Megger SWG 500 User manual

Produktbild wie in den Prospekten ohne Rahmen
Ansprechpartner Frau Badziura
Issue: 02 (10/2017) – EN
128312842
Operating Manual
SHOCK DISCHARGE GENERATOR
SWG 500

II

SWG 500
III
Consultation with Megger
The present system manual has been designed as an operating
guide and for reference. It is meant to answer your questions and
solve your problems in as fast and easy a way as possible. Please
start with referring to this manual should any trouble occur.
In doing so, make use of the table of contents and read the relevant
paragraph with great attention. Furthermore, check all terminals and
connections of the instruments involved.
Should any question remain unanswered, please contact:
Megger Limited Seba Dynatronic
Mess- und Ortungstechnik GmbH
Archcliffe Road
Kent CT17 9EN
T: [phone]
F: [phone]
E: [e-mail]
Dr.-Herbert-Iann-Str. 6
D - 96148 Baunach
T: [phone] – 0
F: [phone]
E: [e-mail]
Hagenuk KMT
Kabelmesstechnik GmbH
Megger USA
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 disclaim all responsibility for damage resulting
directly or indirectly from the delivery, supply, or use of this matter.

2
Terms of Warranty
Megger accept responsibility for a claim under warranty brought
forward by a customer for a product sold by Megger under the terms
stated below.
Megger warrant that at the time of delivery Megger products are free
from manufacturing or material defects which might considerably
reduce their value or usability. This warranty does not apply to faults
in the software supplied. During the period of warranty, Megger agree
to repair faulty parts or replace them with new parts or parts as new
(with the same usability and life as new parts) according to their
choice.
Megger reject all further claims under warranty, in particular those
from consequential damage. Each component and product replaced
in accordance with this warranty becomes the property of Megger.
All warranty claims versus Megger are hereby limited to a period of
12 months from the date of delivery. Each component supplied by
Megger within the context of warranty will also be covered by this
warranty for the remaining period of time but for 90 days at least.
Each measure to remedy a claim under warranty shall exclusively be
carried out by Megger or an authorized service station.
To register a claim under the provisions of this warranty, the
customer has to complain about the defect, in case of an immediately
detectable fault within 10 days from the date of delivery.
This warranty does not apply to any fault or damage caused by
exposing a product to conditions not in accordance with this
specification, by storing, transporting, or using it improperly, or having
it serviced or installed by a workshop not authorized by Megger. All
responsibility is disclaimed for damage due to wear, will of God, or
connection to foreign components.
For 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.

3

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Contents
1Description 1
1.1 General 1
1.2 Technical data 1
1.3 Design 2
1.4 Current supply 2
2Putting into operation 3
2.1 Safety 3
2.2 Earthing of the instrument 3
2.3 Connection to the faulty cable 3
2.4 Isolation of open cable ends 4
2.5 Selection of the surge voltage 5
2.6 Safety terms as per VDE 0104 5
2.6.1 Ready for mains connection 5
2.6.2 Ready for operation 5
2.6.3 Ready for switching on 6
2.7 Mains connection 6
2.8 Setting the surge voltage 7
2.9 Selecting the surge output 7
2.9.1 195 Ws operation 7
2.9.2 500 Ws - operation 7
2.10 Switching the instrument on 8
2.11 Setting the Impulse sequence 8
2.12 Single-shot pulse 9
3Switching Off 11
4Description of operating and connecting panel 13

1
1 Description
1.1 General
The shock discharge generator SWG 500 is used for the
location of cable faults, by generating flashovers or punctures
at the weak point of the cable insulation. For this purpose, the
four impulse capacitors are charged and then discharged into
the faulty cable via an operating spark gap. This discharge
creates a flash-over noise at the fault, which is picked up on
the ground surface by means of a geophone microphone,
amplified via a receiver/amplifier FLE 66 or FLE 90, and then
indicated acoustically and/or optically
IMPORTANT:
The SWG 500 is a high voltage instrument. Hence, the safety
precautions have imperatively to be observed. These can be
found under paragraph 2.1. on page 3.
1.2 Technical data
Surge voltages :
a) 2,5 - 5 - 10 kV
b) 4 - 8 - 16 kV
Output :
195 Ws at 2,5 / 5 / 10 kV
500 Ws at 4 / 8 / 16 kV
Impulse sequence :
single-shot pulse or 1,5 - 6 seconds
Power supply :
220/240 V, 45-60 Hz
Current consumption :
2,5 A (average value)
Meter :
0 - 20 kV (direct measurement)
Weight :
45 kg
Dimensions (LxHxB) :
520 x 255 x 500
Standard accessories :
a) Power cable NK-G 01
b) Earthing cable EK 01
c) 4 m high voltage cable HSK 13
d) Operating manual
Special accessories :
e) Protective cover SD 50

2
1.3 Design
The shock discharge generator SWG 500 is a completely self-
contained instrument and can be operated without any
additional units. The four main sub-assemblies viz control unit,
high voltage generator, impulse capacitors and the operating
spark gap are mounted in a rugged 19’’-housing. Modern
indicating and sensor elements, combined with VDE indicating
elements (VDE 0104) facilitate operation and handling of the
instrument.
A built-in kV meter indicates the surge voltage and measures
the high voltage directly at the capacitor bank.
All operational and indicating elements are mounted an the
front panel of the instrument. The connections for the power
supply, earthing cable and the high voltage output have been
provided at the rear of the instrument.
The connection of the instrument on the high voltage side to
the faulty cable is made by means of a 4 m high voltage lead
with a high voltage plug connector. The instrument cannot be
put into operation unless this high voltage lead is connected.
1.4 Current supply
The SWG 400 is operated from a 220 V AC mains with a
frequency of 45 to 60 Hz. For 240 V operation, an internal
voltage matching for the mains supply of the control unit has
been provided. If the instrument is to be operated from a 110
V AC mains, the high voltage transformer has to be replaced.
The connection change-over for the transformer of the control
unit for 110 V operation has been provided.

3
2 Putting into operation
2.1 Safety
The shock discharge generator SWG 500 releases dangerous
contact voltages. Hence the instrument must be operated by
specialists or personnel who have been trained or instructed in
the use of the instrument. The following safety precautions
should be adhered to:
Para. 2.2.
Earthing of the instrument
Para. 2.3.
Connection to the faulty cable
Para. 2.4.
Isolation of open cable ends
Para. 2.5.
Selection of a suitable surge voltage
Para. 2.6.
Safety terms
2.2 Earthing of the instrument
Prior to putting into operation, the Instrument has to be
earthed. For this purpose, the earthing terminal (13) is to be
connected to a reliable protective earth by means of the
earthing lead supplied. The protective earthing provided
through the earthing contact of the mains supply lead is not
sufficient.
2.3 Connection to the faulty cable
The plug of the high voltage lead is connected to the high
voltage socket (15) and is secured by means of the fixing
screw. Now a micro contact inside the instrument closes and
renders the instrument ready for the connection of a mains
supply.

4
After the faulty cable has been disconnected and verified to be
dead, the high voltage lead can be connected. For this
purpose, the wire clamp is fixed to the faulty phase conductor,
whereby care should be taken to ensure a good contact. The
sheath clamp is screwed onto the sheath or screen of the
defective cable. Additionally, in the case of a fault between
two cores, one of these cores has to be connected to the
sheath or screen and in the event of plastic cables, to systems
earth.
2.4 Isolation of open cable ends
Since the high voltage impulses applied to the defective cable
assume dangerous values, the cable ends must be isolated as
per VDE 0104 in order to avoid physical contact. This also
goes for teed low voltage cables which, if need be, have to be
disconnected in order to avoid flashovers in the installations or
terminal boxes.
Only when dealing with longer cables (exceeding 100 m) it is
recommended to short-circuit and earth one cable end. In
spite of the shorted conductors, a flashover can be obtained at
the fault.

5
2.5 Selection of the surge voltage
The selection of the surge voltage depends both an the test
voltage of the faulty cable and an the ignition behaviour of the
fault. The ignition behaviour is governed not only by the
voltage level, but also by the duration of the surge impulse.
The latter again mainly depends on how the Impulse
capacitors are connected.
In practice, 2,5 or 4 kV are recommended for low voltage
cables. In the event of medium or high voltage cables, it might
be necessary to determine the surge voltage to be set by trial.
In this case one should always start with the lowest voltage of
2,5 kV.
Surge impulses which do not cause a flashover are reflected at
the cable end, whereby their impulse voltage is doubled. This
fact is to be taken into account as laid down by VDE 0298.
2.6 Safety terms as per VDE 0104
2.6.1 Ready for mains connection
Indicated by a white pilot lamp (6).
Mains voltage is connected.
Instrument is not on.
2.6.2 Ready for operation
Indicated by a green pilot lamp (7).
Instrument is on.
No high voltage.
Output earthed.

6
2.6.3 Ready for switching on
Indicated by a red pilot lamp (5).
Instrument is on.
Green pilot lamp goes out.
Caution: HIGH VOLTALE IS ON !
*NOTE:
If the green pilot lamp goes out and the red pilot lamp does
not light up, the instrument is also ready for switching on!!
2.7 Mains connection
The earthed power supply lead supplied is connected to
socket (14). The mains voltage should be 220 - 240 V. A
mains frequency of 45 - 60 Hz is permissible.

7
2.8 Setting the surge voltage
Only in switching state "Ready for mains connection". (Only
the white pilot lamp lights up). The desired surge voltage is set
on the high voltage change-over switch (12). For this purpose,
the knob in "OFF" position is pulled out, turned to the desired
voltage and firmly depressed (rotary plug-in switch). If the
instrument is switched on, but the high voltage switch has not
been properly set, a locking magnet prevents an operation of
this switch.
The voltages which can be selected on this switch, are
coupled with each other
Position I :
2,5 kV (195 Ws)
or
4 kV (500 Ws)
Position II :
5 kV (195 Ws)
or
8 kV (500 Ws)
Position III :
10 kV (195 Ws)
or
16 kV (500 Ws)
2.9 Selecting the surge output
2.9.1 195 Ws operation
In the normal position, the instrument is set to 195 Ws. This is
indicated by the yellow illuminated pushbutton (8) after
switching on.
2.9.2 500 Ws - operation
For the purpose of setting the surge output of 500 Ws, operate
pushbutton (9) with the instrument switched on. This switching
state is indicated by the same illuminated pushbutton (9).

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2.10 Switching the instrument on
Prerequisites:
a) Earthing of the instrument
b) Connection to the faulty cable
c) READINESS FOR MAINS CONNECTION
(white pilot lamp).
Operation
I:
Luminous pushbutton (6) white
Result
:
Pushbutton (6) continues lighting
Switching state
I:
READY FOR OPERATION
Indication
:
Luminous pushbutton (7) green
Operation
II:
Luminous pushbutton (7) green
Result
:
Luminous pushbutton (7) goes out
Switching state
II:
READY FOR SWITCHING ON
or High Voltage connected resp.
Indication
:
Luminous pushbutton (5) red
Meter
:
kV-meter 2,5/5/10 kV
Indication
II:
Luminous pushbutton (8) yellow, 195 Ws
at 2, 5 - 5 or 10 kV resp.
This is the normal position.
or after corresponding preselection:
Indication
II:
Luminous pushbutton (9) yellow,
500 Ws at 4 , 8 or 16 kV resp .
2.11 Setting the Impulse sequence
Rotary control (11) is combined with a rotary switch. When the
rotary control is turned fully to the left, the automatic impulse
sequence is switched off (single-shot impulse). If the rotary
control is turned to the right (clockwise), then the impulse
sequence can be continuously selected after the switching
point has been passed. The shortest impulse sequence (fully
to the left) is 1,5 seconds and the longest (fully to the right) 6
seconds. One scale division corresponds to approx. 0,5
seconds.

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2.12 Single-shot pulse
In order to trigger single-shot pulses, e.g. by radio command,
the rotary control (11) is to be set fully to the left, whereby a
switching off point has to be crossed. A single-shot impulse is
triggered by means of pushbutton (10).

11
3 Switching Off
After completion of the test, the instrument is switched off by
operating the luminous pushbutton (5), whereby both the
control unit and the high voltage generation are switched off.
Simultaneously, the instrument is automatically discharged
and the connected cable is earthed. The pointer of the kV-
meter returns to Zero.
Important:
Prior to disconnecting the high voltage lead from the cable
under test, both connections have to be touched with an
earthing rod in order to ensure a "visible" discharge and
earthing.

13
4 Description of operating and connecting panel
Figure 1 : Operating and connecting panel
(1)
kV-meter :
0 - 20 kV
(2)
Microfuse/Mains circuit :
F3 (M0.8/250 C)
(3)
Microfuse/Mains circuit :
F1 (T4/250 E)
(4)
Microfuse/Control circuit :
F2 (T4/250 E)
*(5)
Luminous pushbutton
(red) :
"READY FOR SWITCHING
ON"
when operated : "OFF"

14
*(6)
Luminous pushbutton
(white) :
"READY FOR MAINS
CONNECTION"
when operated : "ON"
*(7)
Luminous pushbutton
(green) :
"READY FOR
OPERATION"
when operated : "H.V. ON"
(8)
Luminous pushbutton
(yellow) :
195 Ws at 2.5/5/10 kV
(9)
Luminous pushbutton
(yellow) :
500 Ws at 4/8/16 kV
(10)
Pushbutton (blue) :
single-shot trigger
(11)
Rotary switch :
Impulse sequence
1.5 - 6 s/pulse
(12)
High voltage range
selection switch :
2.5/5/10 - 4/8/16 kV
(13)
Earthing terminal
(14)
Mains connection
socket :
220 V, 45 - 60 Hz (or other
voltages).
(15)
High voltage output :
For the H.V. output leads.
(16)
NAG connector
(17)
Key switch
* IMPORTANT:
The illuminated pushbuttons 5/6/7 have dual functions
a)
Pushbutton for operation
b)
Pilot lamps for indication of the switching state of the
instrument.