Atlas Copco Qc4003 User manual

Transformer Maintenance
Instruction Manual
English

ATLAS COPCO - PORTABLE ENERGY DIVISION
www.atlascopco.com
Printed matter N°
2954 6170 04
02/2016
Original instructions
Transformer Maintenance

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Warranty and Liability Limitation
Use only authorized parts.
Any damage or malfunction caused by the use of unauthorized parts is not covered by
Warranty or Product Liability.
The manufacturer does not accept any liability for any damage arising from modifications,
additions or conversions made without the manufacturer's approval in writing.
Neglecting maintenance or making changes to the setup of the machine can result in major
hazards, including fire risk.
While every effort has been made to ensure that the information in this manual is correct,
Atlas Copco does not assume responsibility for possible errors.
Copyright 2016, Grupos Electrógenos Europa, S.A.U., Zaragoza, Spain.
Any unauthorized use or copying of the contents or any part thereof is prohibited.
This applies in particular to trademarks, model denominations, part numbers and drawings.

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Transformer Maintenance
Contents
1 Introduction.................................4
2 Transformer Maintenance
Box ...............................................4
2.1 Description .........................................4
2.2 Specifications.....................................4
2.3 Safety precautions.............................5
2.4 Main components..............................5
2.4.1 Display ................................................5
2.4.2 Turn switches .....................................5
2.4.3 Lamp and buzzer ................................5
2.4.4 Voltage connection ............................5
2.4.5 Shutdown ...........................................5
2.4.6 Component overview ........................6
3 Setting Qc4003™ for
transformer maintenance ..........7
4 Before starting ............................9
5 Transformer maintenance
procedure...................................10
5.1 OFF status.........................................10
5.2 Start generator.................................11
5.3 Synchronise the generator..............12
5.4 Deload Mains....................................13
5.5 Island operation ...............................14
5.6 Back synchronisation to the
Mains.................................................15
5.7 Manually restore fuses ....................16
5.8 Deload the generator.......................17
5.9 Stop the generator...........................18
5.10 Settings to increase stability ..........19
5.10.1 PID regulation...................................19
5.10.2 Power factor settings .......................20
5.10.3 Closing settings................................20
6 Voltage mains
measurement............................ 21
6.1 Three-phase measurement .............21
6.2 One-phase measurement ................21
7 Cable and plug connection...... 22
7.1 Cable specifications .........................22
7.2 CAN communication........................22
7.3 Cable overview.................................22
Congratulations on the purchase of your Qc4003™ affiliated Transformer Maintenance Box. It is a solid, safe and reliable tool for transformer maintenance, built
according to the latest technology. Follow the instructions in this booklet and we guarantee you years of troublefree operation. Please read the following instructions
carefully before starting to use your Transformer Maintenance Box.
While every effort has been made to ensure that the information in this manual is correct, Atlas Copco does not assume responsibility for possible errors. Atlas Copco
reserves the right to make changes without prior notice.

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1 Introduction
By introducing the Qc4003™ Transformer
Maintenance application, Atlas Copco offers you the
possibility of performing transformer maintenance
without any power supply interruption for the
consumers.
The main principles of transformer maintenance are:
Take load from the Mains
To repair or to preform service on a transformer, the
Mains should be disconnected.
1. Synchronise the generator with the busbar to
connect to the system.
2. When the generator is synchronised, the generator
breaker will close and the generator takes the load.
3. When the Mains power is zero, the mains breaker
can be switched off or the fuses can be removed.
Back synchronisation to the Mains
1. The generator will synchronise back to the mains.
2. When this static synchronisation is ok, manually
close the mains breaker or connect the fuses.
The generator can be deloaded.
3. After deload, the generator breaker is opened and
the generator stops.
2 Transformer
Maintenance Box
2.1 Description
To facilitate transformer maintenance a Transformer
Maintenance Box (TM-box) has been developped.
The TM-box complies with the demands of a remote
control box and the new flexibility of a maintenance
mobile system.
These demands are:
– Safe maintenance at transformer substations or
other electrical installations
– Interface panel close to the connection points
– No interruptions of power supply for the
consumers
To comply with these demands a TM-box with
following features has been introduced:
– Easy user interface
– Designed to be simple in control
– Step-by-Step sequences
– Visual and audible indication
2.2 Specifications
The TM-box is only to be applied together with a
Qc4003™. The Qc4003™ is a power management
controller, carrying out generator control, supervision
and protection.
Communication between the generator and the TM-
box is established via CAN-communication.