Atlas Copco Qc4003 Manual de usuario

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

- 2 -

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.

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.

- 3 -

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.

- 4 -

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.

- 5 -

2.3 Safety precautions

When installing/operating the TM-box, keep

following safety precautions in mind:

Electrostatic discharge awareness

Sufficient care must be taken to protect the terminals

against static discharges during the installation. Once

the unit is installed and connected, these precautions

are no longer necessary.

Safety issues

Installing and operating the unit implies work with

dangerous currents and voltages. Therefore, the

installation should only be carried out by authorised

personnel who understand the risks involved in

working with live electrical equipment.

2.4 Main components

2.4.1 Display

The box contains a display, which has the same

functions as the display mounted directly on the

generator’s Qc4003™. This gives the operator the

possibility to read out the same values from both

displays, such as synchroscope, menus, activity texts,

etc. The display will show different views in each

function step to give the necessary information.

The display on the TM-box is set as secondary

display. The display on the generator remains the

primary display.

Press for 3 seconds and enter password 2003 to

change this setting.

2.4.2 Turn switches

Power set point adjustments are made by means of a

spring return selector switch (4) that returns to zero

when being released.

To select a function, the operator uses a multiposition

‘Function select’ switch (3) that is turned clockwise

in sequential steps to make the generator carry out the

functions indicated until it completes 360 degrees.

Then the generator will stop and it is ready for a new

job cycle.

2.4.3 Lamp and buzzer

The ‘Connect mains’ lamp (2) is activated together

with an internal buzzer as soon as back

synchronisation to the Mains is accomplished.

2.4.4 Voltage connection

Voltage measurements can be quickly and easily

connected directly to the TM-box (5). It is possible to

have a 1- or 3-phase measurement.

2.4.5 Shutdown

The shutdown function is to protect the system.

Pressing the ‘Shutdown’ button (6) will trigger an

emergency stop which will result in loss of power for

the consumer.

The TM-box can be connected or disconnected

without tripping the generator.

Be aware of the hazardous live

currents and voltages. Do not touch

any AC measurement inputs as this

could lead to injury or death.

Be aware that in some cases a second

source may still provide power to the

busbar without giving notice.

- 6 -

2.4.6 Component overview

1Display

2 Connect mains lamp

3 Function select switch

4Powerswitch

5 Voltage measurement point

6 Shutdown button

7 U/F OK LED

Island

Qc4003

LOG

Function select

Deload mains

Start generator

OFF

NL1

Stop

Deload generator

Generator

synchronisation

Power

Voltage mains

Shut down

Connect

mains

Synchronisation to mains

1 7 6

345

- 7 -

3 Setting Qc4003™ for transformer maintenance

Hardware installation

– TM-box

– 2 TM cables (one CAN communication cable and

one cable for 230-400V measurement)

Setting up the Qc4003™ controller

1. Make sure application 1 is selected:

• Go with the JUMP button to parameter 9160.

• Check if A1 (application 1) is active.

If not, activate A1 by pushing ENTER on A1

and select this application with settings

“1 DG” and “1 Mains” (default settings).

2. Set the controller in “Remote Maintenance”

mode:

• Go with the JUMP button to parameter 6070.

• Select genset mode “Remote Maintenance”.

3. Set communication ID:

• Press navigation left, up and right button

together for 3 seconds.

• Enter service password.

•Select‘ID1’.

1 Transformer Maintenance Box (1626 4629 00)

2 Control cable (25 m) (1626 4630 00)

3 Sensing cable (25 m) (1626 4631 00)

Genset 1

X41

X40

Qc4003

LOG

G 0 0 0V

ENTER MENU NO.1 9160

ENTER

Qc4003

LOG

G 0 0 0V

Standard plant

1DG, 1Mains, 0BTB

A1 A2 A3 A4 INACT

Qc4003

LOG

G 0 0 0V

Standard plant

1DG, 1Mains, 0BTB

RESET SELECT

Qc4003

LOG

G 0 0 0V

Standard plant

1DG, 1Mains, 0BTB

A1 A2 A3 A4 ACT

- 8 -

Setting the TM-box display as primary display

1. Set communication ID:

• Press navigation left, up and right button

together for 3 seconds.

• Enter service password.

•Select‘ID2’.

2. Set display priority:

• Press the “view” button for 2 seconds.

• Enter service password.

• Select ‘Priority 1’.

Make sure following actions have been carried

out:

– Remove Earth leakage relay in both units (S13).

– TM Limit relay set at 0sec. (PAR. 5110)

To protect the unit and the load, a

suitable protection installed on the

power cables between the Mains and

the generator should be foreseen by

the end-user.

- 9 -

4 Before starting

1. Adjust following parameter settings

• Parameter 1425: Turn OFF ROCOF.

• Parameter 1434: Turn OFF Vector jump.

• Parameter 6001/6011: Check Frequency from

mains and adjust Nominal setting of the

generator towards it.

• Parameter 6004/6014: Check Voltage from

mains and adjust Nominal setting of the

generator towards it.

• Parameter 6053/6063: If Voltage has been

adjusted, also adjust the Busbar settings to the

same value.

2. Set the diplay of the TM-box as the primary

display (for details see “Setting the TM-box

display as primary display” on page 8).

3. Switch off earth leakage protection S13 inside the

cubicle.

4. Remove the P-link inside the cubicle (check

electrical drawing inside the cubicle).

5. Correct connection of sensing to TM-box.

Measure the rotation of both generator and mains

and connect cables and sensing accordingly.

6. Before backsynchronising check frequency and

voltage of mains and set the generator equal to

mains (parameters 6001/6004/6053 or 6011/6014/

6063).

Following preliminary actions

should be carried out before starting

Transformer Maintenance!

Mains Mains

Generator Generator

SensingSensing

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