Megger Magnus User manual

MAGNUS
Step up transformer
Art No. ZP-BT01E Doc. BT0026HE V04a 2018
WWW.MEGGER.COM
User’s Manual

Contents
1 Safety
___________________________________ 4
1.1 General............................................................... 4
Symbols on the instrument .................................. 4
1.2 Safety instructions............................................... 4
2 Instrument
___________________________________ 6
2.1 General............................................................... 6
2.2 Control panel...................................................... 6
2.3 High voltage cables............................................. 7
3 Operating instructions
___________________________________ 8
3.1 General test........................................................ 8
3.2 Application example ........................................... 8
Prepare an excitation curve .................................. 8
3.3 Using the variable mains output.......................... 9
4 Specifications
__________________________________ 10

MAGNUS
Step up transformer
NOTICE OF COPYRIGHT & PROPRIETARY RIGHTS
© 2016-2018, 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
BT0026HE ZP-BT01E MAGNUS 3

4MAGNUS ZP-BT01E BT0026HE
1 SAFETY
1Safety
1.1 General
Important
read and comply with the following in-
structions.
Always comply with local safety regula-
tions.
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 dispo-
sition of this product and otherwise
observe all applicable requirements.
The unit can also be returned to
Megger at any time at no charge for
the disposal.
1.2 Safety instructions
Warning
1] High voltage/current on input/output termi-
nals.
The equipment may only be operated by
qualified personnel.
2] Always use manufacturer approved and sup-
plied cable sets.
3] Always connect protective earth (ground).
4] The mains output is not separated from
mains supply
5] Do not leave the power unit switched on
unattended.
6] 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.
This is to eliminate difference in earth poten-
tial between the instrument and the device
to be tested. Check the continuity of the
protective ground wire before each use.
Use an easily accessible power outlet. This
will ensure that you can disconnect the pow-
er quickly in case of a problem.
7] 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.
8] Do not use any accessories that are not in-
tended for use together with the instrument.
9] Do not use the instrument for any purpose
other than indicated by the manufacturer.
10] If the equipment is used in a manner not
specified by the manufacturer, the protection
provided by the equipment may be impaired.

BT0026HE ZP-BT01E MAGNUS 5
1 SAFETY
11] Do not use MAGNUS if the instrument or test
leads appear damaged.
Important
1] Always turn the equipment off before con-
necting.
2] The ammeter output must be short circuit-
ed when it is not connected to an external
ammeter.
3] The red lamp (12) lights up when overheat-
ing protection trips. Do not use the Magnus
until the light is turned off.
4] Use only approved mains detachable cable
set with the instrument. Main supply cables
shall be rated for the maximum current for
the equipment and the cable shall meet the
requirements of IEC60799 (Cord sets and in-
terconnection cord sets). Mains supply cables
certified or approved by a recognized test-
ing authority are regarded as meeting this
requirement.
5] Use the supplied hook and loop straps for
securing the test cables to the test object.
6] Do not expose the instrument to rain or
moisture.
7] Disconnect the instrument from the mains
before cleaning. Use a damp cloth for clean-
ing. Do not use liquid cleaners or aerosol
cleaners.
8] Refer all servicing to Megger authorized
personnel.
9] If you need to return the instrument, please
use either the original crate or one of equiv-
alent strength.

6MAGNUS ZP-BT01E BT0026HE
2 INSTRUMENT
2Instrument
2.1 General
When power systems are put into operation or when
faults occur, it becomes necessary to check the instru-
ment transformers to make sure that they are provid-
ing test instruments and protective relay equipment
with the correct outputs.
MAGNUS permits you to prepare excitation curves for
instrument transformers quickly and easily.
MAGNUS is also used to demagnetize current trans-
former cores and to conduct turn-ratio tests on volt-
age transformers.
5
3
1
11
4
6
15
14
13
12
2
7
8
9
10
2.2 Control panel
1. High voltage output
2. Ammeter output
3. Voltmeter output
4. Mains output
5. F3, Fuse for mains out
6. Start button
7. F1, Fuse for mains input
8. Knob
9. Mains input
10. Operate lamp
11. Ground (earth) terminal
12. Overheating protection lamp
13. Mains indicator lamp
14. Mains switch
15. F2, Fuse for mains input

BT0026HE ZP-BT01E MAGNUS 7
2 INSTRUMENT
2.3 High voltage cables
Important
When using the "HIGH VOLTAGE OUT-
PUT" the cables included with MAGNUS
suited for high voltage must be used.

8MAGNUS ZP-BT01E BT0026HE
3 OPERATING INSTRUCTIONS
3Operating instructions
3.1 General test
Important
Read the manual and comply with the
Safety instructions before using MAGNUS.
Always comply with local safety regula-
tions.
1] Connect protective ground (earth) terminal
(11).
2] Connect the mains cable to a power outlet.
3] Connect the test leads only when the mains
switch and the knob is set in position "0".
Warning
For the HIGH VOLTAGE OUTPUT only the
high voltage cables should be used, see
section "2.2 High voltage cables".
4] Connect an ammeter to output (2) and a
voltmeter to the output (3).
Note Short circuit the ammeter output (3) if it is not
connected to an external ammeter.
5] Check that the knob is set in position "0".
6] Press and hold the red button marked
"START".
The "OPERATE" lamp is lit.
7] Adjust the voltage by turning the knob.
8] When testing CT's ramp down the voltage to
"0" before releasing the red button, in order
to avoid remanence.
Note In order to maintain accuracy make sure that
the burden not exceeds 1.5 VA. Use an am-
meter measuring true RMS.
Note The red lamp (12) lights up when overheating
protection trips. Do not use Magnus until the
light is turned off.
3.2 Application example
Prepare an excitation curve
1] Connect MAGNUS to the secondary side of
the current transformer being tested and
also to an ammeter and voltmeter.
2] Increase the voltage using the knob.
3] Jot down the values of U (voltage) and I
(current).
4] Repeat steps 2 and 3 until the current (I) rises
sharply without any significant rise in voltage
(U).
5] Conclude the test by reducing U (voltage)
slowly to zero, thereby providing demagne-
tization.

BT0026HE ZP-BT01E MAGNUS 9
3 OPERATING INSTRUCTIONS
3.3 Using the variable
mains output
The voltage from the MAINS OUTPUT is variable, 0 to
100% of the mains input voltage. It is not galvanically
isolated from mains input.
1] Connect the test leads only when the mains
switch and the knob is set in position "0".
2] Adjust the voltage by turning the knob.
3] Turn knob down to zero before disconnect-
ing any cables.

10 MAGNUS ZP-BT01E BT0026HE
4 SPECIFICATIONS
4Specifications
SPECIFICATIONS
Specifications are valid at nominal input voltage and an ambient
temperature of +25°C, (77°F). Specifications are subject to change
without notice.
Environment
Application field The instrument is intended for use in
high-voltage substations and industrial
environments.
Temperature
Operating 0°C to +50°C (32°F to +122°F)
Storage & transport -40°C to +70°C (-40°F to +158°F)
Humidity 5% – 95% RH, non-condensing
CE-marking
EMC 2004/108/EC
LVD 2006/95/EC
General
Mains voltage 115 / 230 V AC, 50 / 60 Hz
Power consumption 2300 VA (max)
Protection Fuses: F1, F2, F3 6 A
Thermal cut-outs
Dimensions
Instrument 356 x 203 x 241 mm
(14” x 8” x 9.5”)
Transport case 610 x 290 x 360 mm
(24” x 11,4” x 14,2”)
Weight 16.3 kg (35,9 lbs)
26.7 kg (58.9 lbs) with accessories and
transport case
High voltage cables 2 x 10 m (33 ft) / 1,5 mm2, 5 kV
Measuring outputs
Voltage 100 /1, (max load of 1 MΩ)
Inaccuracy ±1,5%
Current 10 / 1
Inaccuracy ±1,5% at 2 A output current
±3% at 0,5 A output current
Outputs
Voltage outputs, AC
230 V mains voltage
HIGH VOLTAGE OUTPUT 1) 0 – 2200 V AC
MAINS OUTPUT 1) 0 – 250 V AC (Variable transformer,
not isolated from mains)
Maximum values
Voltage Current Max. load time Rest time
2200 V AC 1 A 30 s 2) 10 minutes 2)
250 V AC 6 A3) Continuous –
Voltage outputs, AC
115 V mains voltage
HIGH VOLTAGE OUTPUT 1) 0 – 2000 V AC
MAINS OUTPUT 1) 0 – 110 V AC (Variable transformer,
not isolated from mains)
Maximum values
Voltage Current Max. load time Rest time
2000 V AC 1 A 30 s 2) 10 minutes 2)
110 V AC 10 A Continuous –
1) The HIGH VOLTAGE OUTPUT and the MAINS OUTPUT must not be loaded at the same
time.
2) The load time and rest time for the high voltage output is calculated at the maximum
output voltage and current. During an excitation test the voltage and current is only
at their maximum level at the end of the test.
3) Output protected with a 6 A fuse.