Megger Easytest 20 kV User manual

Easytest 20 kV
Quick Commissioning Tester
USER GUIDE
Issue: A (10/2020) - EN
Article number: 128311586

1-3
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, please contact:
Megger Limited Seba Dynatronic
Mess- und Ortungstechnik GmbH
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]
Hagenuk KMT
Kabelmesstechnik GmbH
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 disclaim all responsibility
for damage resulting directly or indirectly from the delivery, supply, or use of this matter.

1-4
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.
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.
To register a claim under the provisions of this warranty, the customer has to complain about the defect, in case of
an immediately detectable fault within 10 days from the date of delivery.
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.

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Contents
1Safety Advice ...................................................................................................................1-6
1.1 General Notes.......................................................................................................................1-6
1.2 General Cautions and Warnings ...........................................................................................1-7
2Technical Description......................................................................................................2-9
2.1 Technical Data......................................................................................................................2-9
2.2 Device Structure .................................................................................................................2-10
2.3 Functional Description ........................................................................................................2-11
3Setting Up the System ................................................................................................... 3-12
3.1 Electrical connection of the Easytest System ...................................................................... 3-12
3.2 Switching On the System.................................................................................................... 3-14
3.3 Safety Mechanisms.............................................................................................................3-14
4Operating the System .................................................................................................... 4-17
4.1 Configuring the System.......................................................................................................4-17
4.2 Adjusting Profile Settings ....................................................................................................4-18
4.3 Logging Function (optional)................................................................................................. 4-19
4.3.1 Logging to a USB Stick .............................................................................................4-19
4.3.2 Logging to a WinkisVLF System Card....................................................................... 4-21
4.4 Performing Tests ................................................................................................................4-23
4.4.1 Hipot Operation Mode...............................................................................................4-24
4.4.2 AC Operation Mode ..................................................................................................4-24
4.4.3 Sheath Fault Testing / Pinpointing.............................................................................4-26

1-6
1 Safety Advice
1.1 General Notes
Safety precautions This manual contains basic advice for the installation and operation of the Easytest. It
is essential to make this manual accessible to the authorised and skilled operator. He
needs to read this manual closely. 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!
Symbols used in this
manual
Important instructions concerning the protection of staff and equipment as well as
technical safety within this document are labelled with one of the following symbols:
Symbol Description
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury or material damage.
Notes have important information and useful tips on the operation of
your equipment. Non-observance may result in useless measure-
ment results.
Working with equipment
of Megger
All electrical regulations of the country where the system is operated have to be
observed as well as national regulations for prevention of accidents and existing
regulations for the safety and operation of equipment of the involved companies.
After working with the equipment, make sure to de-energise, protect against re-
energising, discharge, ground and short-circuit the instrument and installations that
have been worked on.
Original accessories ensure safe operation of the equipment. It is not allowed and the
warranty is lost if other accessories than the original ones are used with the
equipment.
Operating personal Only trained and/or instructed staff is permitted to deal with this syste
m and its
peripherals. Keep any other person away from it.
Only authorised persons with sufficient expertise are allowed to operate the device.
Repair and maintenance Repairs and service must only be done by Megger or authorised service departments
of Megger. Megger recommends having the equipment serviced and checked once
per year at a Megger service location.
Megger also offers direct on-site support. Please contact our service office for more
information.
WARNING
CAUTION

1-7
1.2 General Cautions and Warnings
Intended application Safe operation is only realised when using the equipment for its intended purpose
(see chapter 2.3 Functional Description). Using the equipment for other purposes may
lead to human danger and damage of equipment of involved installations.
The limits described under technical data may not be exceeded. Operating products
of Megger in condensing environment may lead to flash-over, danger and damage.
The instruments should only be operated under tempered conditions. It is not allowed
to operate Megger products at direct contact with humidity, water or near aggressive
chemicals nor explosive gases and fumes.
Behaviour at malfunction
of normal operation
The equipment may only be used when working properly. When irregularities or
malfunctions appear that cannot be solved consulting this manual, the equipment
must immediately be put out of operation and marked as not functional. In this case
inform the person in charge who should inform the Megger service to resolve the
problem. The instrument may only be operated when the malfunction is resolved.
Fife 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. Ground 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.
Fire fighting in electrical installations
•Recommended extinguishing agent: carbon dioxide (CO2)
•Carbon dioxide is electrically non conductive and does not leave residue. It is safe
to use in energized facilities as long as the minimum distances are observed.
•It is essential to observe the safety instruction on the extinguishing agent.
•Applicable is DIN VDE 0132.

1-8
Be careful 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 Easytest generates a dangerous voltage of up to 20 kV during testing. This
is supplied via a HV cable to the test object.
•The test system may not be operated without supervision.
•When the test system in use, a second person must always be within sight and
calling distance, in order to use the emergency off switch in the event of danger.
•Never fail to use safety equipment or put it out of operation.
•To prevent dangerous charge accumulation, earth all metal parts in the vicinity of
the high voltage equipment.
•All ca
bles which are out of operation and not tested must be shorted and
earthed.
•The system and all auxiliary equipment must be connected in accordance with
the regulations. The applicable EN, DIN, VDE and national standards and regu-
lations must be strictly adhered to.
•Check whether there are any unsecured live systems or components in the im-
mediate vicinity of the test system which might you or the system might
accidentally come into contact with. This particularly applies to components
which carry high voltage or where the voltage is unknown.
Secure these components using insulating covers. If technical reasons make it
impossible to do this, switch them off or have this action carried out at the site for
the duration of your work after consulting whoever is responsible. Make sure this
is done properly.
WARNING

2-9
2 Technical Description
2.1 Technical Data
Technical data The following parameters are specified for the Easytest receiver:
Parameter Value
Output voltage (DC) 0 ... -20 kV
Source output current 15 mA
Display ranges
Leakage current measurement
0 ... 1 mA, 0 ... 50 mA
0 ... 1 mA, resolution 5 %
Output voltage AC test 0 ... -20 kVDC, 0 ... +20 kVDC
AC test frequency 0,1 Hz for C ≤ 0,5 µF
0,05 Hz for C > 0,5 µF ≤ 1,0 µF
0,02 Hz for C > 1,0 µF < 2,5 µF
0,01 Hz for C > 2,5 µF < 5,0 µF
Voltage wave shape Resembling a rectangle
Testable cable capacitance ≤ 5,0 µF
Sheath test and pinpointing output voltage 0 ... - 5 kVDC / 0 ... -10 kVDC
Output current
Sheath test
Sheath fault pinpointing
DC, Imax = 15 mA
1:3, Imax = 25 mA
Test duration
Range
Interval
0 ... 60 min
First 5 minutes: adjustment in 1-minute steps
Thereafter: adjustment in 5-minute steps
Safety circuit FOhm BE and PE monitoring
External voltage protection (output
separation) (optional)
max. 12 kVAC (optional)
Power supply
230 V ±10 %, 50 ... 60 Hz or
115 V ±10 %, 50 ... 60 Hz
Front panel fuse: 6.3 A MT
Front panel fuse: 10 A MT
Power consumption max. 750 VA
Operating temperature range -20 °C ... +50 °C
Operating humidity +30 °C, 93 % relative humidity
Storage temperature range -25 °C ... +60 °C
Protection class (DIN VDE 0140 T.1) I
Type of protection IP 40 according to EN 60529,
IP 54 with lid closed
Dimensions (W x H x D) 480 x 290 x 495 mm
Weight 17 kg
19 kg, including wiring harness

2-10
2.2 Device Structure
Front view The following illustration shows the front view of the Easytest:
Controls and
connections
The Easytest system has the following controls and connections:
Control Description
1 Membrane keypad
2 Display
3 Emergency off switch
4 HV output
5 HV “interlock” key-operated switch
6 HV on button
7 HV off button
8 Power switch
9 Fuse
10 Power supply
11 Protection earth socket
12 Smartcard slot used to log test data on WinkisVLF system card
(optional)
13 USB slot used to log test data on a USB stick (optional)
3
10
9
8
4
2
1
5
6
7
11
13
12

2-11
2.3 Functional Description
Operation modes The Easytest system offers the following operation modes:
•DC testing (Hipot) up to 20 kV negative output voltage for testing the dielectric
strength of new or disconnected cables (particularly
for paper insulated lead
cables (PILC))
•AC testing up to 20 kV AC voltage for testing the dielectric strength of new or
disconnected cables.
•Sheath fault testing: up to 5 kV / 10 kV
•Sheath fault pinpointing:up to 10 kV; duty cycling 1:3
Features The Easytest combines the following features in a single device:
•Test parameters like test duration and test voltage can be specifically specified for
each operation mode. Setting the test duration to 0 minutes causes a permanent
test which can be interrupted by the HV off button (7).
•The test voltage can be adjusted using the navigation buttons even if the test is
already running.
•Leakage current measurement
•Automatic current range switch
•Automatische Strombereichsumschaltung
•Constantly updated bargraph indicating the progress of the running test
Options Depending on the present system configuration, the Easytest
offers the following
additional functions:
•Logging function to analyze / archive test data using Excel or WinkisVLF
•External voltage protection
•Trolly for easier transport of the Easytest unit
Standard scope of
delivery
The following items are included with the standard shipment of the Easytest:
•2.5 m mains power cable
•1.5 m earthing cable
•3.5 m HV connection cable
•Phase terminal
•Earth connection terminal
•Accessory bag
•Manual

3-12
3 Setting Up the System
Safety instructions for setting up
•Select a location which is sufficient for t
he weight and size of the system and
ensures that it stands securely.
•When setting up the Easytest system, make sure no other systems or components
are impaired in their function. If other systems and components have to be modified
in order to set up and operate the test systems, make sure these actions are
reversed when the work is finished. Always take the special requirements of these
systems and components into account and only carry out work on them after
consulting and obtaining approval from whoever is in charge of them.
•Install protective equipment (such as railings, chains or bars) to block access to
the hazard zone and prevent the risk of touching live parts.
3.1 Electrical connection of the Easytest System
Safety instructions on electrical connection
•Always follow the safety instructions in section 1.2 General Cautions and
Warnings - in particular the five safety rules - before connecting the test object.
•The Easytest
may only be connected to or disconnected from a test object when it
is switched off, and only when the test object is earthed and shorted.
•After releasing the test object, make sure that dangerous voltage cannot reach
unprotected places or technical equipment.
•The discharge switch installed in the device is merely an apparatus for safely
discharging capacitance, and not an earthing and shorting device as described
by VDE 0104.
•All voltage transformers have to be disconnected from the cable under test before
starting a test measurement.
WARNING
WARNING

3-13
Connection
diagram
The following illustration shows the basic connection diagrams for the various
operation
modes:
Connection
sequence
Connect the system in the following order:
Step Action
1 Connect the earthing cable to the protective earth of the station and then fasten
it to the earth socket (11) of the test system.
2 Plug the high voltage connection cable into the HV output of the test system (4)
and fasten it by turning the lock.
Then connect the HV connection cable to the phase or the screen of the cable
under test (depending on the operation mode). The screen of the HV connection
cable has to be connected to system earth.
3 Plug the supplied power cable to the power connection of the test system (10)
and connect it to a mains socket.
Protective
earth cable
HV connection
cable
Power cable
<6 Ω
<6 Ω
Sheath test / pinpointing
DC and AC test
PE
PE

3-14
3.2 Switching On the System
Switch-on procedure Before it is switched on using the power switch (8), the device is in the ‘off’ state.
In
this state, the HV output is earthed. For devices with external vol
tage protection
(optional),
the HV source and the internal earthing of the device are separated from
the HV output by the HV circuit breaker.
The capacitive voltage divider for measuring
the external voltage (optional) is directly connected to the HV output.
When the power switch is turned on, the system is in the ‘standby’
state. The controls
are activated and the display shows the welcome screen, followed by the main menu.
3.3 Safety Mechanisms
Introduction From ‘standby’ mode onwards, the system is constan
tly monitored by a number of
safety mechanisms.
If one of these mechanisms reports a malfunction, either the entire system is
stopped
(coming along with an individual error message) or, in the case of a test voltage
deviation, the system solely indicates the problem.
If a running test is interrupted
, the cable under test is discharged via the internal
discharge switch. If the interruption is caused by the optional e
xternal voltage
protection (see next page), the cable under test is not discharged!
Interlock
(key-operated switch)
You can activate or deactivate an HV interlock using the key-
operated switch (5). In the
vertical position
, the HV interlock is activated and no measurements can be
performed. The display shows the following message:
You can deactivate the HV interlock by turning the key a quarter turn clockwise.
Afterwards, the system message has to be acknowledged using the clear soft key.
‘F-Ohm’ safety circuit The F-Ohm safety circuit monitors the loop resist
ance of the system earth (test cable
screen) and the safety earth.
If the resistance is more than 6 ohms, a system
message notifies you of the fault in the safety circuit.
The operator must rectify the cause of the fault and then press the clear soft k
ey to
continue using the system.
F-Ohm
clear
Key-operated switch
clear

3-15
External voltage
protection (optional)
If external voltage protection is available, the external voltage detector monitors
the
presence of AC voltage at the HV output (from ‘standby’ mode onwards)
. If it is more than
1000 VAC, a system message appears
and a continuous warning signal sounds. An
internal circuit breaker
then separates the HV output from the rest of the HV system in the
device. This prevents the test object from discharging.
The operator must rectify the cause of the fault and then press the clear
soft key to
continue using the system.
In some operation modes, the external voltage detector is disabled by default (see
sections 4.4.1 Hipot Operation Mode and 4.4.3 Sheath Fault Testing / Pinpointing)
Devices equipped with the optional external vol
tage protection do not discharge the
cable under test, if an abrupt power outage (e.g. power failure) takes place. In that
case, the cable under test has to be manually discharged and grounded.
Even in the case of an abrupt switch-off using the power swi
tch (8), a device
equipped with exter
nal voltage protection does not discharge the cable under test.
Thus, it is recommended to use the HV off
button (7) to terminate a running test in
order to ensure proper discharging of the cable under test. Afterwards,
the device
can be switched off using the power switch.
Emergency off switch
If the system detects that the emergency off switch has been pressed, it is switched to
the ‘standby’ state. A system message appears to notify the operator.
The operator must rectify the cause of the fault and then press the clear
soft key to
continue using the system.
Emergency off
clear
External voltage
clear
WARNING

3-16
Over-temperature
protection
The device is protected by an over-
temperature protection. If an excessive
temperature is detected during operation, the device is switched to the ‘standby
’
state. A system message appears to notify the operator.
The operator has to take a break in order to cool down the device and then press the
clear soft key to continue using the system.
Test voltage deviation If the actual test voltage value differs more t
han 1000 V from the selected reference
value, the voltage indicator in the display starts flashing every second
. Furthermore,
an acoustic signal sounds in the same cycle.
Possible causes for such a voltage deviation may be, among others,
leakage
currents at cable terminations or very wet joints.
If a voltage deviation is indicated
, the operator has to weigh up whether a voltage
breakdown at the fault location can still be provoked
despite of the reduced test
voltage and, thus, whether it makes sense to continue the test.
If the voltage deviation
lasts until the test duration is expired, a system messages
appears to notify the operator about the voltage deviation during test:
During sheath fault pinpointing and permanent DC tests, a test voltage deviatio
n
is not indicated.
over temperature
clear
Cable problem
Test terminated
clear

4-17
4 Operating the System
Main menu
In the main menu you can scroll through the test profiles in the main menu using the
▼ and ▲ soft keys and read the settings for each profile in the left section of
the
display.
Furthermore, the Easytest - Setup is accessible via the main menu.
4.1 Configuring the System
In order to access the Esaytest setup, the menu item Easytest – Setup
has to be
selected in the main menu using the ▼ und ▲ soft keys. Afterw
ards, the setup can be
accessed using the Enter soft key.
The system menu offers the possibility to change the system language
and the
internal system time. Since a properly adjusted system time is exclusively
important
for the optional logging function to generate comprehensible data
, the system time
can only be adjusted at devices possessing this function.
Use the ► soft key, to scroll through the available parameters (e.g.
language, hours,
minutes). The value of the active parameter can be adjusted using the ▼ und ▲
soft
keys.
In order to save the changes, the setup window has to be left using the Enter
soft
key.
AC test 1
AC test 2
AC test 3
AC test 4
AC test 5
Hipot
Sheathtest/Pinpoint.
Easytest - Setup
voltage
08 kV
timer
5 min
cycles
0
Enter
▲
▼
Set
Engl.
D
NL
10:08:59
14/03/07
Enter
▲
▼
Serv.
►
Easytest - Setup

4-18
4.2 Adjusting Profile Settings
Test profiles The Easytest system is delivered with a number of predefined test profiles
(at least
one per operation mode)
. The parameters of this test profiles can be adjusted by
selecting the appropriate profile in the main menu using ▼ und ▲
soft keys and
accessing the profile page using the Set soft key.
Afterwards, the following profile
page appears in the display:
Use ► to navigate through the available parameters voltage, t
imer and cycles (only
for AC test) and use ▼ and ▲ to change the respective value. The Enter soft key
has
to be used to either discard or save the changes and return to the main menu.
For the first 5 minutes, the test duration can be adjusted in 1-minute steps
. From the
5 minutes threshold onwards, the duration can only be adjusted in 5-
minute steps.
Setting the test duration to 0 minutes causes a permanent test which can be
interrupted by the HV off button (7).
The test voltage can be adjusted in steps of 1 kV or 100
V. The step size can be
switched by pressing the 1 kV soft key or the 100V
soft key respectively. The
minimum selectable test voltage is 1 kV.
If a WinkisVLF system card is used (see section 4.3.2 Logging to a
WinkisVLF
System Card), the test voltage can only be adjusted in steps of 1 kV.
Test duration / periods
(in the case of AC tests)
You can also set the number of periods as criteria for the duration of an AC test.
The
test duration is adjusted based on a test frequency of 0.1 Hz.
For test capacitances
above >0.5 µF, the time is automatically adjusted at the beginning of an AC test.
Whether the test duration of an AC test profile is determined
by a defined time period
or by a defined amount of peri
ods is distinguishable via the profile view in the main
menu.
Defined time period Defined number of periods
AC test 1
Voltage Timer
Cycles
8,0kV
5 min
60
Enter
▲
▼
►
AC test 1
AC test 2
AC-Test 3
AC test 4
AC test 5
Hipot
Sheathtest
Easytest-Setup
voltage
08 kV
timer
5 min
Set ▼ ▲ Enter
AC test 3
AC test 1
AC test 2
AC test 3
AC-Test 4
AC test 5
Hipot
Sheathtest
Easytest-Setup
AC test 4
voltage
08 kV
cycles
30
Set ▼ ▲ Enter
1 kV

4-19
4.3 Logging Function (optional)
Introduction The measured data gathered by the Easytest system
can be logged in an easy way
using either a USB stick or a WinkisVLF system card.
During sheath fault pinpointing and permanent DC test
s, the measured data is not
logged.
4.3.1 Logging to a USB Stick
Prerequisites For logging measured data, it is recommended to use a
USB stick of the type
Sandisk Cruzer®.
The USB stick must not be plugged in the slot (13) until
a system message asks
to do so. Prior to and during a test, the USB stick must not be plugged in.
Procedure
During operation, the measured data is temporary stored in the internal system
memory.
After a test has been finished, the following message appears in the display
asking
for the USB stick to be plugged in:
In order to initiate the data transfer, a USB
stick has to be plugged in the appropriate
slot (13)
. After up to 10 seconds (depending on the memory size of the stick), the
symbol appears in the upper right display reporting that the stick has been
identified by the system.
By pressing the Enter soft key, the measured data
is transferred to the stick which
will take a few seconds. Afterwards, the system returns to the main menu.
By pressing the Esc soft key, the measured data is
discarded and the system
immediately returns to the main menu.
Esc
Enter
Data storage

4-20
File format The test data is written in a data file (*.csv) using the CSV (Comma-
Separated
Values) format. Furthermore a summary
of the measuring results is written in a
separate header file (*.txt). The names of the files result from the following pattern:
<Prefix><Date><Consecutive number>.< File extension>
Prefix: H… header file
D… data file
Date: Format YMMDD
Consecutive
number:
Double-digit number which is counted up by one for each logging
event
Example: H7041103.txt – a header file from 11th of April 2007 with the number 03.
As a result of the described file name pattern, the files on the stick can be ordered by
name.
The data can be viewed using Excel or comparable applications.
Header file The header file consists of generic inform
ation about parameters, type, duration and
result of the logged test procedure. T
he way the data is arranged, it can be used as
test protocol.
One can easily add any comments using an adequate editor.
Data file The actual test data is logged to the data file. About every 5 seconds or
following the
cycle of the AC voltage respectively, an entry is added to the date file which contains
information about time, voltage (in V) and current (in μA)
. In this way, the complete
test procedure can be followed by means of the logged data.