Megger VAX020 User manual

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User’s Manual
VAX020
High Voltage Amplifier
Art No. ZP-AF01E Doc. AF0050AE V01 2013

VAX020
High Voltage Amplifier
NOTICE OF COPYRIGHT & PROPRIETARY RIGHTS
© 2013, Megger Sweden AB. All rights reserved.
The contents of this manual are the property of Megger Sweden AB. No part of this work may be reproduced or transmitted in any form or
by any means, except as permitted in written license agreement with Megger Sweden AB. Megger Sweden AB has made every reasonable
attempt to ensure the completeness and accuracy of this document. However, the information contained in this manual is subject to change
without notice, and does not represent a commitment on the part of Megger Sweden AB. Any attached hardware schematics and technical
descriptions, or software listings that disclose source code, are for informational purposes only. Reproduction in whole or in part to create
working hardware or software for other than Megger Sweden AB products is strictly prohibited, except as permitted by written license
agreement with Megger Sweden AB.
TRADEMARK NOTICES
Megger® and Programma® are trademarks registered in the U.S. and other countries. All other brand and product names mentioned in this
document are trademarks or registered trademarks of their respective companies.
Megger Sweden AB is certified according to ISO 9001 and 14001.
User’s Manual
Postal address:
Megger Sweden AB
Box 724
SE-182 17 DANDERYD
SWEDEN
T [phone]
F [phone]
[e-mail]
www.megger.com
Visiting address:
Megger Sweden AB
Rinkebyvägen 19
SE-182 36 DANDERYD
SWEDEN
AF0050AE ZP-AF01E VAX020 3

4VAX020 ZP-AF01E AF0050AE
Contents
1 Introduction
___________________________________ 6
1 General.................................................................. 6
1.1 Description .................................................... 6
1.2 Receiving instructions .................................... 6
2 Safety
___________________________________ 8
2.1 Symbols on the instrument ................................. 8
2.2 Safety instructions............................................... 8
3 Control, indicators and connectors__ 10
3.1 Front panel ....................................................... 10
3.2 Back panel........................................................ 10
4 Run VAX020
__________________________________ 12
4.1 Connections ..................................................... 12
4.2 Perform a measurement...................................... 13
5 Specifications
__________________________________ 14

AF0050AE ZP-AF01E VAX020 5

6VAX020 ZP-AF01E AF0050AE
1 INTRODUCTION
1Introduction
1 General
1.1 Description
VAX020 is a 2 kV voltage amplifier designed to work
as an accessory to an IDA/IDAX test system, increasing
the output voltage from 200 V to 2000 V peak (1414
V rms). The main application is insulation diagnostics
in electric power systems with moisture assessment
for oil-immersed transformers as a key area.
In particular, VAX020 is recommended in situations
where measurements need to be performed during
high interference, e.g. measuring low capacitance
components in substations with severe AC and/or DC
noise/offset.
1.2 Receiving instructions
Check the equipment received against the packing list
to ensure that all materials are present. Notify Megger
of any shortage. Telephone [phone] and ask
for the Customer Service Department.
Examine the instrument for damage received in
transit. If damage is discovered, file a claim with the
carrier at once and notify Megger, giving a detailed
description of the damage.
This instrument has been thoroughly tested and
inspected to meet rigid specifications before being
shipped. It is ready for use when set up as indicated in
this manual.

AF0050AE ZP-AF01E VAX020 7
2 SAFETY

8VAX020 ZP-AF01E AF0050AE
2 SAFETY
2Safety
2.1 Symbols on the
instrument
Caution, refer to accompanying docu-
ments.
Caution, risk of electric shock.
Protective conductor terminal.
WEEE, Waste Electrical and Electronic
Equipment. Please utilize your local WEEE
collection facilities in the disposition of this
product and otherwise observe all applicable
requirements.
2.2 Safety instructions
Important
Read and comply with the following in-
structions.
Always comply with local safety regula-
tions.
Warning
1] The test set and the specimen to which it is con-
nected are a possible source of high-voltage elec-
trical energy and all persons making or assisting
in tests must use all practical safety precautions
to prevent contact with energized parts of the
test equipment and related circuits.
2] Persons actually engaged in the test must
stand clear of all parts of the complete high-
voltage circuit, including all connections, un-
less the test set is de-energized and all parts
of the test circuit are grounded. Persons not
directly involved with the work must be kept
away from test activities by suitable barriers,
barricades or warnings.
3] High-voltage discharges and other sources of
strong electric or magnetic fields may inter-
fere with the proper functioning of heart
pacemakers. Persons with heart pacemakers
should obtain expert advice on the possible
risks before operating this equipment or be-
ing close to the equipment during operation.
4] Treat all terminals of high-voltage power
equipment as a potential electric shock haz-
ard. There is always the potential of voltages
being induced at these terminals because of
proximity to energized high-voltage lines or
equipment.
5] The instrument is equipped with a power
cord with integral safety ground pin. The
equipment must be connected to a grounded
mains outlet.
The instrument case must also be grounded
by the separate protective ground wire with
connection to the protective earth terminal
on the rear panel. This is to eliminate differ-

AF0050AE ZP-AF01E VAX020 9
2 SAFETY
ence in earth potential between the instru-
ment and the device to be tested. Check the
continuity of the protective ground wire
before each use.
6] Do not attempt to service the instrument
yourself. Opening or removing covers may
expose you to dangerous voltage. If you at-
tempt to service the instrument yourself the
warranty is no longer valid.
7] Do not use any accessories that are not in-
tended for use together with the instrument.
8] Do not use the instrument for any purpose
other than indicated by the manufacturer.
9] Never connect the test set to energized
equipment.
10] Operation is prohibited in rain or snow.
11] Do not use the test set in an explosive atmo-
sphere.
12] Disconnect the instrument from the mains
before cleaning. Use a damp cloth for clean-
ing. Do not use liquid cleaners or aerosol
cleaners.
Important
1] Always use a safety ground stick to ground
the high-voltage conductor. A safety ground
jumper must then be installed between
all terminals of apparatus under test and
ground.
2] Always disconnect test leads from power
equipment before attempting to disconnect
them at the test set. The ground connection
must be the first made and the last removed.
Any interruption of the grounding connec-
tion can create an electric shock hazard.
3] Before making connection to the power
source, determine that the instrument rating
matches the voltage of the power source
and has a suitable two-pole, three-terminal
grounding connector.
4] The power input plug must be inserted only
into a mating receptacle with a ground con-
tact. Do not bypass the grounding connec-
tion. Any interruption of the grounding con-
nection can create an electric shock hazard.
Determine that the receptacle is properly
wired before inserting the plug.
5] Routine maintenance is all that is required
for these test sets. The cables and connector
panel should be inspected frequently to be
sure all connections are tight and all ground
connections intact.
6] A qualified operator should be in attendance
at all times while the test equipment is in
operation.
7] Refer to IEEE 510-1983, “IEEE Recommended
Practices for Safety in High-Voltage and
High-Power Testing,” for information.
8] Make sure that air intake and fan exhausts
are not blocked
9] Avoid dusty environments and locations be-
cause the accuracy can be affected by long-
term exposure to dust
10] The VAX020 is designed for indoor and
outdoor use. Although a rugged instrument,
it should be well protected when moved or
shipped.
11] The Protective Earth/Ground (PE) of the
VAX020 is connected to the earth/ground pin
of the inlet, making it grounded when the
mains cord is connected.
12] Connect VAX020 to ground using the ground
wing nut on the front panel to ensure pro-
tective grounding independent of the mains
cord being connected or not.

10 VAX020 ZP-AF01E AF0050AE
3 CONTROL, INDICATORS AND CONNECTORS
3Control, indicators and connectors
3.1 Front panel
1. ON / OFF switch
2. Mains inlet
3. Ground: wing nut/screw (PE)
4. Control: multi-pin connector to IDAX
5. Interlock: 3-pole XLR
6. Output: red LED is lit when high-voltage output is
active
7. Output: HV connector for 0-2000 V
3.2 Back panel
▪Two holes/grids for fans
▪Air inlet
1 6 7
3
2 4 5

AF0050AE ZP-AF01E VAX020 11
4 RUN VAX020

12 VAX020 ZP-AF01E AF0050AE
4 RUN VAX020
4Run VAX020
4.1 Connections
1] Connect VAX020 to protective ground on
the IDAX using the Ground cable (green
in the figure below)
2] Connect VAX020 (CONTROL) to IDAX (EXTER-
NAL) with the 12 pole multi-cable (blue in the
figure below)
3] Connect an Interlock cable to the Interlock
input (violet in the figure below)
4] Connect the VAX020 to the test object using
the Generator cable (18 meter) with HV con-
nector and clamp
5] Connect the Measure cable from the IDAX to
the test object
Test object
Interlock
switch

AF0050AE ZP-AF01E VAX020 13
4 RUN VAX020
4.2 Perform a measurement
1] Turn on the IDAX and the VAX020
2] Follow the standard IDAX procedure for
measurement setup
3] When prompted to select voltage: choose
VAX
4] Then add required voltage, e.g. 1400 V (RMS)
(same as 2 kV peak)
5] Perform the measurement in the same way
as a standard IDAX measurement. See IDAX
User Manual for more details.

14 VAX020 ZP-AF01E AF0050AE
5 SPECIFICATIONS
5Specifications
Specifications VAX 020
Environmental
Application field The instrument is intended for use in
medium- and high-voltage substations
and industrial environments.
Ambient temperature
Operating -20°C to +55°C (-4°F to +131°F)
Storage -40°C to +55°C (-40°F to +131°F)
Humidity < 90%RH, non-condensing
CE-marking
EMC 2004/108/EC
LVD 2006/95/EC
Category CAT 1
IP class IP21
General
Mains voltage 100-240 V AC, 50 / 60 Hz
Power consumption 120 VA (max)
Dimensions Instrument 335 x 300 x 99 mm
(17.7” x 6.3” x 16.1”)
Transport case 520 x 430 x 220 mm
(20.5” x 17” x 8.7”)
Weight 4.4 kg (9.7 lbs) without accessories
Interface
Control Connects VAX020 with IDAX
Interlock An external contact must be closed to al-
low the VAX020 to generate any voltage
Output HV connector that connects VAX020 to
the test object
VAX020 can be used
together with the fol-
lowing IDAX systems:
IDAX300, IDAX300S, IDAX206-FR,
IDAX206 and IDA200
Output
Voltage 2 kV (peak)
Current 50 mA (peak) above 50 Hz derating
linearly to 30 mA below 10 Hz
Frequency range DC-1 kHz
Capacitive load
capability
0-20 F
Max capacitive load
at 2 kV
80 nF at 50 Hz
67 nF at 60 Hz

AF0050AE ZP-AF01E VAX020 15

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Megger is a registered trademark.
Postal address:
Megger Sweden AB
Box 724
SE-182 17 DANDERYD
SWEDEN
T [phone]
F [phone]
[e-mail]
www.megger.com
Visiting address:
Megger Sweden AB
Rinkebyvägen 19
SE-182 36 DANDERYD
SWEDEN
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Subject to change without notice. Printed matter No. ZP-AF01E Doc. AF0050AE V01 2013