Megger LCI TX User manual

LCI TX / LCI TX-440
Cable Identifying Generator
USER GUIDE
Issue: B (10/2021) - EN

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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 Megger Germany GmbH (Baunach)
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: [email protected]om
Megger Germany GmbH (Radeburg) Megger USA
Röderaue 41
D - 01471 Radeburg / Dresden
T: [phone] – 0
F: [phone]
E: [email protected]om
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.

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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.

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Table of Contents
1Safety Advice ........................................................................................................................ 7
2Technical Description............................................................................................................ 8
3Scope of Delivery ................................................................................................................ 10
4Design................................................................................................................................. 11
5Safety Mechanisms............................................................................................................. 12
6Electrical Connection to Cable Under Voltage .................................................................... 13
6.1 Connecting to power outlet .......................................................................................................14
6.2 Connecting to low voltage distribution lines..............................................................................14
6.3 Direct Connection to LV HRC fuses (Optional).........................................................................16
7Operating ............................................................................................................................ 18

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1 Safety Advice
Safety
precautions
This manual contains basic advice for the installation and operation of the
LCI TX and LCI TX-440 cable identifying generators. It is essential to make
this manual accessible to the authorised and skilled operator. He needs to
read this manual closely. The manufacturer is not liable for damage to
material or humans due to non-observance of the instructions and safety
advices provided by this manual.
Locally applying regulations have to be observed.
Symbols used in
this manual
Important instructions concerning the protection of staff and equipment as
well as technical safety within this document are labelled with one of the
following symbols:
Symbol Description
Notes have important information and useful tips on the
operation of your equipment. Non-observance may result
in useless measurement results.
CAUTION
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury or
material damage.
Working with
equipment of
Megger
All electrical regulations of the country where the system is operated have
to be observed as well as national regulations for prevention of accidents
and existing regulations for the safety and operation of equipment of the
involved companies.
Original accessories ensure safe operation of the equipment. It is not
allowed and the warranty is lost if other accessories than the original ones
are used with the equipment.
Intended
application
The cable identifying generators LCI TX and LCI TX-440
may only be
operated at live low-voltage cables, measurement category 600 V / CAT IV
(EN 61010-1), according to their intended application.
Safe operation is only realised when using the equipment for its intended
purpose.
The limits described under technical data may not be exceeded.

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2 Technical Description
Function The cable identifying generators are used for selective cable identification
on 100 V … 240 V (LCI TX) or 240 V … 440 V (LCI TX-440) live low-
voltage cables.
For such a cable identification procedure, the receiver CI RX is required
additionally. The handling of the receiver is described in a separate
operation manual.
The generator sends out pulses up to a peak current value of 90 A into the
cable to be identified. This test current generates an electromagnetic field
around the cable which is picked up by a flexible identification clamp
attached to the cable.
The test current of these identification permits a determination of the
current value and of the direction of the measuring pulse, thus leading to a
safe and reliable identification of the cable.

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Technical data Parameter Value
Indicators oPower status LED (green)
oLED for pulse, polarity and error
indication (red)
Operating voltage
oLCI TX
o
LCI TX-440
100 V … 240 VAC 50/60 Hz
240 V … 440 VAC 50/60 Hz
Pulse current 80 A ±10 A
Pulse sequence 30 per minute
Pulse width 1.7 ms
Weight 0.5 kg
Dimensions 151 mm x 101 mm x 60 mm
Protection class1IP 54
Operating temperature -10°C … 60°C
Operating humidity Max. relative humidity 93% at 30°C
Storage temperature -10°C … 60°C
Measurement category
(EN 61010-1)
oLCI TX
oLCI TX-440
Connected via MK 37: 300 V / CAT II
Connected via NK 9 and fused clip:
1000 V / CAT III, 600 V / CAT IV
1000 V / CAT III, 600 V / CAT IV
1The specified IP code (protection against dust and water) can only be assured, if fitting plugs are plugged into all
sockets or the sockets are covered with the corresponding protective caps.

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3 Scope of Delivery
Standard scope of
delivery
The following items are included with the standard shipment of the LCI TX /
LCI TX-440 generator:
•Black measuring lead with fused alligator clip, 2.0 m
•Blue measuring lead with fused alligator clip, 2.0 m
•Yellow/green measuring lead with alligator clip, 2.0 m
Optional
accessories
The following accessories can be ordered by your Megger representative, if
required:
Accessory Description Order number
Case Suitable for a complete cable
identifier system
90004532
Measuring lead
MK 55
Adapter for direct
measurement on LV HRC
fuses (type 00 … 03)
820025178
Measuring lead
MK 37
Measuring lead for direct
connection of the LCI-TX /
LCI TX-440 to a power outlet
118304682 (EU)
90020744 (UK)
90020743 (US)
2011453 (AU/CN)

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4 Design
The LCI TX(-440)
identifying generator is built into a sturdy ABS plastic
housing. The unit is in protection class IP 54.
The following figure shows the generators and their indicators and sockets:
Item Description
Power status LED
LED for pulse, polarity and error indication
LCI TX: Laboratory sockets for
direct connection to power
outlets or low voltage lines up to 240 V
LCI TX-440:
Laboratory sockets for direct connection to low
voltage lines up to 440 V
3
1
2
1
2
3

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5 Safety Mechanisms
Overvoltage
protection
The generator has a built-
in overvoltage protection. If a voltage > 270 V
(LCI TX) or >460 V (LCI TX-440)
is detected, the fuses blow and, thus,
protect the unit from being destroyed.
After the overvoltage protection has been responded, it is nec
essary to
change both internal 5A F fuses (high breaking capacity) in order to put the
generator back to operating state.
Over-temperature
protection
At too high temperatures, the pulse transmission is automatically stopped
until the temperature has dropped below a certain threshold. If the over-
temperature protection is active, both LEDs are lit permanently and the
audible indicator does not sound.

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6 Electrical Connection to Cable Under Voltage
Introduction The generator has to be connected to the open distal (load) end
of the
cable. Proper cable identification using the CI RX
can only be performed
between the transformer and the generator.
CAUTION
Connection sequence
Greatest care must be taken when connecting the generator to ensure
that the protective and neutral conductor are connected securely first.
Only then may the live phase conductor be connected. Disconnect in
reverse order: first disconnect the phase conductor, then the protective
and neutral conductor.

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6.1 Connecting to power outlet
When connecting the
generator to a power outlet in measurement
category CAT II (EN 61010-1) environment, the MK 37 measuring lead
can be used.
When connecting the generator
in combination with special plugs /
sockets, make sure a connection to PE is established.
6.2 Connecting to low voltage distribution lines
Measuring leads The LCI TX / LCI TX-440 is connected to open distributors by means of
the measuring leads (black, blue and yellow/green). It is essential that the
measuring leads are connected to the generator in accordan
ce with the
colour coding!
To prevent arcing in the event of a short circuit in the system measuring
lead, the blue and the black test terminals are fitted with 10 A fuses. The
maximum switch load of these fuses is 50 kA.
Connection
between phase
and earth
When connecting for normal cable identification according to the current
impulse method, proceed as illustrated in the picture below:
The alternating voltage between the outer conductor and neutral
conductor should be at le
ast 240 V, so that the identifying generator
can draw the maximum possible pulsed current.
PEN PEN
Transformator

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Connection
between phases
(LCI TX-440)
The LCI TX-440 generator can also be connected between two phases of
a multi-conductor cable. With this type of connection, the identification of
the cable is performed according to the “Twisted-Field” method by
means of the optional TFS CI sensor (moved along or around the cable).
The black and the blue test lead must be connected to any two phases of
the cable. The use of a
protective conductor is not necessary from a
metrological point of view, is recommended however for safety reasons.
Due to its limited overvoltage protection, the identifying generator LCI
TX is not suitable for phase to phase connection!
PEN PEN
Transformer

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6.3 Direct Connection to LV HRC fuses (Optional)
Using the measuring cable MK 55 (available as a special accessory) the
both generators, the LCI TX and the LCI TX-440,
can be directly
connected to LV HRC fuses of size 00 – 3 (6 … 630 A).
CAUTION
Observe the following safety instructions when using the measuring
cable MK 55:
•The measuring cable MK 55 may only be used by qualified electricians
or persons who have been instructed in electrical principles.
•Only safety handles conforming to DIN VDE 0636-201 (EN 60269-2) or
DIN VDE 0680-4 (for work performed under live voltage) may be used
for operation.
•When performing assembly work under live voltage, the work-specific
instructions and documentation of the network operator, as w
ell as
national safety regulations (such as the German TRBS 2131) are to be
observed.
•It is not intended that the fuse in the plug-in adapter of the measuring
cable be replaced by the user.
Connect to an LV HRC fuse as follows:
Step Description
1 Connect the identifying generator to the protective conductor
with the yellow/green measuring lead and to the neutral
conductor with the blue measuring lead.
2 The front part of the black alligator clip on the black measuring
cable must be exchanged for the screw-on adapter supplied
with the MK 55. The existing fuse must continue to be used.
Afterwards, the MK 55 can be attached to the black measuring
lead.
3 Connect the MK 55 to the generator.
When using the LCI TX-440 generator, the measuring lead has
to be connected to the black terminal.

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Step Description
4 Insert the plug-
in adapter in the LV HRC fuse replacement
handle.
5 Push the plug-in adapter onto the upper contact blade so that it
attaches securely to the fuse attachment.
6 Detach the LV HRC fuse replacement handle.
7 After the cable identification
, disconnect by reversing this
sequence of steps.

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7 Operating
Polarity check
The identifying generator switches itself on automatically after being
connected to the cable.
Subsequently, the generator automatically checks the polarity.
This is
necessary as the CEE 7/7 (Schuko) plug of the mains supply lead MK 37
may have been connected the wrong way round.
Depending on the polarity, the system responds as follows:
Correct polarity Wrong polarity
Green LED is lit
Red LED is flashing
and an audible
indicator sounds in
time with the
transmitted pulses
Green LED is off
Red LED is lit
In the case of wrong polarity, the polarity of the connection lead has to be
changed (the NKG 1 CEE 7/7 (Schuko) plug has to be turned round). The
connection lead must not be reconnected before the device has totally
turned off after appr. 3 seconds (both LEDs go out).
If the polarity change does not affect the LED status, it must be assumed
that the protective earth conductor is not connected. In this case, testing
cannot be carried out.
Practical use Once the polarity check has been successfully completed, the identifying
generator should be in operating status. The LEDs should now indicate
that the unit is working perfectly. The pulse indicator and an audible signal
should indicate a measuring pulse every 2 seconds. Cable identification
can now be started using the CI RX identifying receiver with the flexible
clamp.
A detailed description of the procedure is provided in the operating CI RX
operating manual.
The identification of the test signal can be impaired by asymmetrical
operating currents in the cable as well as by pulse shaped noise.

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CI RX
Cable Identifying Receiver
USER GUIDE
Issue: B (10/2021)
EN