Major tech MT Series User manual

USER'S MANUAL
for
HIGH VOLTAGE
PHASE COMPARATORS
MT Series
Double Poles
Model System Voltage Full Scale
MT6kV 6.6kV 8kV
MT11kV 11kV 12kV
MT22kV 22kV 24kV
MT33kV 33kV 36kV
MT44kV 44kV 48kV

2
INDEX PAGE
SAFETY RULES.............................................
GENERAL DESCRIPTION.............................
PRINCIPLE OF OPERATION.........................
PROVING THE PHASE COMPARATORS......
LIMIT MARK...................................................
LABELS AND MARKING................................
RANGE OF MODELS.....................................
INSTRUCTION FOR USE..............................
OPERATION...................................................
SPECIFICATIONS..........................................
SCALES.........................................................
DIRECTIONS FOR USE................................
TESTING FOR PHASING PRESENCE..........
CARE AND MAINTENANCE..........................
LIMITED WARRANTY.....................................
NOTES...........................................................
3
4
4
5
5
6
7
8
9
10
11
12
13
14
15
16

3
SAFETY RULES
●Only Personnel who are fully trained in the use of High Voltage
Phase Comparators should use this equipment.
●Be aware that the system that it will be used on are powered from
high voltages which are lethal.
●Before use, ensure that the Phase Comparators and any
accessories are clean, free from cracks or deep scores, and are
properly secured together.
●Only the proper rated Phase Comparators must be used. Ensure
that the Phase Comparator is properly rated for the voltage of
the system under test.
●Test the operation of the Phase Comparator before and after
each test.
●Do not allow any part of the Phase Comparator except the
contact electrodes to come in contact with energized or earthed
items.
●Safe Working distance must always be observed.
●Safety insulated Gloves and protective clothing and glasses
must be when using the Phase comparator.
●The Phase Comparator must be handled by one person only.
●Do not insert the Phase Comparator beyond its limit mark into
the apparatus under test. The Limit mark is the red band.
●The Phase Comparator should not be used as a synchronizing
device or a voltage detector.
●The Interconnecting lead/cord must not be allowed to come
within 100mm (10cm) of the hand guard and must not be
touched while testing.
●Before using the Phase Comparator in the testing of factory
assembled switchgear, the manufacturer of the switchgear
must be consulted as the suitability of the Phase Comparator in
such testing.
●Always check for Phase Presence before testing between
phases. Ensure that voltage is present on both phases
before testing between phases.
●The Phase Comparators are not to be subjected to a constant
voltage for a period longer than 1 minute in every ve minutes.

4
GENERAL DESCRIPTION
●The range of high Voltage Phase Comparators have been designed
to
comply with and exceed
the requirements of VDE0681Part5.
●The Phase Comparators are double pole devices which are
used to determine the correct Phase Relationship between
two energized conductors of the Same nominal Voltage and
frequency.
●Models are available to cover system voltages from 1kV to 44kV
50/60Hz.
●For other system voltage, please contact the factory.
●All models may be used indoor and outdoors in dry weather only.
●Meets IEC 61481 (excludes MT44kV)
PRINCIPLE OF OPERATION
●The MT range of Phase Comparators are resistive devices which
comprise mainly of resistors, a neon and a panel meter. The Phase
Comparator draws current from the circuit or source under test.
●The Phase Comparator consists of two inter-connected poles (the
master pole with the panel meter and the slave pole).
●The Master pole carries the panel meter with the colour coded
scale and the integrated neon light indicator.
●The colour coded scale indicates "in-phase/out-of-phase" band on
the scale. (Green = in-phase; Red=out-of-phase).
●The Neon light lights up when the voltage between the poles is
greater than ±1.2kV ±1.5kV.
●If two energized conductors are out-of-phase and a contact
electrode is touched onto each pole, current will ow between the
conductors through the resistors (resistors are inside the berglass
front end in each pole) in the poles and the interconnecting lead/
cord. This will cause the neon to illuminate and the panel meter's
indicator to move into the out-of-phase area (Red).
●If two energized conductors are in-phase and a contact electrode
is touched onto each pole, current will not ow between
the conductors through the resistors in the poles and the
interconnecting lead/cord. This should not cause the neon to
illuminate and the panel meter's indicator to move. The indicator
will stay into the in-phase area (Green).
●Ensure that voltage is present on both phases before testing
between phases.

5
PROVING THE PHASE COMPARATORS
●Before and after using a Phase Comparator and accessories, a
functional test should be performed on the Phase Comparator as
it is to be used on the source or circuit to test.
●A High Voltage Insulation tester can be used for this purpose.
●When using a High Voltage Insulation tester, the Phase
Comparator will indicate the voltage generated by that H.V.
Insulation tester.
●Please note that H.V. Insulation testers are generating DC voltage
and have polarity.
● The MT range of Phase Comparators are using a bridge rectier
and current only passes one way into the panel meter. However,
the neon must illuminate both ways.
●When proving with a DC source as with a H.V. Insulation tester,
the poles must be tested for both polarity to conrm that the panel
meter only show voltage in one way, but conrm that the neon
indicates both polarity.
●The reading on the High Voltage Insulation tester also indicates
the total value of the resistor chain and is also a good indication
that the circuit is still correct and in good condition (See
specications).
●A Proving Unit can also be used if a High Voltage Insulation
Meter is not available. The Proving unit does not indicate how
many mega ohms are in the front end or if the circuit is still in
good condition or not. The Proving unit will only output a DC
voltage of 5kVdc.
LIMIT MARK
●Each Phase Comparator has two poles.
●Each pole has a front end which is in Fiberglass tubing.
●Each pole has a Handle section.
●At the junction between the handle section and the front end
section, there is a RED BAND which is the limit mark.
● By denition, this mark, or the Red Band, indicates the physical
limit to which the poles of the Phase Comparators may be
inserted between live components or may touch them.

6
LABELS AND MARKING
●The following labels must be present on the Master Pole.
●The following labels must be present on BOTH Poles.
PHASE
COMPARATOR
11kV
Climatic Class - Normal
Outdoor
PHASE
COMPARATOR
6kV
Climatic Class - Normal
Outdoor
PHASE
COMPARATOR
22kV
Climatic Class - Normal
Outdoor
PHASE
COMPARATOR
11kV
Climatic Class - Normal
Outdoor
PHASE
COMPARATOR
33kV
Climatic Class - Normal
Outdoor
PHASE
COMPARATOR
44kV
Climatic Class - Normal
Outdoor
CONFORMS TO DIN VDE 0681/5
NOT FOR USE IN RAIN
CAN BE USED AS A VOLTAGE TESTER
DANGER: USE ON SYSTEMS UP TO
6.6kV ONLY AS PER INSTRUCTION MANUAL
6.6kV
DANGER: USE ON SYSTEMS UP TO
11kV ONLY AS PER INSTRUCTION MANUAL
11kV
DANGER: USE ON SYSTEMS UP TO
22kV ONLY AS PER INSTRUCTION MANUAL
22kV
DANGER: USE ON SYSTEMS UP TO
33kV ONLY AS PER INSTRUCTION MANUAL
33kV
DANGER: USE ON SYSTEMS UP TO
44kV ONLY AS PER INSTRUCTION MANUAL
44kV
Voltage System for this
Phase Comparator
Part Number
The Phase Comparator will
operate over the frequency
range 50 to 60 Hz
The Phase Comparator is
designed for use on
High Voltage Systems
The Phase Comparator will
perform correctly over
the temperature ranges
of -25˚C to + 55˚C
● Care must be taken to observe the attached labels, which must not be removed.
The labels warn of danger and to use only up to the rated voltage, as per
instruction manual. The Labels "Frequency Range", "Year of Manufacture",
"not to be used in the rain", "not to be used as voltage tester" are
self-explanatory and are to be strictly Observed.
WARNING
STAY BEHIND HAND GUARD
Read and Understand the
Instruction manual before
using the Phase Comparator
The Phase Comparator is suitable
for use either indoor or outdoor in
dry condition
The user must keep hands
and all parts of the body
behind the hand guard to
maintain safe working distances
(6.6kV)
MT6KV 50/60Hz MT11KV 50/60Hz MT22KV 50/60Hz MT33KV 50/60Hz MT44KV 50/60Hz
MT11KV 50/60Hz

7
RANGE OF MODELS
●Models are available to cover system voltages from 1kV to 44kV
@50 or 60Hz.
●Contact the factory for information on models suitable for other
voltages.
●The following models are available as standard instruments:
Model
N°
System
Voltage
Full Scale
Voltage
Maximum
Voltage
Display
Type
MT6kV 6.6kV 8kV 9kV Neon & Panel
Meter
MT11kV 11kV 12kV 15kV Neon & Panel
Meter
MT22kV 22kV 24kV 30kV Neon & Panel
Meter
MT33kV 33kV 36kV 40kV Neon & Panel
Meter
MT44kV 44kV 48kV 55kV Neon & Panel
Meter

8
INSTRUCTION FOR USE
●Before using the Phase Comparator, clean the Front End (Fiber
Glass) with a polymer polishing.
●All models do not require batteries and are being signal driven
(current taken from the source or circuit under test) and do not
require arming. However, it is recommended that a functional
test be carried out using a High Voltage Insulation tester or a
proving unit.
●To prove the Phase Comparator, set the voltage on the Proving
unit or on the High Voltage Insulation tester, to suit the model of
Phase Comparator. Turn the test "ON" or the proving unit "ON".
The Neon should light up (if the voltage if high enough) and the
indicator should move nearest the voltage measured.
●Reverse the poles of the Phase Comparator and check that an
out-of-phase indication is given.
●They are no user serviceable parts on our range of Phase
Comparators. Should the Phase Comparator become damaged,
faulty or, suspect in any form, please consult with your nearest
distributor to return it to the factory.
●There must be galvanic contact between the test electrodes and
the part of the installation under test and, no other part of the
phase Comparator, except the electrodes, should be in contact
with energized or earthed parts, in order to ensure accuracy of
the display.

9
OPERATION
To determine the correct phase relationship between two energized
conductors, the following procedure should be followed:
●First, Check that each Phase to be compared is individually
energized.
1. With one handle held in each hand, touch one bare conductor
(rst phase which will be compared later) with one contact
electrode and touch the earth with the other contact electrode.
2. The Neon will operate and the meter pointer will indicate the
Red out-of-phase band indication which indicate that this
phase is energized. The voltage scale will indicate the voltage
phase-to-Earth or/and the percentage of the full scale.
3. Repeat the operation 1 and 2 with the other bare conductor (the
other phase to be compared later) so that it is known that both
Conductors are energized.
●Now, you should know if both conductors are energized because
you will have read the voltage Phase-to-Earth of both conductors.
●If both phases are not energized, then, the remedial action will
have to be carried out before proceeding to the next stage of the
test.
●Compare the Phases.
●If both Phases are energized (after checking between Phase and
Earth that they are energized) proceed to compare between the
phases.
●Now touch each bare conductor (each phase to compare) with a
contact Electrode.
●If the conductors (Phases) are in-phase, the neon will not light
up and the meter pointer will not operate or the meter pointer
will stay in the Green band.
●If the conductors (Phases) are out-of-phase, the neon will
illuminate and the meter pointer will operate or the meter
pointer will go in the Red band.

10
SPECIFICATIONS
Safety Standard : IEC 61481
Electrical
MT6kV MT11kV MT22kV MT33kV MT44kV
Total Resistance 4.48MΩ 6.78MΩ 10.82MΩ 19.68MΩ 26.8MΩ
Response time <1Sec <1Sec <1Sec <1Sec <1Sec
Neon Threshold 1.2kV 1.2kV 1.2kV 1.2kV 1.2kV
Neon Lit Fully @ 1.5kV 1.5kV 1.5kV 1.5kV 1.5kV
Mechanical
MT6kV MT11k V MT22kV MT33kV MT44kV
Length of Handle 775mm 775mm 775mm 775mm 775mm
Length Front end 400mm 400mm 500mm 665mm 820mm
Total Length 1.175m 1.175m 1.275m 1.440m 1.595m
Total Weight 2.1kg 2.1kg 2.2kg 2.4kg 2.5kg
Handle Material Composite Material with Polyurethane
Front End Fiber Glass Wound Tubing
Vibration Resistance : tested in accordance with IEC 60068-2-6
Drop Resistance : tested in accordance with IEC 60068-2-31
Shock Resistance : tested in accordance with IEC 60068-2-75
Climatic Resistance : tested in accordance with IEC 60068-2-14
Deection : the contact electrodes must not deect by more than
150mm when loaded at the electrode by 10N.
Connection Lead.Cord Strength : each pole connection to
withstand 10000 swing with 10N Load applied and a
vertical pull with 200N applied.
Environmental :
Operating temperature: -25°C to +55°C
Operating Humidity: 20 to 96% RH.

11
SCALES
MT6kV MT11kV MT22kV MT33kV MT44kV
Special Scales and conguration can be manufactured on a case by
case basis. Contact the factory with your requirements.

12
DIRECTIONS FOR USE
It is the user's responsibility to ensure that only competent
personnel, with the necessary knowledge and training to work with
high voltage, use and handle this equipment.
Before using the Phase Comparators, it is recommended to check
them with a High Voltage Insulation tester (if possible a variable
one).
For Phasing, it must be ensured that both feeders are in a live
condition, of the same voltage and in a stable state, before
commencing the phasing tests.
The Phase Comparators comprises of two interconnected parts;
these are the Master Stick, containing the indicator housing. The
second stick is referred to as the slave.
REPRESENTATION FOR EXPLANATION PURPOSE
Interconnecting Lead
Master Stick Slave Stick
M-S S-S
Main (Master) Stick
Protective Cover
Slave Stick
Hand Grip
Insulating element
Resistive element
Hand Grip
Red Band (Limit Mark)
Hand Guard
Front End (Slave)
Front End (Master)
Split Probe
(Contact electrode)
Contact Electrode
(Split Probe)
Interconnecting Lead
Indicator Housing

13
FEEDER “1” FEEDER “2”
FEEDER “1” FEEDER “2”
Phase “A” Phase “C”
Phase “B” Phase “B”
Phase “C” Phase “A”
M-S S-S
M-S S-S
M-S S-S
Earth
M-S S-S
Earth
Phase “A” Phase “A”
Phase “B” Phase “B”
Phase “C” Phase “C”
FEEDER “1” FEEDER “2”
Phase “A” Phase “A”
Phase “B” Phase “B”
Phase “C” Phase “C”
TESTING FOR PHASE PRESENCE
Before doing the Phase Comparison test, you must ensure that the
feeders to be compared are live.
Example: Preparing to
Compare two Phases
From di󰀨erent feeders
Check that both phases to
be compared are Live and
have the same amplitude.
To check Phase presence,
measure the Voltage between
Phase and Earth. The result
will conrm that voltage
is present and that the
amplitude are the same.
TESTING FOR PHASING
No Indication - Neon OFF (does not illuminate) = IN PHASE
Indication - Neon ON (does light up) = OUT OF PHASE
Note that the links must be arranged so that the phases are
Connected in Phase, as indicated by the dotted lines.
Do Not Use Phasing Sticks unless you have been fully trained
In High Voltage work and understand the system fully.

14
CARE AND MAINTENANCE
●Storage: The Phase Comparator and it's accessories should be
stored in the proprietary carrying case/bag when not in use.
●Transporting: When the equipment is in transit it should be
stored in its carrying case/bag. Whilst the equipment has been
designed for eld use it should not be subjected to excessive
bumps and shocks.
●Cleaning: Dirt can cause surface tracking and it's therefore
necessary to keep the Phase Comparator and its accessories
clean by washing them in mild detergent solution. All parts should
be cleaned with the appropriate liquid.
●Mechanical Damage: If surface scratches or dents can easily be
seen by the naked eye, then the equipment should be returned
to the factory or your nearest distributor for repairs since these
blemishes act as traps for dirt and moisture. Mechanical damage
would also necessitate the return of the equipment to the
manufacturer.
●Recalibration
and Proof Testing: Every twelve months the
Phase Comparator and its accessories should be re-checked.
This would include checking the threshold level of the neon,
voltage proof testing in factory or accredited laboratory and
pressure testing of the panel meter housing.
Please note that there are no internal user replaceable parts.
The Phase comparator must always be clean and dry before
use and during use. Please store the Phase Comparator in a
dry place.

15
LIMITED WARRANTY
We warrant the product manufactured by us to be free from
defective material or factory workmanship and agree to repair or
replace this product which, under normal use and service, disclose
the defect to be the fault of our manufacturing, with no charge for
parts and service.
If we are unable to repair or replace this product, we will make a full
refund of the purchase price. Consult the user's manual for proper
instruction regarding use of this instrument. Our obligation under
this warranty is limited to repairing, replacing or making refund of
this test equipment which proves to be defective within twenty four
months from the date of purchase.
This warranty does not apply to any of our products which have
been repaired or altered by unauthorized persons in any way so as,
in our sole judgement, to injure their stability or reliability, or which
have been subject to misuse, abuse, misapplication, negligence or
accident or which have had the serial numbers altered, defaced or
removed.
All warranties implied by law are hereby limited to a period of twenty
four months, and the provisions of the warranty are expressly in lieu
of any other warranties expressed or implied.
The purchaser agrees to assume all liability for any damages or
bodily injury which may result from the use or misuse of the product
by the purchaser, or it's user, his employees, or others, and the
remedies provided for in this warranty are expressly in lieu of any
other liability we may have including incidental or consequential
damages.
We reserve the right to discontinue models at any time, or change
specication, price or design, without notice and without incurring
any obligation.

16
NOTES
We exceeded the safety specications wherever possible. However,
we can't be held liable for misuse or bad manipulation.
We simplied the Phase Comparators by not having any parts
to assemble on site. There is no user serviceable parts or user
assembled part in our Phase Comparators.
Only the tip (contact electrode) must be screwed on the front end of
each pole. They generally do not need to be removed by the user.
For other kind of tips and contact electrodes, contact the factory or
your nearest distributor.
Getting regular training on your High Voltage equipment and on the
electrical network / grid you are working on is good practice and will
help in keeping you safe.
Always make a sketch before proceeding with testing High Voltage
and ensure you are fully in control of the testing and understand fully
what is going on. Failure to do so can result in fatal accidents.
www.major-tech.com www.majortech.com.au
[email protected] [email protected]
MAJOR TECH
(PTY) LTD
South Africa Australia