Megger CSU20A User manual

WWW.MEGGER.COM
User’s Manual
Art No. ZP-BF04E Doc. BF0087HE V02a 2018
CSU20A
Current and voltage source

CSU20A
Current and voltage source
NOTICE OF COPYRIGHT & PROPRIETARY RIGHTS
© 2010-2018, 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
BF0087HE ZP-BF04E CSU20A 3

4CSU20A ZP-BF04E BF0087HE
Contents
1 Safety
............................................................. 6
Symbols on the instrument.......................................... 6
Safety instructions....................................................... 6
2 General
............................................................. 8
Product description ..................................................... 8
Receiving instructions.................................................. 8
Warranty..................................................................... 8
Service and support..................................................... 8
Contact information.................................................... 8
3 Control panel
........................................................... 10
4 Operating instructions
...............................................................
Application examples ....................................................
5 Specifications
...............................................................

BF0087HE ZP-BF04E CSU20A 5
1 SAFETY
1Safety
Symbols on the instrument
Caution, refer to accompanying docu-
ments.
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.
Safety instructions
Important
Read the manual and comply with the following
instructions before using the CSU20A.
Always comply with local safety regulations.
Warning
High voltage/current on input/output terminals.
Do not attempt to service the instrument yourself.
Opening or removing covers may expose you to dan-
gerous voltage. If you attempt to service the instru-
ment yourself the warranty is no longer valid.
Do not use any accessories that are not intended for
use together with the instrument.
Disconnect the instrument from the mains before
cleaning. Use a damp cloth for cleaning. Do not use
liquid cleaners or aerosol cleaners.
Important
Always turn the equipment off before connecting.
Always use safety connecting leads.
Always connect protective earth (ground).
Never leave the instrument unattended while it is
turned on.
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 IEC 60227 or
IEC 60245. Mains supply cables certified or approved
by a recognized testing authority are regarded as
meeting this requirement.
Unplug the instrument from the mains supply when
it is left unattended or not in use.
Refer all servicing to Megger authorized personnel.
If you need to return the instrument, please use
either the original crate or one of equivalent strength

6CSU20A ZP-BF04E BF0087HE
2 GENERAL
2General
Product description
The CSU20A is intended for use together with the
SVERKER 750 when there is need for a second current
supply, as when testing differential relay protection
equipment. It is also possible to use a half-wave and
a full-wave rectified output when testing ”harmonic
restraint” and ”target/seal in”
Receiving instructions
▪Check the equipment received against the packing list to
ensure that all materials are present. Notify Megger of any
shortage.
▪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 user manual.
Warranty
Products supplied by Megger are warranted against
defects in material and workmanship for a period of
one year following shipment.
Our liability is specifically limited to replacing or repair-
ing, at our option, defective equipment.
This warranty does not include batteries, lamps or
other expendable items, where the original manufac-
turer’s warranty shall apply.
We make no other warranty. The warranty is void
in the event of negligence abuse (failure to follow
recommended operating procedures) or failure by the
customer to perform specific maintenance as indi-
cated in this manual.
Warranty repair
Equipment returned to the factory for repair must be
shipped prepaid and insured.
Contact your Megger representative for instructions
and a return authorization (RA) number.
Please indicate all pertinent information, including
problem symptoms.
Also specify the serial number and the catalog num-
ber of the unit.
Service and support
For technical assistance please contact your local
representative or direct your request to Megger in
Sweden.
When sending the instrument, please use either the
original crate or one of equivalent strength.
Add the return authorization number to the address
label of the shipping container for proper identifica-
tion and quicker handling.
Note Ship the equipment without nonessential
items such as test leads, etc. These items are
not needed by the factory to perform service.
Contact information
Internet: www.megger.com
E-mail: [e-mail]
Tel: [phone]
Fax: [phone]

BF0087HE ZP-BF04E CSU20A 7
3 CONTROL PANEL
3Control panel
1. Measuring output — to be connected to the
SVERKER 750 voltmeter
2. AC terminal 0, phase corresponds to
SVERKER 750 (if Sverker is connected to
MAINS OUT 14)
3. AC terminal
4. Half wave rectified output
5. DC terminal –
6. DC terminal +
7. Current range selector
8. Terminal for connection of resistors for in‑
creasing the internal impedance
9. Thermal fuse indicator
10. Knob (variable transformer)
11. Ground (earth) connector
12. Mains input
13. Mains switch
14. Mains output (unswitched), to be connected
to the SVERKER 750 mains input
15. Automatic fuse (3/6 A)
1
2
3
4
7
6
5
8
9
10
11
15
14
13
12

8CSU20A ZP-BF04E BF0087HE
4 OPERATING INSTRUCTIONS
4Operating instructions
Important
Read the manual and comply with the
Safety instructions, see page 5, before us‑
ing CSU20A.
Always comply with local safety regula‑
tions.
When a load is applied to the CSU20A,
connector (8) must be short‑circuited
either via the shorting jumper or external
resistors.
The switch (7) must only be operated
while the unit is unloaded.
1] Make sure that switch (13) is in the OFF "0"
position before making the connections.
2] Use toggle switch (7) to select either 20 A or
10 A test current.
3] Connect the current cables to output termi‑
nals (2), (3).
4] Turn the knob (10) down to zero and set the
switch (13) to the ON "1" position.
5] Check the output current using Sverker’s
voltmeter input connected to measuring
output (1).
6] Adjust the output current to the desired
value using the knob (10).
Note If red lamp (9) is lit, it indicates that the ther-
mal cutout has been triggered. It is automati-
cally reset when the temperature has returned
to its normal level.
Application examples
1] Connect CSU20A to mains and SVERKER 750
to CSU20A mains output.
2] Connect SVERKER 750 and CSU20A outputs
to the relay.
3] Connect the tripsignal to the STOP input on
SVERKER 750.
4] Set Sverker's Ext. Voltmeter to SHUNT, value
100 mΩ.
5] Connect the CSU20A measuring output to
the voltage input on SVERKER 750.
6] Set I1 with SVERKER 750 and I2 with CSU20A
and test limit/settings of the differential
relay.
7] Use OFF+TIME to measure the trip time.
Connection diagram for testing differential relays using
SVERKER 750 and CSU20A.

BF0087HE ZP-BF04E CSU20A 9
5 SPECIFICATIONS
5Specifications
Specifications CSU20A
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 -20°C to +50°C (-4°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
Thermal protection Built-in
Dimensions 280 x 178 x 246 mm (11” x 7” x 9.7”)
Weight 5.9 kg (13 lbs) excl. transport case
Outputs
AC
20 A setting Output voltage (min) Load time
Idle/non-load 26 V Continuous
5 A 25 V Continuous
10 A 22 V Continuous
20 A 18 V 2 min
10 A setting
Idle/non-load 52 V Continuous
3 A 50 V Continuous
5 A 47 V Continuous
10 A 41 V 10 min
DC
A full-wave rectified output and a half-wave rectified output.
As above, reduced by the voltage drop across the rectifier diodes.
If more than one output is loaded at the same time, total output
and load times are as above.
Measurement output
Current shunt 0.1 A / 1 V ±2%
Power output
For connection to the SVERKER mains input.

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is uniquely placed to meet the needs of its customers
worldwide.
Megger is certified according to ISO 9001 and 14001.
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-BF04E Doc. BF0087HE V02a 2018