Megger Magnus Manuale utente

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

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 +46 8 510 195 00

F +46 8 510 195 95

seinfo@megger.com

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.

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.

Indice

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