Megger Centrix 3 User manual

1
Centrix 3
Centrally Controlled Test Van System
USER GUIDE
Issue: D (11/2021) - EN
Article number: 85689

2

Consultation with Megger
3
Consultation with Megger
The present system manual has been designed as an operating guide and for
reference. It is meant to answer your questions and solve your problems in as fast and
easy a way as possible. Please start with referring to this manual should any trouble
occur.
In doing so, make use of the table of contents and read the relevant paragraph with
great attention. Furthermore, check all terminals and connections of the instruments
involved.
Should any question remain unanswered or should you need the help of an authorized
service station, please contact:
Megger Limited Megger Germany GmbH (Baunach)
Archcliffe Road
Kent CT17 9EN
T: [phone]
F: [phone]
E: [e-mail]
Dr.-Herbert-Iann-Str. 6
D - 96148 Baunach
T: [phone] – 0
F: [phone]
E: [e-mail]
Megger Germany GmbH (Radeburg) Megger USA
Röderaue 41
D - 01471 Radeburg / Dresden
T: [phone] – 0
F: [phone]
E: [e-mail]
Valley Forge Corporate Centre
2621 Van Buren Avenue
Norristown, PA 19403 USA
T: [phone]
F: [phone]
Megger
All rights reserved. No part of this handbook may be copied by photographic or other means unless Megger
have before-hand declared their consent in writing. The content of this handbook is subject to change without
notice. Megger cannot be made liable for technical or printing errors or shortcomings of this handbook.
Megger also disclaims all responsibility for damage resulting directly or indirectly from the delivery, supply, or
use of this matter.

Terms of Warranty
4
Terms of Warranty
Megger accept responsibility for a claim under warranty brought forward by a customer
for a product sold by Megger under the terms stated below.
Megger warrant that at the time of delivery Megger products are free from manufacturing
or material defects which might considerably reduce their value or usability. This
warranty does not apply to faults in the software supplied. During the period of warranty,
Megger agree to repair faulty parts or replace them with new parts or parts as new (with
the same usability and life as new parts) according to their choice.
This warranty does not cover wear parts, lamps, fuses, batteries and accumulators.
Megger reject all further claims under warranty, in particular those from consequential
damage. Each component and product replaced in accordance with this warranty
becomes the property of Megger.
All warranty claims versus Megger are hereby limited to a period of 12 months from the
date of delivery. Each component supplied by Megger within the context of warranty will
also be covered by this warranty for the remaining period of time but for 90 days at
least.
Each measure to remedy a claim under warranty shall exclusively be carried out by
Megger or an authorized service station.
This warranty does not apply to any fault or damage caused by exposing a product to
conditions not in accordance with this specification, by storing, transporting, or using it
improperly, or having it serviced or installed by a workshop not authorized by Megger.
All responsibility is disclaimed for damage due to wear, will of God, or connection to
foreign components.
For damage resulting from a violation of their duty to repair or re-supply items, Megger
can be made liable only in case of severe negligence or intention. Any liability for slight
negligence is disclaimed.
Since some states do not allow the exclusion or limitation of an implied warranty or of
consequential damage, the limitations of liability described above perhaps may not
apply to you.

Contents
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Contents
Consultation with Megger.......................................................................................... 3
Terms of Warranty...................................................................................................... 4
Contents ..................................................................................................................... 5
1Safety Instructions ...................................................................................... 8
1.1 General Notes ............................................................................................... 8
1.2 General Safety Instructions and Warnings ..................................................... 9
2Technical description.................................................................................11
2.1 Description ...................................................................................................11
2.2 Technical data ..............................................................................................14
2.3 Operating unit...............................................................................................23
3Putting the test van into operation ............................................................25
3.1 Securing the area .........................................................................................25
3.2 Electrical connection.....................................................................................26
3.2.1 Connection technology .................................................................................27
3.2.2 Connection of the earth cable .......................................................................28
3.2.3 Connection of the FU cable (auxiliary earth)..................................................29
3.2.4 Connection to the test object.........................................................................30
3.2.4.1 Using the HV connection cable .....................................................................30
3.2.4.2 Using the three-phase LV cable (optional).....................................................35
3.2.4.3 Using the MFM/HVB connection cable (optional)...........................................36
3.2.5 Connecting the power cable..........................................................................37
3.2.6 Connection of the external safety device.......................................................38
3.3 Connect USB accessories ............................................................................40
3.4 Setting up switch-on standby ........................................................................41
3.5 Switching on the test van ..............................................................................41
3.6 High voltage control......................................................................................42
4Basics of operation ....................................................................................43
4.1 Screen layout ...............................................................................................43
4.2 Basics of control system ...............................................................................46
4.3 Quick selection of operating modes – ...................................................49
4.4 Phase selection - ..................................................................................50
4.5 History database - ................................................................................52
4.6 System settings - ....................................................................................55
4.6.1 Data menu - .............................................................................................57
4.6.2 Basic settings - ........................................................................................58
4.6.3 Enabling remote control and remote access (optional) - .............................61
4.6.4 Remote control via app.................................................................................61

Contents
6
4.6.5 Remote access via TeamViewer software.....................................................66
4.6.6 Administration menu - (administration password required).......................67
4.6.6.1 Backing up and updating data - | ......................................................68
4.6.6.2 User administration - ..............................................................................69
4.6.6.3 Connection Lead Calibration - ..................................................................70
4.7 MeggerBook Cable protocol software - ..................................................71
5Conducting measurements........................................................................72
5.1 Selecting the cable .......................................................................................72
5.2 Good to know …...........................................................................................72
5.2.1 Propagation velocity .....................................................................................72
5.2.2 Pulse width...................................................................................................73
5.2.3 Typical TDR reflectograms............................................................................74
5.3 Standard functions........................................................................................75
5.4 Systematics of cable fault location ................................................................78
5.5 Insulation test - ........................................................................................79
5.5.1 Measurement of insulation resistance and test object capacitance ................79
5.5.2 Time-dependent measurement of resistance - ........................................82
5.6 Cable testing - ........................................................................................84
5.6.1 Sheath test and sheath fault pinpointing........................................................88
5.6.1.1 Testing a cable sheath - .........................................................................89
5.6.1.2 Pinpointing a sheath fault - ....................................................................91
5.6.2 Measuring with the MFM 10/HVB 10 or other supplied test equipment - ..93
5.6.3 Measuring at the external sockets — .....................................................93
5.7 Pulse reflection measurement (TDR) - ...................................................94
5.8 Pre-location of high-resistance cable faults - .........................................97
5.8.1 Arc reflection measurement (ARM) - ......................................................97
5.8.2 ARM Conditioning - ...............................................................................101
5.8.3 ARM Plus - (optional)...........................................................................103
5.8.4 DECAY Plus - (optional) ......................................................................105
5.8.5 ARM burning - / (optional) ...............................................................107
5.8.6 Voltage decoupling (DECAY) - .............................................................109
5.8.7 Current decoupling (ICE) - ...................................................................111
5.8.8 Three-phase current decoupling (optional) - .........................................114
5.9 Fault conversion - .................................................................................118
5.9.1 Burning - / ......................................................................................118
5.9.2 AC burning - (optional)..........................................................................120
5.10 Fault pinpointing - ................................................................................122
5.10.1 Surge pinpointing - / .......................................................................122
5.10.2 Line and fault location with the audio frequency generator ..........................125
5.11 Dielectric diagnosis (optional) .....................................................................128

Contents
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5.11.1 Withstand voltage diagnosis .......................................................................130
5.11.2 Tan delta step test ......................................................................................134
5.11.2.1 Preparing the step test................................................................................134
5.11.2.2 Performing the step test..............................................................................137
5.11.2.3 Automatic evaluation of the test results.......................................................141
5.11.2.4 Setting your own evaluation criteria.............................................................142
5.11.2.5 Manual evaluation of the test results...........................................................144
5.11.2.6 Processing the measured data....................................................................146
5.12 Partial discharge diagnosis (optional)..........................................................147
6Completing the work ................................................................................148
7Care, Maintenance and Troubleshooting ................................................149
7.1 Behaviour at Malfunction of Normal Operation ............................................149
7.2 Maintenance work you can carry out yourself..............................................151
7.3 Required maintenance by a service centre..................................................152
7.4 SIM card replacement and troubleshooting at the 4G / GPS router (optional)
...................................................................................................................153
8Appendix 1: Control via notebook ...........................................................155

Safety Instructions
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1Safety Instructions
1.1 General Notes
This manual contains basic instructions for the commissioning and operation of the
device / system. For this reason, it is important to ensure that the manual is always
available to the authorised and trained operator. He needs to read the manual
thoroughly. The manufacturer is not liable for damage to material or humans due to non-
observance of the instructions and safety advices provided by this manual.
Locally applying regulations have to be observed!
The following signal words and symbols are used in this manual and on the product
itself:
Signal word /
symbol
Description
DANGER Indicates a potential hazard which will result in death or serious
injury if not avoided.
WARNING Indicates a potential hazard which may result in death or serious
injury if not avoided.
CAUTION Indicates a potential hazard which may result in moderate or
minor injury if not avoided.
NOTICE Indicates a potential hazard which may result in material damage
if not avoided.
Serves to highlight warnings and safety instructions.
As a warning label on the product it is used to draw attention to
potential hazards which have to be avoided by reading the
manual.
Serves to highlight warnings and safety instructions that explicitly
indicate the risk of an electric shock.
Serves to highlight important information and useful tips on the
operation of the device/system. Failure to observe may lead to
unusable measurement results.
It is important to observe the generally applicable electrical regulations of the country in
which the device will be installed and operated, as well as the current national accident
prevention regulations and internal company directives (work, operating and safety
regulations).
After working on the system, it must be voltage-free and secured against reconnection
as well as having been discharged, earthed and short-circuited.
Use genuine accessories to ensure system safety and reliable operation. The use of
other parts is not permitted and invalidates the warranty.
The system may only be installed and operated by an authorised electrician. DIN VDE
0104 (EN 50191), DIN VDE 0105 (EN 50110) and the German accident prevention
regulations (UVV) define an electrician as someone whose knowledge, experience and
familiarity with the applicable regulations enables him to recognise potential hazards.
Anyone else must be kept away!
Safety precautions
Labelling of safety
instructions
Working with products
from Megger
Operating staff

Safety Instructions
9
This device is designed for industrial use. When used at home it could cause
interference to other equipment, such as the radio or television.
The interference level from the line complies with the limit curve B (living area), the
radiation level complies with the limit curve A (industrial area) according to EN 55011.
Given that living areas are sufficiently far away from the planned area of operation
(industrial area), equipment in living areas will not be impaired.
1.2 General Safety Instructions and Warnings
The operating safety is only guaranteed if the delivered system is used as intended (see
page 11). Incorrect use may result in danger to the operator, to the system and the
connected equipment.
The thresholds listed in the technical data may not be exceeded under any
circumstances.
To ensure safety for operators and traffic, the country-specific regulations must be
observed.
Five safety rules
The five safety rules must always be followed when working with HV (High Voltage):
1. De-energise
2. Protect against re-energising
3. Confirm absence of voltage
4. Earth and short-circuit
5. Cover up or bar-off neighbouring energised parts
Using cardiac pacemaker
Physical processes during operation of high voltage may endanger persons
wearing a cardiac pacemaker when near these high voltage facilities.
Electromagnetic
radiation
Intended application
Operation in traffic
environment

Safety Instructions
10
Fire fighting in electrical installations
•According to regulations, carbon dioxide (CO2) is required to be
used as extinguishing agent for fighting fire in electrical
installations.
•Carbon dioxide is electrically non conductive and does not leave
residues. It is safe to be used in energized facilities as long as the
minimum distances are maintained. A CO2fire extinguisher must
be always available within electrical installations.
•If, contrary to the regulations, any other extinguishing agent is
used for fire fighting, this may lead to damage at the electrical
installation. Megger disclaims any liability for consequential
damage. Furthermore, when using a powder extinguisher near
high-voltage installations, there is a danger that the operator of the
fire extinguisher will get an electrical shock from a voltage arc-over
(due to the powder dust created).
•It is essential to observe the safety instruction on the extinguishing
agent.
•Applicable is DIN VDE 0132.
Objects should not be placed on or lent against the heater, nor pushed
between the heater and wall.
Do not cover the air exit or leave any combustible material in close vicinity
to the heater.
WARNING
Dangers when working with high voltage
Working on high voltage systems and equipment – especially in non-
stationary operation – requires particular care and safety-conscious action
on the part of test personnel. VDE regulations 0104 on setting up and
operating electrical test systems, as well as EN 50191 and national
standards and regulations must be strictly adhered to.
•The Centrix 3 generates a dangerous voltage of up to 80 kV during
measurement operation. This is supplied to the test object via a high-
voltage cable.
•The test system may not be operated without supervision.
•Never fail to use safety equipment or put it out of operation.
•Operation requires minimum two people whereas the second person
must be able to activate the emergency switch in case of danger.
•To prevent dangerous charge accumulation, earth all metal parts in the
vicinity of the high voltage equipment.
WARNING
Peripheral devices
Please follow the safety instructions of the peripheral devices (e.g. heater)
installed in the system environment. For all peripheral devices provided by
Megger, the instructions manual is included in the scope of delivery.
Megger is not liable for damage to material or humans due to misuse of
these devices.