Megger T 22/1 User manual

Instruction Manual
- Date of release: 4 (03/2011) -
Subject No: 128312849
AC Voltage Test Set
T 22/1

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AC Voltage Test Set T 22/1

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Consultation by Megger
These Operating Instruction are intended to help you solve any questions
and problems as fast and easily as possible. Please start with reading the
manual whenever some problem should arise.
If, however, some question should remain unanswered, please contact one
of the following addresses:
Megger Limited Seba Dynatronic
Mess- und Ortungstechnik GmbH
A
rchcliffe Road
Kent CT17 9EN
T: [phone]
F: [phone]
E: uksale[email protected]
Dr.-Herbert-Iann-Str. 6
D - 96148 Baunach
T: [phone] – 0
F: [phone]
E: [e-mail]
Hagenuk KMT
Kabelmesstechnik GmbH Megger US
A
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 disclaims all responsibility for
damage resulting directly or indirectly from the delivery, supply, or use of this matter.

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TERMS OF WARRANTY
Megger GmbH will accept a warranty claim brought forward by a customer
for a product sold by Megger under the terms stated below.
Megger guarantees that at the time of delivery every product of Megger is
free from faults in material or workmanship which otherwise would
considerably reduce its value or serviceability. This warranty does not
cover any fault in the software supplied. During the period of warranty,
Megger will repair faulty parts or replace them with new parts or parts as
new (with the same serviceability and life as new parts) at their option.
Further warranty claims, in particular those from consequential damage,
will not be accepted. Each component and product replaced under this
warranty becomes the property of Megger.
All warranty claims versus Megger expire after a period of 12 months from
the date of delivery. Each component supplied by Megger under this
warranty will also be covered by this warranty for the remaining period of
time or 90 days whichever is longer.
Each measure to remedy a warranty claim shall be carried out exclusively
by Megger or an authorized Megger service station.
It is a precondition for accepting a warranty claim that the customer brings
forward his complaint about the shortcoming without delay, in case of an
immediately detectable fault within 10 days from the date of delivery.
This warranty does not cover any fault or damage caused by exposing a
product to conditions not on accordance with this specification, by storing,
transporting, or using it improperly, or by having it serviced or installed by a
workshop not authorized by Megger. This warranty does not cover any
case of wear and tear, will of God, or connection to foreign components.
Megger can be made liable for any damage resulting from a violation of
their duty to repair or re-supply an item in case of severe negligence or
intention only. Any liability for slight negligence is disclaimed.
EC Declaration of Conformity

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CE
We
Hagenuk KMT
Kabelmesstechnik GmbH
Roederaue
D-01471 Radeburg
Germany
declare under sole responsibility that our product
75 kV AC Voltage Test Set T 22/1
is in conformity with the Directive of the Council of European Communities
for the Harmonization of the Laws of Member States on Electromagnetic
Compatibility (EMC Directive 89/336/EEC).
This EC declaration of conformity is the result of a verification test
performed by the Department of Quality Assurance of Hagenuk KMT
Kabelmesstechnik GmbH according to clause 10 of the Directive in line with
the basic technical standards EN 50081-1 Emissions, EN 50082-2
Immunity, product standard EN 55011 as well as basic standards
EN 60801-2 Electrostatic Discharge and IEC 1000-4-4 Fast Interfering
Transients.
Radeburg, 12 January 1996 Dr.Krieger
Managing Director

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TABLE OF CONTENTS
1GENERAL INTRODUCTION 11
1.1Safety Precautions-----------------------------------------------------------------11
1.2AC Voltage Testing ----------------------------------------------------------------13
1.3Test Set T 22/1 ---------------------------------------------------------------------15
2TECHNICAL DESCRIPTION 19
2.1Technical Specification -----------------------------------------------------------19
2.2List of Items Supplied and Optional Extras ----------------------------------20
2.2.1Items Supplied------------------------------------------------------------------20
2.2.2Optional Extras -----------------------------------------------------------------21
2.3Test Set-------------------------------------------------------------------------------22
2.3.1Test Transformer T 22/12----------------------------------------------------22
2.3.2Operation Unit T 22/124------------------------------------------------------22
2.4Optional Extra AC Voltage Test Set T 22/1----------------------------------22
2.4.1Product Versions---------------------------------------------------------------23
2.4.1.1Version 1 (Standard 75 kVrms AC Test Set) ---------------------------23
2.4.1.2Version 2 (Changeover):-----------------------------------------------------23
2.4.1.3Version 3 (Changeover) -----------------------------------------------------24
2.4.1.4Version 4 (Upgrade to DC Voltage Test Set 80 kV) ------------------24
2.4.1.5Version 5 (Upgrade to 150 kVrms)----------------------------------------25
3OPERATING INSTRUCTIONS 29
3.1Controls-------------------------------------------------------------------------------29
3.2Note -----------------------------------------------------------------------------------31
3.3How to Carry Out a Test----------------------------------------------------------31
3.3.1AC Testing-----------------------------------------------------------------------31
3.3.2DC Testing-----------------------------------------------------------------------32
3.2.3Special Characteristics of an AC Test with Two Transformers
(150 kV rms) --------------------------------------------------------------------33
3.2.4How a test is conducted------------------------------------------------------34
3.4Correction Chart--------------------------------------------------------------------35

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3.5Trouble-Shooting ------------------------------------------------------------------ 36
4TEST SET-UP 39
4.1AC Voltage Testing --------------------------------------------------------------- 39
4.2DC Voltage Testing --------------------------------------------------------------- 39
4.3AC Voltage Testing up to 150 kV ---------------------------------------------- 40

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CHAPTER 1
GENERAL INTRODUCTION

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1 GENERAL INTRODUCTION
1.1 Safety Precautions
Each person involved in the assembly, maintenance, and
repair of this system is required to have read this manual
carefully.
At the time of supply, this set and its accessories are in line
with the state of the art in safety control. In their operation
there may be parts and places of the set, however, which
cannot be protected properly without unreasonably interfering
with their function and control. This is why comprehensive
personal experience in safety matters is vital for the protection
of both staff and equipment.
For this reason, always abide by the following safety
instructions!
GENERAL INSTRUCTIONS
Only trained and / or instructed staff are permitted to deal with
this set and its peripherals. Keep other persons away from it.
This manual shall be available to the supervising, operating,
and maintenance staff for reference.
Improper use may constitute a high risk of damage to the life
and health of the operator, the set and any equipment
connected to it as well as its efficient operation (UVV -
Prevention of Accidents Regulation). Use the set exclusively to
the purpose it has been designed for by its manufacturer.
Always use the appropriate tools for each operation and keep
your tools in good condition!
Constantly check the observance of all safety precautions
during operation and maintenance.
This set is allowed to be run by authorized staff with sufficient
expertise only.
Operate the set and its peripherals only when it is in a good
technical condition.

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Never use any foreign part on the set and its peripherals since
otherwise the indispensable degree of safety may be
jeopardized.
Do not carry out any operation which may put the safety of the
set at risk.
The user is obliged to immediately report any arising change
in the set to the supervisor in charge.
The operator is obliged to immediately shut the set down
whenever a fault occurs which may be a safety risk to the
staff. The set is permitted to be switched on again only after
the fault has been remedied.
ELECTROTECHNICAL INSTRUCTIONS
The set and all its peripherals shall be connected according to
instructions. All relevant standards such as DIN and VDE shall
be observed.
For example: DIN VDE 0104 - Installation and operation of
electric test sets.
Any repair or maintenance operation may be carried out only
after all circuits have been shut down (are in a dead state) and
only by an electrical expert according to UVV. A person is
regarded an electrical expert to UVV (Prevention of Accidents
Regulation) when due to his or her practical training,
knowledge, and experience as well as knowledge of all
relevant regulations he or she is able to assess the operation
to be carried out and detect any possible risk.

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1.2 AC Voltage Testing
(Methods of voltage testing of electrical power production
equipment)
In order to obtain data on the insulating characteristics and
dielectric strength of electrical equipment, tests are carried out
at determinate voltages in excess of its operating voltage.
Either AC or DC voltage can be used for the tests with AC
testing getting closer to real conditions in power supply
networks than DC testing.
The T 22/1 AC Voltage Test Set can be upgraded by adding a
DC voltage adapter (optional extra) to form a DC voltage test
set. The rectifier can be reversed thus allowing tests to be
made with both polarities.
The effort for carrying out an AC test is mainly determined by
the reactive power needed.
One conductor of a series 30 high voltage cable requires a
reactive power of approx. 100 kVA at 2 U0per km. This power
has to be supplied by the test set. Such equipment is very
heavy and unwieldy. For this reason, DC testing is preferred
for cables of older construction. In DC testing the equipment
needs only supply the resistive discharge current of the test
object at, however, a higher voltage of 6 U0.
According to VDE 0670, AC testing is stipulated for testing
switchgear. In this case the capacitances of common test
objects are generally small, so the test output power required
is within reasonable limits.

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According to VDE Regulations, test voltages for switchgear,
either of metal design or encapsulated in insulating material,
are
against earth over insulating
series 10 28 kV 32 kV
series 20 50 kV 60 kV
series 30 70 kV 80 kV
See also VDE 0670, Parts 6 and 7.
The following table states common test object capacitances of
electrical equipment with their required test output power.
Included are: Test voltage value
Type of test object
Test object capacitance (approx.)
Power output rating of test transformers
series 10 series
20 series 30 (35 kV)
(55 kV) (75 kV)
C R(react) N N N
Test object pF MkVA kVA kVA
Insulators 20 160 0.008 0.02 0.035
Props
Bushings 200 16 0.08 0.2 0.35
Transducers 400 8 0.16 0.4 0.7
Combined transd. 600 5 0.24 0.6 1.05
Transformers
up to 1 MVA 1000 3.14 0.4 1.0 1.8
Transformers
up to 20 MVA 4000 0.8 1.6 4.0 7.0
Cable
length 10 m 3000 1.0 1.2 3.0 5.2

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Test duration is 1 minute. For this time, the T 22/1 Test Set
supplies an output power of 4 kVA. As the above table shows,
this output power is sufficient to test complete series 30
switchgear, i.e. the appropriate combination of components
listed in the table. If the output power is still inadequate,
testing can be restricted to a single conductor.
1.3 Test Set T 22/1
The T 22/1 Test Set is primarily for AC voltage testing of
switchgear up to series 30 in accordance with VDE Regulation
0670.
Test power output for the test duration of 1 minute as
stipulated by VDE is 4 kVA, so a “winding-versus-winding test“
of a transformer with a rating of several MVA can also be
carried out.
Due to the SF6-gas insulation technology employed, the test
transformer has a very light weight of 29 kg only! This means
that
2 persons can easily carry it to a test site.
A rectifier can be attached to the test transformer to enable
DC voltage tests to be carried out on cables up to series 20
with 6 x U0.
Output voltage can be measured either at the test transformer
primary or - after having exchanged a plug-in measuring unit
in the control section - at the output through a resistive voltage
divider.
In addition to using a single transformer for tests at up to 75
kV, two test sets can be employed for tests at up to 150 kV
balanced to earth.

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CHAPTER 2
TECHNICAL DESCRIPTION

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2 TECHNICAL DESCRIPTION
2.1 Technical Specification
Output voltage 0 to 75 kVrms
with 2 transformers
balanced to earth max. 150 kVrms
Maximum test duration 1 kVA: without limit
2 kVA: 20 minutes
4 kVA: 1 minute
Current rating 13 mA
Short-circuit current max. 50 mA (1 minute)
Test duration under load of ca. 1000 pF: max. 30 minutes
DC voltage testing max. 80 kVDC
(with T 22/121) at 4 mA current rating rectifier
attachment)
Power supply 220/240 V 10 % 50/60 Hz
Dimensions
Operation unit T 22/124 551 x 255 x 380 mm (19“case)
SF-6-gas
transformer T 22/12 420 mm , 560 mm high
Weights
Operation unit T 22/124 approx. 19 kg
SF-6-gas
transformer T 22/12 approx. 29 kg
Subject to alteration

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2.2 List of Items Supplied and Optional Extras
2.2.1 Items Supplied
AC Voltage Test Set T 22/1, Order number: 2502151
The standard equipment includes the following items:
number name Order No
1 piece test transformer T 22/12 3020637
1 piece operation unit T 22/124 2491575
1 piece AC voltage measuring
unit M 402 2485699
1 piece terminal clamp 0406 3020642
1 piece test lead, 1.5 m 0137 3020645
1 piece earth wire, 25², 2.5 m 0313 3020641
1 piece earthing terminal
clamp
0403 2480646
1 piece bag for accessories 0890 2480883
1 piece mains cable, 4 m L 304 3020631
1 piece terminal clamp L 909 3020646
1 piece control cable K 001 3020647
1 piece earth wire, 25², 5 m 0319 3020638