MCT1605
Multi-Tap Automatic Current Transformer Saturation,
Ratio and Polarity Test Set
MCT1605
Multi-Tap Automatic Current Transformer
Saturation, Ratio and Polarity Test Set
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One button automated test: Demagnetization,
on multi-ratio CTs test all Knee Point,
Saturation, Polarity and Deviation, Winding
Resistance, Insulation Resistance, and Burden
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Displays multiple instantaneous Saturation
Curves with Knee Point
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Integrated 1 kV DC insulation test system
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Color daylight viewable graphical display
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“Save & Print Later” with USB stick
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Fast data entry using full QWERTY keyboard
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1600 VAC Saturation Test Voltage
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Automatic or manual testing selectable
DESCRIPTION
The Megger MCT1605 test set is a lightweight, robust,
portable unit used to automatically or manually perform
saturation, ratio, polarity, demagnetizing tests and
insulation tests on current transformers. The MCT provides
a microprocessor controlled variable voltage output
and precision instrumentation for automatically testing
single and multi-ratio CTs. The MCT1605 possesses
microprocessor controlled output voltage with precision
instrumentation and storage, reducing testing time and
increasing productivity. The MCT1605 will directly connect
to multi ratio CT’s and perform all three tests – saturation,
ratio and polarity – on all taps with the push of a button
and without changing leads. The MCT1605 has a large
display, permitting the user to easily read all pertinent data
while the test is being performed and providing the ability
to view the current transformer’s saturation curve.
Current transformers can be tested in their equipment
configuration, such as being mounted in transformers,
oil circuit breakers or switchgear. It is necessary for the
equipment to be completely isolated from the electrical
system prior to testing.
APPLICATIONS
Saturation Test
With the single push of a button, The MCT1605 performs a
CT saturation test and calculates the rated knee point. The
saturation test is performed at mains rated frequency of
50 or 60 Hz as required by IEC regulations. The MCT1605
will calculate the rated knee point in compliance with
IEEE C57.13.1, IEC 60044-1 or IEC 60044-6. While the
saturation test is being performed, The MCT will plot the
CT saturation curve on the large graphical display and
automatically provide the user with the rated knee point
per the desired IEEE or IEC standard. Many substation
CT’s include a multi-ratio secondary, therefore the
MCT1605 has the ability to plot and simultaneously display
up to 10 CT saturation curves.
Ratio Test
Ratio testing is performed by comparing a voltage applied
to the secondary winding to the resulting voltage produced
on the primary winding. For example, if 1 volt per turn is
applied to the secondary winding, the voltage present on
the primary winding would be 1 volt. More specifically, if
120 volts were applied to the secondary of a 600/5 current
transformer (120:1 ratio), 1 volt would be present on the
primary winding. This test is performed automatically
during a CT saturation test or manually with the output
control knob and metering display. The MCT1605 will
also provide the operator with a direct reading ratio, thus
removing the need to calculate CT ratio manually.
Polarity Test
Polarity of the current transformer under test is indicated to
the operator by a simple “Correct” or “Incorrect” indication
on the display accompanied by the measured phase angle.
Demagnetization
Normal operating conditions and typical winding resistance
measurements can cause a CT to become magnetized. The
MCT1605 has the ability to automatically demagnetize the
CT under test. This automatic demagnetization routine is
useful to ensure that the CT Saturation test yield correct
results. Prior to testing demagnification is recommended
per ANSI C57.13.1.
MCT1605
Multi-Tap Automatic Current Transformer Saturation,
Ratio and Polarity Test Set
CT Burden Measurement
In addition to performing any required CT test, the
MCT1605 has the ability to measure the actual connected
Burden. When the actual measured burden is compared
against the calculated burden, the user confirms that the CT
will operate with published rating.
Insulation Resistance Test
In order to ensure that the CT secondary wiring is properly
insulated, the MCT1605 system includes a 500/1000V
insulation resistance test system. This test ensures that the
CT secondary winding and secondary wiring is properly
insulated per ANSI C57.13.1.
The MCT1605 will also automatically switch the test leads
to perform all required insulation test. These test include
H-L, H-G, L-G
Note: Disconnect all electronic loads before performing this
test.
Winding Resistance
Measuring the DC resistance of transformer windings
will aid in identifying problems such as shorted or open
windings as well as loose connections.
Data Storage and Printing
The MCT1605 test system not only permits accurate and
automated CT testing, but also catalogues and stores
test results within the instrument for simple retrieval by
software at a later date. All catalogued test results can be
uploaded to Megger’s PowerDB
TM
Lite for report generation
and saturation curve plotting on a computer. PowerDB
Lite also has the ability to operate the MCT1605 with
no operator intervention, thus providing a completely
computer controlled automated test system.
Complete report generation with PowerDb Lite
The operator also has the option to print any catalogued
test results immediately using an optional printer, providing
hard copy of test reports immediately upon CT test
completion.
Onboard memory allows complete test results and data to
be stored in one complete file, permitting easy access to
quick construction of reports such as saturation curve with
knee point. The MCT1605 test file is saved in a Microsoft
XML format, thus the data is available to any application
that will accept an XML format.
With a manual voltage
output control knob, the
user is able to perform
any test required manually
if only a spot check is
required.
Upgradeability
The MCT1605 includes the ability to upgrade the user
interface and testing capability using updates supplied on
a USB memory device and a simple “upgrade” command.
This upgrade capability permits the MCT1605 system to
improve as new testing needs are developed.
FEATURES AND BENEFITS
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Direct Connection to Multi Ratio CT’s - The MCT1605
will directly connect to all taps on multi ratio CT’s to
eliminate lead changes required to test all interwinding
CT ratios, saturation curves and knee points. The
MCT1605 will test all programmed ratios with the push of
one button.
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Large Display - The large graphical display provides the
user with immediate. easy to read test results including
a plot of the CT saturation curve. This display also
provides the user with simple, easy to read test results for
Ratio and Polarity Test.
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CT Saturation, Ratio and Polarity Automated Testing
- The microprocessor-controlled output fully automates
testing of CT’s. This automated testing simplifies CT testing
and reduces testing time. Automated testing is accomplished
directly on the MCT1605 or via PowerDB Lite.
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CT Demagnetization - During operation and routine
DC winding resistance testing, it is possible for a CT
to become magnetized. The MCT1605 includes an
automated CT Demagnetization function, which allows
determination of accurate Knee Point as well as stable,
repeatable test results, and reduces test time.
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Insulation Test - The MCT1605 includes a 500/1000V
insulation test system to verify the CT secondary winding
and secondary wiring. This insures that the secondary
insulation has not degraded and will continue to perform
its function during high current faults.
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CT Burden Measurement - The CT Burden test ensures
that the CT secondary load is properly connected. A CT
load that is not properly connected can become a fire
hazard.
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CT Winding Resistance Testing - The CT Winding
Resistance test aids in identifiying shorted or open
windings and can also aid in identifying any loose
connections.
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Complete CT Testing - The MCT1605 system
provides a complete CT saturation, ratio and polarity
test. Eliminating the need for multiple pieces of test
equipment to perform a CT test. All test are performed in
compliance with IEEE C57.13.1 test guidelines.
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Full QWERTY Keyboard - The field ruggedized full
QWERTY keyboard simplifies nameplate data input.
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Test Result Report - The MCT1605 offers storage of
complete test files in an easy-to-use, versatile format
that permits upload to PowerDB Lite, or printing test
results using the optional external printer. These options
provide a simple, complete, easy way to store over 200
test results and saturation curves. All test results can be
catalogued and stored in the MCT1605.
MCT1605
Multi-Tap Automatic Current Transformer Saturation,
Ratio and Polarity Test Set
Saturation Curve and all test results displayed at a glance.
Manual testing screen.
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High Voltage Warning
Indication - The MCT1605
can produce a high voltage
output. To ensure the
safety of the user, a high
voltage warning is issued
via both the MCT1605 and
the PowerDB Lite interface
prior to the presence of any
output test voltage.
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Manual Operation - The
MCT1605 is also supplied with a manual voltage output
control knob. This permits the user to perform any test
required manually
if only a spot check is required. This allows the user to
ensure that test results are correct, assisting in diagnosis
of a faulty CT.
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Configurable Test Plans - Configurable Test Plans can
be associated with a specific CT and saved along with
results simplifying ongoing monitoring and profiling
of CTs.
Download test results to a USB device.
SPECIFICATIONS
Input
100 to 265 V, 1ø, 50 or 60 Hz, 15 A max.
Output
Continuously variable in four ranges:
0 to 40 V at 2.0 A max (5 minute on 15 minute off)
0 to 40 V at 5 A max for burden test
0 to 160 V at 2.0 A max (5 minute on 15 minute off)
0 to 800 V at 1.5 A max (3 min on, 15 min off)
0 to 1600 V at 1.0 A max (3 min on, 15 min off)
Instrumentation
Voltmeters
Output
41⁄2 digit, auto ranging
Resolution: 0.0000 to 1.9999/19.999/199.99/1999.9
Ranges: 0 to 40/160/800/1600 V
Accuracy: ±0.5% of reading, and ±.5% range typical
±1% of reading and ±1 V maximum
Input
41⁄2 digit, auto-ranging
Ranges: 0 to 2/600
Resolution: 0.0000 to 1.9999/19.999/199.99/600 V
Accuracy
2 V Range: ±0.5% of reading and ±0.25% range
600 V Range: ±0.5% of reading and ±0.5% range
Ammeter
41⁄2 digit
Range: 0.0000 to 1.0000A/5.000
Accuracy: ±0.85% of reading and ±1 LSD
Phase Angle
3 digits
Range: 0 to 360 degrees
Accuracy: ±1 degree*
MCT1605
Multi-Tap Automatic Current Transformer Saturation,
Ratio and Polarity Test Set
Ratio
Range Accuracy
0.8 to 5000 ±0.4% typical
±0.8% maximum
Ratio Test Frequency
55Hz internally generated providing a universal 50/60Hz test set
Winding Resistance
Measuring Range: .01Ω to 99.9Ω
Accuracy: <9.99Ω ±3% of reading ±2 digits
< 99.9Ω ±5% of reading ±2 digits
Insulation Test
Test Voltage: 1000 VDC, 500 VDC
Measuring Range: 10kΩ – 999MΩ
Short Circuit Current: 1.5mA nominal
Test Current on Load: 1mA at min. pass values of insulation
(as specified in BS7671, HD 384 and IEC 364)
Accuracy: ±3%, ±2 digits up to 10MΩ
±5%, up to 100MΩ
±30% up to full scale
Communication Interfaces
Ethernet/USB
Environment
Operating: -10º C to 40º C
Storage: -30º C to 70º C
Enclosure
The unit is housed in a rugged enclosure suitable for use in
outdoor substations.
Standards
IEC 61010, CSA 22.2, CE
Dimensions
7.5” H X 19.25” W X 15” D
(190 H X 489 W X 940 D mm)
Weight
47.6 lb (21.6 kg)
*at nominal voltage
ORDERING INFORMATION
Item (Qty) Cat. No.
MCT1605 Multi-Tap Automatic Current Transformer
Saturation, Ratio and Polarity Test Set MCT1605
Included Accessories
Line cord, North American (1 ea) 620000
Line cord, International color coded wire (1 ea) 15065
Test lead, H1 & H2, 40 ft, (1 ea) 620148
Test lead, X red, 20 ft, (1 ea) 2000-753
Test lead, X green, 20 ft, (1 ea) 2000-747
Test lead, X yellow, 20 ft, (1 ea) 2000-748
Test lead, X blue, 20 ft, (1 ea) 2000-749
Test lead, X white, 20 ft, (1 ea) 2000-746
Ground lead, green with yellow,
with large ground clip, 20 ft, (1 ea) 620151
Large test clip, red, 40mm opening, (1 ea) 640266
Large test clip, black, 40mm opening, (1 ea) 640267
UK
Archcliffe Road Dover
CT17 9EN England
T +44 (0) 1304 502101
F +44 (0) 1304 207342
UKsales@megger.com
UNITED STATES
4271 Bronze Way
Dallas TX 75237-1019 USA
T 800 723 2861 (USA only)
T +1 214 333 3201
F +1 214 331 7399
USsales@megger.com
Item (Qty) Cat. No.
Alligator clip, red, 4.1mm, (1 ea) 684006
Alligator clip, white, 4.1mm, (1 ea) 90000-882
Alligator clip, green, 4.1mm, (1 ea) 90000-883
Alligator clip, yellow, 4.1mm, (1 ea) 90000-884
Alligator clip, blue, 4.1mm, (1 ea) 90000-885
Soft side lead case 90001-165
USB memory stick 830029
Ethernet crossover cable (1 ea) 620094
Instruction book 80513
PowerDB Lite DB0001
Optional Accessories
Printer USB, battery operated, (1 ea) 830030
PowerDB, 1st copy with USB key DB1001S
OTHER TECHNICAL SALES OFFICES
Valley Forge USA, College Station USA,
Sydney AUSTRALIA, Täby SWEDEN,
Ontario CANADA, Trappes FRANCE,
Oberursel GERMANY, Aargau
SWITZERLAND, Kingdom of BAHRAIN,
Mumbai INDIA, Johannesburg SOUTH
AFRICA,
Chonburi THAILAND
ISO STATEMENT
Registered to ISO 9001:2000 Cert. no. 510006.002
MCT1605_DS_en_V01
www.megger.com/us
Megger is a registered trademark
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