True Three-Phase Transformer
Turns Ratio Tester TRT4x
Specially designed option for testing capacitive voltage transformers
Test voltages from 1 to 125 V AC
Up to 5 kV AC with additional CVT40
Turns ratio range 0,8 – 15 000
The best turns ratio accuracy of 0,05%
Single-phase test voltage
True three-phase test voltage
Automatic vector group detection
Detailed analysis of test results using DV-Win software
Interchangeable test leads with Three-phase Winding Ohmmeters & Tap Changer
Analyzers TWA
Description
TRT4x is a true three-phase, fully automatic test etc.) without a need to switch the test hookup
set specially designed for turns ratio, phase cables. In addition, it can perform the test with
shift, and excitation current measurements of true three-phase test voltage, allowing testing
power, distribution and instrument transformers. any transformer type. Following the test, it
TRT4x determines the transformer turns ratio by displays a turns ratio, phase shift, and excitation
applying voltages across high voltage windings, current obtained with single-phase and/or true
accurately measuring voltages across the three-phase tests.
unloaded transformer windings, and then
TRT4x lets users enter a transformer’s
displaying the ratio of these voltages.
nameplate voltages for the turns ratio deviation
TRT4x is based on a state of the art technology, calculation. This feature eliminates any error
using the most advanced technique available otherwise caused by an operator’s manual
today. The test set can be used to test single- calculation. The TRT4X also compares the test
phase and three-phase transformers, both with result with the nameplate ratio and prints out the
and without taps in accordance with the % of error for each test.
requirements of the IEC 60076-1 standard.
Operating conditions messages or error
For a three-phase measurement, the test set is messages identify incorrect test conditions,
connected to all the three phases of a abnormal operating condition or transformer
transformer to be tested. If specific vector problems. TRT4x has a very high ability to
diagrams are selected for different types of cancel electrostatic and electromagnetic
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transformers, the TRT4x will run a specific test interference in HV electric fields. It is achieved
for each transformer type (i.e., single phase, by a very efficient filtration. The filtration is made
Delta to wye/star, Wye/Star to delta, Delta to utilizing the proprietary hardware and software
delta, Wye/Star to wye/star, Delta to zig-zag, design solutions.
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Application
The list of instrument application includes:
Turns ratio measurement
Turns ratio deviation calculation
Excitation current measurement
Phase angle measurement
Automatic vector group detection
Verification of demagnetization process
Magnetic balance test
Connecting TRT4x to Test Object
Three-Phase Transformer
TRT4x is programmed to automatically test turns
ratio, phase shift, and excitation current of power
and distribution transformer types defined by
CEI/IEC standards. Using two sets of four
cables, all bushings of the primary and the
secondary sides are connected only once.
Connecting TRT4x to a three-phase autotransformer
Single-Phase Transformer
Although a three-phase device, TRT4x is able to
test single-phase transformers. Either a special
cable set or a three-phase cable set can be
used for this purpose.
Connecting TRT4x to a three-phase transformer
Three-Phase Autotransformer
TRT4x is also programmed to automatically test
turns ratio, phase shift, and excitation current of
autotransformer types defined by CEI/IEC
standards. Using two sets of four cables, all
bushings of the primary and the secondary sides
are connected only once.
Connecting TRT4x to a single-phase transformer
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Single-Phase Autotransformer Current Transformer
Although a three-phase device, TRT4x is able to TRT4x can also be used for verifying turns ratio
test single-phase autotransformers. Either a and polarity of current transformers (CTs). CTs
special cable set or a three-phase cable set can are specially constructed transformers – they
be used for this purpose. are instrument transformers with only one, or
occasionally two primary turns. Larger number
of turns is on the “X” (secondary) side of CTs.
For that reason, when verifying CTs, the “X” test
cables must be connected to the primary of a
CT. If there are no primary terminals, the “X”
cables should be slid through the CT core and
short-circuited.
Connecting TRT4x to a single-phase autotransformer
Phase-Shifting Transformer
The presence of true three-phase test voltage
allows TRT4x to test any type of transformer,
even those with irregular vector groups,
including phase-shifting transformers.
Connecting TRT4x to an unmounted current transformer
Capacitive Voltage Transformer
When measuring turns ratio of capacitive
voltage transformers (CVTs), test voltage of
several kilovolts is required, much higher than
available in common turns ratio testers.
Connecting TRT4x to a phase-shifting transformer Together with Extension Transformer CVT40,
TRT4x can output up to 5 kV AC, which is
suitable for measuring turns ratio of CVTs.
Polarity can be checked at the same time.
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Connecting TRT4x to a capacitive voltage transformer via CVT40
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Benefits and Features
Test Voltage up to 5 kV AC angle, winding resistance, on-load tap changer
TRT4x has specially designed option for testing DVtest, and demagnetization, thus making TRT4x
turns ratio of capacitive voltage transformers and TWA one measurement system.
(CVTs). Because of their design, these
transformers require several kilovolts over Automatic Vector Group Detection
capacitive part in order to excite inductive part and TRT4x is able to automatically detect vector group
obtain correct turns ratio. Together with Extension of three-phase transformers and auto-
Transformer CVT40, TRT4x can output up to 5 kV transformers. This is possible both with and
AC. without PC software.
True Three-Phase Test Voltage DV-Win Software
TRT4x is a true three-phase turns ratio tester. The DV-Win software is included in the purchase
Unlike other so-called “three-phase” testers that price, and all its updates are free of charge. The
allow only connecting to three transformer phases software allows full control of TRT4x functions from
at once, TRT4x also has the ability to output true a PC, creating and storing test plans, and
three-phase test voltage, without any additional downloading test results from the instrument’s
devices or modules. This allows testing any internal memory. All results are presented both
transformer type, including special designs such as numerically and graphically, for an easy and
phase shifting, arc furnace, rectifier transformers, convenient analysis. Test results can be directly
etc. Besides measuring a turns ratio, it can also exported to excel document. Customized test
measure a voltage ratio of three-phase report can be generated, edited, saved in several
transformers, simulating real transformer working file formats including pdf, and printed.
condition. By applying true three-phase test
voltage, and by measuring induced three-phase Magnetic Balance Test
voltage, TRT4x is able to determine actual phase This test helps in detecting possible problems in
shifts between HV and LV side voltages, and not the transformer magnetic core. The test is
just 0 or 180 degrees shift that is obtained by completely automatic and requires no changes in
testing transformers with single-phase test voltage cable setup comparing to turns ratio test. Results
in turns. are presented both numerically and graphically.
Accuracy Memory
The highest accuracy in the market, for all three There is enough memory in the TRT4x to store
parameters measured – turns ratio, excitation 200 test records. Each record consists of 50 test
current, and phase angle – makes potential readings.
transformer irregularities and faults more visible.
USB Flash Drive
Resolution
Results can also be exported to a USB memory
Excitation current measurement is important for through integrated USB flash drive.
determining problems in the transformer magnetic
core. High measurement resolution enables better Tap Changer Control Unit
tracking of the current trend through all tap
TRT4x has a built-in tap changer control unit,
positions.
which allows remote on-load tap changer ope-
ration. A single operator can perform complete
Interchangeable cables with TWA
testing very quickly.
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TRT4x uses the same cable set as Three-phase
Winding Ohmmeter & Tap Changer Analyzer TWA. Built-in Printer
This enables one-time cable setup for performing
Built-in thermal printer, 112 mm (4.4 in) wide, is an
six tests: turns ratio, excitation current, phase
optional accessory.
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Technical Data
Mains Power Supply Display
Connection: according to IEC/EN60320-1; LCD screen 20 characters by 4 lines;
UL498, CSA 22.2
LCD display with backlight, visible in bright
Mains supply: 90 – 264 V AC, 50/60 Hz sunlight
or 110 – 350 V DC
Input power: 250 VA Interface
Fuse: 2 A / 250 V, type F, not user replaceable USB (standard)
RS232 (optional)
Output Data
Instrument / Test voltages Data Storage
8, 40, 125 V AC TRT4x can store up to 10 000 test results
TRT40A
3 x (8, 40, 125)3 V AC
Environmental Conditions
1, 8, 40, 125 V AC
TRT43A Operating temperature:
3 x (1, 8, 40, 125)3 V AC
-10 ºC – +55 ºC / 14 ºF – +131 ºF
Measurement Storage & transportation:
-40 ºC – +70ºC / -40 ºF – +158 ºF
Turns ratio measuring range: 0,8 – 15 000
Humidity: 5% – 95% relative humidity, non
Turns ratio resolution: 5 digits condensing
Typical turns ratio accuracy:
Dimensions and Weight
@125 V AC @40 V AC
Dimensions (W x H x D):
0,8 – 999: ±0,05% 0,8 – 999: ±0,05% 480 x 190 x 385 mm / 18.9 x 7.48 x 15.16 in
1 000 – 3 999: ±0,05% 1 000 – 3 999: ±0,1% Weight: 9 kg / 19.8 lbs
4 000 – 15 000: ±0,1% 4 000 – 15 000: ±0,2%
Warranty
@8 V AC @1 V AC
3 years
0,8 – 999: ±0,05% 0,8 – 999: ±0,05%
1 000 – 3 999: ±0,1% 1 000 – 3 999: ±0,1% Printer (optional)
4 000 – 15 000: ±0,2% Built-in thermal printer
Excitation current range: 0 – 2 A Paper width 112 mm / 4.4 in
Excitation current resolution: Printer operating temperature:
0,0000 – 9,9999 mA 0,1 μA 0 ºC – +50 ºC / 32 ºF – +122 ºF
10,000 – 99,999 mA 1 μA
100,00 – 999,99 mA 10 μA Printer density is guaranteed in this range:
1,0000 – 2,0000 A 100 μA 5 ºC – +40 ºC / 41 ºF – +104 ºF
20 – 85% relative humidity, non condensing
Typical excitation current accuracy:
±(0,25% rdg + 500 μA)
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Phase angle range: 0 – 360º
Phase angle resolution: 0,01º
Typical phase angle accuracy: ±0,05º
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Applicable Standards
Installation/Overvoltage category: II
Pollution degree: 2
Safety: LVD 2014/35/EU (CE Conform)
Standard EN 61010-1:2001
EMC: Directive 2014/30/EU (CE Conform)
Standard EN 61326-1:2006
CVT40 Technical Data
Input Data Dimensions and Weight
Power supply: Only from associated TRT4x Dimensions (W x H x D):
device, via provided connection cables 223 x 260 x 284 mm
8.78 x 10.24 x 11.18 in
Maximum input voltage: 125 V AC
Weight:10 kg / 22 lbs
Frequency: 50/60 Hz
Applicable Standards
Output Data
Installation/Overvoltage category: II
Maximum output voltage 5 kV AC
Pollution degree: 2
Measurement Safety: LVD 2014/35/EU (CE Conform)
Turns ratio range 40:1 Standard EN 61010-1:2001
Turns ratio accuracy ±0,5% of ratio EMC: Directive 2014/30/EU (CE Conform)
Standard EN 61326-1:2006
Maximum excitation capacity: 0,02 μF
Environmental Conditions
Operating temperature:
-10 ºC – +55 ºC / 14 ºF – +131 ºF
Storage & transportation:
-40 ºC – +70ºC / -40 ºF – +158 ºF
Humidity: 5 % – 95 % relative humidity, non
condensing
All specifications herein are valid at ambient temperature of + 25 °C and recommended accessories.
Specifications are subject to change without notice.
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Cable plastic case –
H winding test cable set X winding test cable set Transport case
large size
Extension Transformer H test cable set for TRTC Verification
High voltage cable set
CVT40 connecting to TRT4x Calibrator
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Order Info
Instrument Article No
True Three-phase Transformer Turns Ratio Tester TRT40A TRT40AX-N-00
True Three-phase Transformer Turns Ratio Tester TRT43A TRT43AX-N-00
Included accessories
Windows-based DV-Win PC software including USB cable
Tap changer control cable 5 m (16.4 ft)
Mains power cable
Ground (PE) cable
Recommended accessories Article No
H winding test lead set, 4 x 10 m (32.8 ft) with TTA clamps HC-10-4LMCWC
X winding test lead set, 4 x 10 m (32.8 ft) with TTA clamps XC-10-4LFCWC
Cable plastic case – large size CABLE-CAS-03
Transport case HARD-CASE-LC
Optional accessories Article No
H winding test lead set, 4 x 5 m (16.4 ft) with TTA clamps HC-05-4LMCWC
X winding test lead set, 4 x 5 m (16.4 ft) with TTA clamps XC-05-4LFCWC
H winding test lead set, 4 x 15 m (49.2 ft) with TTA clamps HC-15-4LMCWC
X winding test lead set, 4 x 15 m (49.2 ft) with TTA clamps XC-15-4LFCWC
H winding test lead set, 4 x 20 m (65.6 ft) with TTA clamps HC-20-4LMCWC
X winding test lead set, 4 x 20 m (65.6 ft) with TTA clamps XC-20-4LFCWC
H winding cable extension set, 4 x 5 m (16.4 ft) HE-05-4LMCFC
X winding cable extension set, 4 x 5 m (16.4 ft) XE-05-4LFCMC
H winding cable extension set, 4 x 10 m (32.8 ft) HE-10-4LMCFC
X winding cable extension set, 4 x 10 m (32.8 ft) XE-10-4LFCMC
H winding cable extension set, 4 x 15 m (49.2 ft) HE-15-4LMCFC
X winding cable extension set, 4 x 15 m (49.2 ft) XE-15-4LFCMC
H winding test lead set, 4 x 5 m (16.4 ft) with TTA clamps (for TRT only) HC-05-4TRTMW
X winding test lead set, 4 x 5 m (16.4 ft) with TTA clamps (for TRT only) XC-05-4TRTFW
H winding test lead set, 4 x 10 m (49.2 ft) with TTA clamps (for TRT only) HC-10-4TRTMW
X winding test lead set, 4 x 10 m (49.2 ft) with TTA clamps (for TRT only) XC-10-4TRTFW
H winding test lead set, 4 x 15 m (65.6 ft) with TTA clamps (for TRT only) HC-15-4TRTMW
X winding test lead set, 4 x 15 m (65.6 ft) with TTA clamps (for TRT only) XC-15-4TRTFW
H winding cable extension set, 4 x 5 m (16.4 ft) (for TRT only) HE-05-4TRTMF
X winding cable extension set, 4 x 5 m (16.4 ft) (for TRT only) XE-05-4TRTFM
H winding cable extension set, 4 x 10 m (32.8 ft) (for TRT only) HE-10-4TRTMF
X winding cable extension set, 4 x 10 m (32.8 ft) (for TRT only) XE-10-4TRTFM
H winding cable extension set, 4 x 15 m (49.2 ft) (for TRT only) HE-15-4TRTMF
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X winding cable extension set, 4 x 15 m (49.2 ft) (for TRT only) XE-15-4TRTFM
Cable plastic case – small size CABLE-CAS-01
Cable plastic case – medium size CABLE-CAS-02
Cable plastic case with wheels – medium size CABLE-CAS-W2
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Cable plastic case with wheels – large size CABLE-CAS-W3
Plastic transport case HARD-CASE-PC
Plastic transport case with wheels HARD-CASE-PW
Built-in thermal printer 112 mm (4.4 in) PRINT-112-00
Thermal paper roll 112 mm (4.4 in) PRINT-112-RO
Bluetooth communication module BLUET-MOD-00
Inverter 12 V DC to 230 V AC, 50 Hz IN650-12-230
Verification Calibrator TRTC TRTC-05-4800
H winding test lead set, 4 x 1 m (3.28 ft) with banana plugs HC-01-4LMCBP
X winding test lead set, 4 x 1 m (3.28 ft) with banana plugs XC-01-4LFCBP
Extension Transformer CVT40 CVT40XX-N-00
High voltage cable set 2 x 10 m (32.8 ft) CET-10-03EWC
H test cable set for connecting to TRT4x, 2 x 5 m (16.4 ft) HET-05-2MCFC
Cable bag CABLE-BAG-00
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IBEKO Power AB Contact
Stockholmsvägen 18 Phone: +46 70 0925 000
181 50 Lidingö, Sweden E-mail: sales@dv-power.com
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