the values indicated in the following tables
6 and 7:
Table 7
*Referred to screws in steel (8,8 type).
Divide the values by 10 for kgm gauged dynamometrical keys
6.8 – VISUAL INSPECTION
Before energizing the unit, it is necessary to make sure that no parts or items
(such as bolts, nuts, washers or other material coming from the surrounding
equipment) are obstructing the channels of the coils or are located in proximity
of active parts, as this could seriously damage the unit.
TIGHTENING TORQUE (Nm)*
Mechanical connection Electrical connection
TIGHTENING TORQUE (Nm)*
8
23 -
Table 6 - Tightening torque, refers to regular screws.
* Divide the values by 10 for Kgm gauged dynamometrical keys.
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17

6.8 VISUAL INSPECTION
Before energizing the unit, it is necessary to make sure that no parts or items (such as bolts, nuts, washers) or other material
coming from the surrounding equipment are obstructing the channels of the coils, or are located in proximity of active parts.
This could seriously damage the unit.
IMPORTANT: After storage or a service interruption, it is
mandatory to clean the MV and LV windings, by blowing dry
compressed air, and wiping them with a dry cloth, to eliminate all
dust and condensation before connecting the Transformer.
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
Insula���oltage (kV) Nominal voltage at
industrial frequency (kV)
Atmospheric Impulse
Voltage (kV)
Minimum air
distance (mm)
3,6 10 20 150
40 150
7,2 20 40 150
60 150
12 28 60 150
75 150
17,5 38 75 150
95 200
24 50 95 200
125 280
36 70 145 340
170 400
Bolts
M6 10 /
M8 x23 23
M10 50 40
M12 85 50
M14 130 80
M16 205 125
Table 6 -Tightening torque
*Divide the values by 10 for kgm gauged dynamometrical keys
Bolts
M8 8
M10 9
M12 11
M14 17
M16 21
IMPORTANT: AFTER STORAGE OR A SERVICE INTERRUPTION, IT IS
MANDATORY TO CLEAN THE MV AND LV WINDINGS BY BLOWING
DRY COMPRESSED AIR AND WIPING THEM WITH A DRY CLOTH TO
ELIMINATE ALL DUST AND CONDENSATION BEFORE CONNECTING
THE TRANSFORMER.
IMPORTANT: IT MUST BE REMEMBERED THAT CAST RESIN COILS
HAVE TO BE CONSIDERED A PART UNDER VOLTAGE.
1819
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
6.6 – SAFETY DISTANCE
The transformer must be placed and installed in such way as to avoid any
accidental contact between any person and the live parts of the transformer.
The transformer should be set apart from walls, grids and other external objects
according to the values specified in Table 5, based on the applicable standards.
Table 5 -Safety distances
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL CON-
NECTIONS
All external wirings on LV/MV and earth points must be carried out respecting
minimal insulation clearances, section and position of the cables.
The locking and gripping of all electrical connections and mechanical fastenings
must be performed according to the values indicated in the following tables
6 and 7:
Table 7
*Referred to screws in steel (8,8 type).
Divide the values by 10 for kgm gauged dynamometrical keys
6.8 – VISUAL INSPECTION
Before energizing the unit, it is necessary to make sure that no parts or items
(such as bolts, nuts, washers or other material coming from the surrounding
equipment) are obstructing the channels of the coils or are located in proximity
of active parts, as this could seriously damage the unit.
TIGHTENING TORQUE (Nm)*
Mechanical connection Electrical connection
TIGHTENING TORQUE (Nm)*
8
Table 7 - Tightening torque, refers to steel screws and self locking bolts.
* Divide the values by 10 for Kgm gauged dynamometrical keys.
* Refers to steel self locking bolts and screw nuts.
6.9 MECHANICAL AND ELECTRICAL CHECKS
Before energizing the unit, an inspection should be carried out in order to guarantee a proper installation and connection of
the transformer.
The following steps must be carefully fullled:
•Clean the MV and LV windings, and the channels from dust by blowing dried compressed air and wiping them with a
dry cloth.
• In case of condensation, pre heat the transformer with a seperate heater to dry out or by energizing at no load.
• Check proper tightening of xing elements of the MV and LV windings, terminal connections and the adjustment
plates.
•Check the position of MV and LV windings. They must be aligned perfectly to the magnetic core.
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18

• Check the tie rods to the core or to the ground.
• Check all the protection devices of the transformer against possible over voltage.
• Check the position of the adjustment plates on the tapping board. This must be the same on all the three MV wind
ings, and must coincide with the specied feeding, and loading voltages. If the voltage is higher than allowed by the tap
ping intake, the no load losses and the noise will be higher.
• Check all the metallic parts to be at a safe insulation distance from all active parts of the transformer.
• It is absolutely forbidden to put metalic parts and /or MV / LV cables in contact with the windings.
• Check proper tightening of the bolts, nuts and tie rods in case the goods have been loaded and unloaded multiple
times during shipping. For proper mechanical tightening.
See information included in Paragraph 6.7 of this manual of use.
IMPORTANT: If the transformer is put into service after a long
storage or de-energized period, it is necessary to clean the MV and LV
windings from dust and condensation with a jet of dry compressed
air and a dry cloth. It is highly recommended to carry out a visual
check of the transformer in order to verify any unlikely presence of
parts on the surface and inside the cooling ducts.
3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
6.10 MEASUREMENT OF WINDINGS EARTH RESISTANCE
Check the general condition of the transformer, and proceed with measurement of the insulation resistance, by means of a
Megger up to 5000 V.
The MV / LV windings must be switched o from the electrical system during the measurement procedure. The measured
values should be close to the following:
• MV terminals / LV terminals grounded >= 20 MΩ
• LV terminals / MV terminals grounded >= 10 MΩ
• LV and MV terminals / ground >= 10 MΩ
If the measured values are much lower, the transformer must by dried. If necessary please contact Bowers Electricals Lim-
ited.
6.11 EARTHING CONNECTIONS, TAPS AND PROTECTION POSITION
The Manufacturer is not responsible for the transformer installation. The installation must be carried out according to the
local standards in force, to the applicable laws, and to the present instructions.
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19

3
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
APPENDIX
1.0 – REFERENCE STANDARDS
2.0 – RATING PLATE
3.0 – LIST OF COMPONENTS AND ACCESSORIES
4.0 – IMPORTANT NOTICE
5.0 – RECEIVING, HANDLING AND STORING
5.1 – RECEIVING
5.2 – HANDLING
5.3 – STORAGE
6.0 – INSTALLATION
6.1 – SITE PREPARATION
6.2 – STANDARD INSTALLATION CONDITIONS
6.3 – WORKING TEMPERATURE
6.4 – VENTILATION
6.4.1 – NATURAL / FORCED VENTILATION OF THE
INSTALLATION ROOM
6.4.2 – FORCED VENTILATION OF THE TRANSFORMER
6.5 – INSULATION DISTANCES
6.6 – SAFETY DISTANCE
6.7 – TIGHTENING TORQUE FOR ELECTRICAL & MECHNICAL
CONNECTIONS
6.8 – VISUAL INSPECTION
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
CAST RESIN TRANSFORMER:
Installation, Operation &
Maintenance Manual
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
22 23
INSTALLATION, USE AND MAINTENANCE MANUAL
EN
Figure 13 – Cables coming from the top Figure 14 – Cables coming from the
��om
MV
MV
LV
LV
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
Bowers Electricals Ltd, Heanor Gate Road, Heanor, Derbyshire DE75 7GX
Telephone: [phone] (24 hours) Fax: [phone]
E-mail: [email protected]
www.bowerselec.co.uk
6.12 – MV AND LV CONNECTIONS
The cables and the bus bars which are connected to the transformer must be
duly fixed to avoid any mechanical stress on the LV and HV transformer
terminals. Both upper and bottom cable connections are acceptable provided
the configuration showed in the Figure 12 and 13 is respected. In case the
connections arrive from the bottom please ensure that there is sufficient depth
for the minimum radius of curvature of the cables.
6.13 – TRANSFORMATION RATIO ADJUSTMENT
When it is necessary to adapt the transformation ratio to the feeding voltage
proceed according to the following instructions:
• Disconnect the unit from the mains on both medium and low voltage
and connect it to the ground;
• Connect the tapping plates in the most suitable position according to the
feeding voltage;
• Re-connect the transformer to the mains.
6.13.1 – MV WINDING ADJUSTMENT ON SINGLE VOLTAGE
If after energizing the primary side of the transformer, the secondary voltage
does not correspond to the rated value it is possible adjust it acting on the
primary winding adding or taking off turns. See Figure 15 for standard
transformer tapping. The plate shown on the right is fitted on the transformer to
indicate the proper position (for example +5% of the primary voltage
corresponds to a variation of -5% in the secondary voltage) The chosen
positions must be identical in all the three phases.
Figure 15 – Tapping regulation with single voltage
6.13.2 – MV WINDING ADJUSTMENT ON DOUBLE VOLTAGE
In case of two primary voltages – e.g. 10-20 kV – adjustment is required on both
parts of the winding. The voltages variation is obtained by putting the windings
in line or parallel as shown in Figure 16.
Figure 16 – Tapping regulation with double voltage
Figure 14 - Cables coming from the bottom.
The following actions must be performed during the installation:
•Connect the earthing conductors to the relative grounding points on the metallic parts of the transformer and enclo-
sure.
• Connect the LV neutral point to earth if required by the protection system.
• Connect the thermal protection relay to the control system according to the thermal protection relay manual.
•Ensure the connection of the primary windings are safely connected.
• Ensure that the voltage regulation taps are safety connected, and if required, modify the position according to the
supply voltage.
• For transformers with double ratio, please ensure that the link corresponding to the voltage of the transformer sys-
tem feeding is properly connected.
6.12 MV AND LV CONNECTIONS
The cables and the bus bars which are connected to the transformer must be duly xed to avoid any mechanical stress on
the LV and HV transformer terminals. Both upper and bottom cable connections are acceptable provided the conguration
showed in the (Figure 12 and 13) is respected. In case the connections arrive from the bottom please ensure that there is suf-
cient depth for the minimum bend radius of curvature of the cables.
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20