Megger T22/13B User manual

Instruction Manual
Date of release: 2003/ 25
Item number: 128311145
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15 kV BURN OUT SET
T 22/13B

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FOREWORD
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
Archcliffe Road
Kent CT17 9EN
T: [phone]
F: [phone]
E: [email protected]
Dr.-Herbert-Iann-Str. 6
D - 96148 Baunach
T: [phone] – 0
F: [phone]
E: [email protected]
Hagenuk KMT
Kabelmesstechnik GmbH
Megger USA
Röderaue 41
D - 01471 Radeburg / Dresden
T: [phone] – 0
F: [phone]
E: [email protected]
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 AND CONDITIONS OF WARRANTY
Megger 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 Megger products are free
from faults in material and workmanship which would reduce their value
and serviceability to a large degree. This warranty does not cover any error
in the software supplied. During the warranty period Megger will repair
faulty parts or replace them with new parts or parts as new (with the same
usability and life as new parts) at their discretion.
Further warranty claims, in particular those from consequential damage,
cannot be accepted. Each component and product replaced in accordance
with 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 in the context of
warranty will also be covered by this warranty for the remaining period of
time, but at least for 90 days.
Each measure to remedy a warranty claim must be carried out exclusively
by Megger or one of their authorised service stations.
It is a precondition for accepting a warranty claim that the customer com-
plains about the fault, in a 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 which are not in accordance with this specification, by
storing, transporting or using it improperly, or having it serviced or in-stalled
by a workshop not authorised by Megger. No claim will be ac-cepted in
case of wear and tear, will of God, or connection to foreign components.
For any damage resulting from a violation of their duty to repair or re-supply
items, Megger can be made liable only in case of severe negligence or
intention. Any liability for slight negligence is disclaimed.

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TABLE OF CONTENTS
1. GENERAL 15
1.1. Safety instructions............................................................... 15
1.1.1. General safety regulations ..................................................... 17
1.1.2. General rules for working with high voltages......................... 20
1.1.2.1. Supplementary instructions.................................................... 21
1.1.2.2. Danger of recurring voltage from space charges .................. 21
1.1.3. Safety instructions specific to the measuring van.................. 22
1.1.4. Dangers of search pulse location .......................................... 23
1.1.5. Indications used in the description......................................... 26
1.1.6 Connection regulations .......................................................... 27
1.2. General functional description ........................................... 30
1.3. Scope of delivery ................................................................. 31
2. GENERAL DESCRIPTION OF
MEASURING PROCEDURES 35
2.1. Introduction .......................................................................... 36
2.2. Pre-locating .......................................................................... 37
2.2.1. Low-impedance fault location ................................................ 37
2.2.2. High-impedance fault location................................................ 40
2.3. Pinpointing ........................................................................... 45
2.3.1. Pinpointing in power cables ................................................... 47
2.3.1.1. Distance method .................................................................... 48
2.3.1.2. Step-voltage procedure.......................................................... 49
2.3.2. Audiofrequency twist method................................................. 52
2.3.3. Distortion-of-minimum method............................................... 53
2.4. Testing medium-voltage cables with DC or AC
voltage................................................................................... 55
2.4.1. Testing with DC voltage ......................................................... 55

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2.4.2. DC voltage testing of cables with PE or VPE insulation ........ 56
3. TECHNICAL DESCRIPTION 59
3.1. Specifications ....................................................................... 59
3.2. Functional description......................................................... 60
4. OPERATING 65
4.1. Safety measures................................................................... 65
4.2. Controls and displays.......................................................... 67
4.3. Burning.................................................................................. 69
4.4. Pre-locating........................................................................... 72
4.4.1. Pre-locating using the arc surge method ............................... 72
4.4.2. Measurement with the T 32/23 pre-locating unit.................... 72
4.4.3. Ground fault measurements................................................... 73
5. CARE, MAINTENANCE AND REPAIR 77
5.1. Care and maintenance ......................................................... 77
5.2. Repair .................................................................................... 77
5.2.1. Malfunctions ........................................................................... 77
5.2.2. Troubleshooting...................................................................... 78
5.2.3. Equipment failure ................................................................... 78

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TABLE OF FIGURES
Fig. 1-1 Dangers of search pulse location ....................................... 1-24
Fig. 1-2 Connection regulations ....................................................... 1-29
Fig. 2-1 Systematics of fault location and cable testing in power
cables.................................................................................. 2-35
Fig. 2-2 Reflection factor for ohmic faults and changes in cable
type...................................................................................... 2-38
Fig. 2-3 The branched network: idealised reflectograms................. 2-39
Fig. 2-4 Relationship between pulse width and reflectogram .......... 2-39
Fig. 2-5 Usable reflection equipment ............................................... 2-40
Fig. 2-6 Principle of ARM ................................................................. 2-41
Fig. 2-7 Principle of the decay method............................................. 2-43
Fig. 2-8 Test voltage in the cable ..................................................... 2-44
Fig. 2-9 Principle of magnetic field formation owing to differential
current ................................................................................. 2-46
Fig. 2-10 Pinpointing methods............................................................ 2-47
Fig. 2-11 Principle of pinpointing using the distance method............. 2-49
Fig. 2-12 Pinpointing using the step-voltage method (capacitive) ..... 2-51
Fig. 2-13 Fault location using the step-voltage method ..................... 2-51
Fig. 2-14 Twist measurement with search coil on a 2-wire cable ...... 2-53
Fig. 2-15 Pinpointing using the distortion-of-minimum method.......... 2-54
Fig. 4-1 Connection diagram for T 22/13 B 15 kV burn-out set ....... 4-69

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LIST OF ABBREVIATIONS
DIN Deutsche Industrie Norm
(German Industrial Standard)
ESF Energy Seperation Filter
HV High Voltage
IEC International Electrotechnical Commision
UVV Accident prevention regulations applicable in
Germany
VDE Verband Deutscher Elektrotechniker
(Association of German Electrotechnical
engineers)