Category: Transformer Test Equipment

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Transformer Test Equipment

Transformer test equipment has evolved over the years & includes many devices that do various measurements. From winding resistance and turns ratio testers, to Tan Delta & impulse testers.

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15kV Insulation Resistance Meter | MIC15k1
R128,722.00 ex vat

15kV Insulation Resistance Meter - Overview

The MIC-15k1 meter is designed to measure the insulation resistance of power objects up to 15kV, i.e. single and multicore cables, transformers, motors and generators, capacitors, switches, and other devices installed in power stations. It is especially recommended for measurements in areas with very high electromagnetic disturbances, e.g. electrical substations with 1200 kV AC and 500 kV DC. Thanks to the 15 kV measuring voltage (in accordance with ANSI / NETA ATS-2009 TABLES 100.1) the meter can be used for measuring objects with a nominal voltage above 34.5 kV.

15kV Insulation Resistance Meter - Features
- Diagnostics of insulation systems based on standard measurements of IR, DAR, PI, SV, RT, and DD, widened with the partial discharge (PD) indicator for each of these measurements
- Testing the electrical durability of tested object - breakdown voltage indication
- High resistance to electromagnetic interferences - uninterrupted work in power stations & close to high voltage transmission lines up to 1200 kV AC & 500 kV DC
- Smooth voltage rise in time function (RT - Ramp Test) - state the partial discharges in the facility and carry out a partial location of their occurrence
- Efficient converter with a power of ~150 W enables insulation burnout, allowing for pinpointing the location of cables and wires short circuit using one of the following:
  - visual method (if power cables are visible along the entire length)
  - reflectometric methods, seismic-acoustic waves detector, or with A-frame to indicate the direction of the fault (the conductor must be buried in the ground with earth direct contact)
- Compatible with external software
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2
Mega Ohm Meter | MIC-10
R10,492.00 ex vat

Mega Ohm Meter - Overview

The MIC-10 meter is designed to perform electrical tests, which establish the safety of insulation in systems. This is a very handy digital multimeter tool, measuring insulation resistance up to 10GOhms with up to 1000V measuring in accordance with IEC61557-2.

Mega Ohm Meter - Features
- Continuous indication of insulation resistance or leakage current
- Select test voltages of: 50, 100, 250, 500, 1000 V
- Automatic discharge of capacitance of tested object after the insulation resistance measurement
- Acoustic signalling of five-second periods to facilitate obtaining time characteristics
- Indication of actual test voltage during the measurement
- Protection against measuring live objects
- Three-lead measurement
- Continuity measurement of protective and equipotential conductors according to EN 61557 - 4 with >200 mA current
- Low-voltage circuit continuity and resistance measurement
- Circuit resistance measurement (<1999 ) with the <15 mA current
- Sound signal if circuit resistance is below 30Ω
- Capacitance measurement during the R_ISO measurement
- Measurement of alternating and direct voltages in the 0...600 V range
- Power supply: 4 AA disposable or rechargeable batteries, monitoring of power supply voltage
- Meter conforms to EN 61557
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2
10kV Insulation Resistance meter up to 40 Tera-Ohm | MIC10k1
R92,321.00 ex vat

10kV Insulation Resistance meter - Overview

This insulation resistance meter has a digital filter function for measurements in a high-noise environment. Continuity measurement of protective connections and equipotential bonding in accordance with EN 61557-4 with current > 200 mA. Adjustable limits for measured resistance R_ISO and R_CONT. Measurement of leakage current during insulation resistance testing. DC and AC voltage measurement in the range of 0...750 V. Drawing graphs on the display during measurement. Innovative memory with the option to describe measurement points, facilities, and names of customers. Can be operated with a mini Bluetooth keyboard (optional). Stable measurements in noisy environments such as 765 kV substations. Graphic LCD 5,6'’ backlit display. Keyboard backlit. Power supply from battery packs. Built-in fast charger. The instruments meet the requirements of the EN 61557 standard.

10kV Insulation Resistance meter - Features
- clear visible display
- measurement voltage in the range of: 50…10000 V (50...1000 V at 10 V and 1...10 kV at 25 V)
- continuous indication of measured insulation resistance or leakage current
- automatic discharge of measured object capacitance voltage after the end of insulation resistance measurement
- acoustic signalling of 5 seconds intervals to facilitate capturing time characteristics
- adjustable measuring time to 99'59'’
- metered T₁, T₂ and T₃ test times for measuring one or two absorption coefficients from the range of 1…600 s
- polarization index (PI), absorption coefficients Ab1, Ab2 and dielectric absorption ratio (DAR) measurement
- indication of actual test voltage during measurement
- 1.2 mA, 3 mA and 5 mA test current
- insulation resistance measurement using two- or three-wire method
- measurements with test leads up to 20 m
- protection against measuring live objects
- automatic measurement of multiple core cables with the additional AutoISO-5000 adapter (for MIC-10k1 max. voltage 5 kV)
- measurement of capacitance during the measurement of R_ISO
- measurement of temperature (with additional probe - WASONT1)
- step voltage insulation resistance measurement (SV)
- Dielectric Discharge calculation (DD)
- location of damage (burnout)
https://www.youtube.com/watch?v=ibX7f55ngzc

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Insulation Resistance Meter 5kV | MIC-5050
R58,702.00 ex vat

Insulation Resistance Meter 5kV - Overview

This insulation resistance meter has a digital filter function for measurements in high-noise environments. Continuity measurement of protective connections and equipotential bonding in accordance with EN 61557-4 with current > 200 mA. Adjustable limits for measured resistance R_ISO and R_CONT. Measurement of leakage current during insulation resistance testing. DC and AC voltage measurement in the range of 0...750 V. Graphs on the display during measurement. Innovative memory with the option to describe: measurement points, facilities, and names of customers. Bluetooth keyboard (optional). Graphic backlit LCD 5,6'’. Keyboard backlit. Power supply from a main power line or battery packs. Built-in fast charger. The instruments meet the requirements of the EN 61557 standard.

Insulation Resistance Meter 5kV -Features
- measurement voltage any in the range of 50...5000 V (50...1000 V at 10 V and 1...5 kV at 25 V)
- continuous indication of measured insulation resistance or leakage current
- automatic discharge of measured object capacitance voltage after the end of insulation resistance measurement
- acoustic signalling of 5 seconds intervals to facilitate capturing time characteristics
- adjustable measuring time to 99'59'’
- metered T₁, T₂ and T₃ test times for measuring one or two absorption coefficients from the range of 1…600 s
- polarization index (PI), absorption coefficients Ab1, Ab2 and dielectric absorption ratio (DAR) measurement
- indication of actual test voltage during measurement
- 1.2 mA, 3 mA and 5 mA test current
- insulation resistance measurement using two- or three-wire method
- measurements with test leads up to 20 m
- protection against measuring live objects
- automatic measurement of multiple core cables with the additional AutoISO-5000 adapter
- measurement of capacitance during the measurement of R_ISO
- measurement of temperature (with additional probe - WASONT1)
- step voltage insulation resistance measurement (SV)
- Dielectric Discharge calculation (DD)
- location of damage (burnout)
https://www.youtube.com/watch?v=DyOH7K4Yoqg

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Cropico DO7 Micro-Ohmmeter
R73,021.00 ex vat
DO7 Micro-Ohmmeter - Overview

The DO7 digital micro ohmmeter is a practical instrument for low resistance measurement, ideal for utility use in the workshop, field or test facilities. It is of rugged construction, contained in a sealed ABS plastic case with lid and carrying handle. The DO7 digital micro ohmmeter has many advanced features. Rechargeable batteries mean real portability with more than 1 hour of continuous operation on the lowest ranges(10A), and 20 hours on all others. The internal charger will boost the charge to 90% of full charge, switching automatically to a trickle maintenance charge. Warning LEDs illuminate when an open circuit lead condition is detected.

DO7 Micro-Ohmmeter - Features
- True 4 terminal measurement eliminates lead resistance errors
- 10A measuring current
- Rechargeable batteries with built-in charger
- Measuring ranges 600µΩ to 60Ω
- Resolution 0.1µΩ on 600µΩ range
- 0.8” LED display daylight viewable
- Auto average of forward and reverse measurement
- Remote start socket
- All solid state design
- Wide range of leads and accessories available
- RS232 printer output
- Protection up to 415Vrms at the measuring terminals,
- Digital calibration and long scale length
- 6,000 count
https://www.youtube.com/watch?v=12vpdn6h-XM

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MIC-2501 Insulation Resistance Tester/Meter
R18,539.00 ex vat
MIC-2501 Insulation Resistance Tester/Meter - Overview

A very handy tool for measuring Insulation resistance with up to 2500V. It can measure up to 1TOhms in accordance with IEC61557-2. Comes with a convenient carry case which has straps to free up your hands during operations.

MIC-2501 Insulation Resistance Tester/Meter - Features
- Selectable voltage in the 100…2500 V range with 100 V step
- Continuous indication of insulation resistance or leakage current
- Automatic discharge of capacitance of tested object after the insulation resistance measurement
- Acoustic signalling of five-second periods to facilitate obtaining time characteristics
- Measured test times T₁, T₂ i T₃ to measure one or two absorption coefficients in 15, 60 and 600 s
- Indication of actual test voltage during the measurement
- Protection against measuring live objects
- Two and three-lead measurement methods
- Continuity measurement of protective and equipotential conductors according to EN 61557-4
- Leakage current measurement
- Alternating and direct voltages in the 0...750 V range
- Built-in rechargeable battery pack
- The instruments meet the requirements of the EN 61557 standard
- Charge from car lighter (12 V) socket (additional accessories)
https://www.youtube.com/watch?v=ZKKcoVvN-B8

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Standard Three Phase Winding Resistance Meters | TWA

Standard Three-Phase Winding Resistance Meters - Overview

This TWA is designed for six-winding resistance measurement and simultaneous three-phase on-load tap changer analysis of both the primary and the secondary transformer windings. It has one singlestep cable setup, with test currents of up to 40A. Each transformer configuration has a special measurement algorithm which is optimised for the fast stabilisation of test results. It generates a true DC ripple-free current. Both the injection of the current and the discharge of energy from the magnetic circuit are automatically regulated. It can cancel electrostatic and electromagnetic interference that exists in HV electric fields. It is achieved by a proprietary solution applied to both the hardware construction and the application software implementation.

Standard Three-Phase Winding Resistance Meters - Features
- Resistance measurement of all tap positions in all six windings
- True three-phase on-load tap changer (OLTC) DVtest
- Quick measurement, single-step cable setup
- Rapid automatic demagnetisation
- Fully automated test mode
- Large 10.1’’ or 7’’ graphical touchscreen display
- Temperature measurement channel
- OLTC vibration measurement channel
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Turns Ratio and Winding Resistance Analyser | TWR-250B

Turns Ratio and Winding Resistance Analyser - Overview

This analyser is battery-operated and is designed for measuring transformer winding resistance and turns ratio. It is capable of testing six transformer windings with a single cable connection, as well as three-phase automatic transformer demagnetisation. It has the option of automated test mode, where the instrument operates the tap changer without operator input (minimising the risk of human error) and records winding resistance and turns ratio results based on pre-selected criteria. This also measures excitation current and phase shift. This enables detecting transformer core or winding turns failures which cannot be spotted by measuring turns ratio only. It has a built-in true three-phase power source so it can test transformers with special configurations, such as phase-shifting, rectifiers, arc-furnace, traction transformers. The instrument can output test current up to 25 A DC for winding resistance tests and voltage up to 250 V AC for turns ratio tests, but it can also output a very low-test voltage of 1 V AC, which is necessary for turns ratio verification of the majority of current transformers. It has a large 10.1” graphical touch-screen display with test templates and automatic test mode. Users can create test templates, store and load them with just a few clicks.

Turns Ratio and Winding Resistance Analyser - Features
- Winding resistance measurement
- Demagnetisation
- Turns ratio measurement
- Turns ratio deviation calculation
- Excitation current measurement
- Phase angle measurement
- Automatic vector group detection
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SFRA Sweep Frequency Response Analyzer | SFRA45

SFRA Sweep Frequency Response Analyzer - Overview

This Sweep Frequency Response Analyzer with a bandwidth of 5Hz to 45MHz offers a fully portable solution which fully complies with IEC60076-18 – Power Transformers Part 18 – Measurement of frequency response. Featuring a built-in colour LCD screen and is battery powered. The tablet style instrument has the ability to perform most the common sweep frequency response analysis technique “Fingerprint Comparison” as well as all other comparison techniques, with or without PC Software. The dedicated software available (SFRAComm) also enables the user to create databases from which historical transformer sweeps can be recalled and compared to current sweeps for analysis.

There are Four occasions when SFRA is performed
1. Upon factory quality checking
2. Before a short circuit test
3. Before and After transportation
4. Ongoing scheduled maintenance
SFRA Sweep Frequency Response Analyzer - Features
- Full Colour LCD VGA Display view comparison on the spot
- Frequency range 5Hz to 45MHz
- Gain Accuracy 0.02dB
- Phase Accuracy 0.05°
- RS232, LAN and USB
- PC Software package included
- 2Hr Battery Life
- Leading Phase Accuracy
- Truly Portable Measurements
- LCR Mode
- Save Data to external USB
- 50Ohm or High Impedance Input
- Scope Function
- Save Data to Database for comparison
- Supplied with all accessories and carry case
Datasheet

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Winding Single Phase Resistance Meters | RMO-TT

Winding Single Phase Resistance Meters - Overview

The RMO-TT series is designed for winding resistance measurement of inductive objects. It uses advanced switch-mode technology. It is an accurate (0,1% rdg + 0,1% F.S.), and powerful portable instrument (up to 100 A). It generates a true DC ripple-free current with automatically regulated measurement and discharging circuit. It can perform simple, quick and reliable transformer on-load tap changer condition assessments. This series enables measurements of a winding resistance in every tap position, current ripple values and transition times during the tap changes. Problems with the connection, contacts, and selector/diverter switch operation can be detected with these measurements. It is equipped with thermal and overcurrent protection. It has the ability to cancel electrostatic and electromagnetic interference that exists in HV electric fields. This is achieved by a proprietary filtration solution applied to both the hardware construction and the application software implementation. Applications include: winding resistance measurement of inductive test objects; dynamic resistance measurement (DVtest) of on-load tap changers; measurement of on-load tap changer motor current by using a dedicated channel; heat run test, which enables obtaining the Hot Spot temperature along with resistance graph during the cooling process 1; and single-phase automatic transformer demagnetisation.

Winding Single Phase Resistance Meters - Features
- On-load tap changer dynamic resistance measurement
- Three resistance measurement channels
- Four temperature measurement channels
- Vibration measurement channel
- Tap changer motor current monitoring channel
- Automatic measurement for the Heat Run test
- Rapid automatic demagnetisation
- Automatic discharge circuit
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Turns Ratio Tester | TRT Advanced Series

Turns Ratio Tester - Overview

TRT advanced series are true three-phase, fully automatic test devices specially designed for turns ratio, phase shift, and excitation current measurements of power, distribution, and instrument transformers. It determines the transformer turns ratio by applying voltages across high-voltage windings, accurately measuring voltages across the unloaded transformer windings, and then displaying the ratio of these voltages. The test set can be used to test single-phase and three-phase transformers, both with and without taps in accordance with the requirements of the IEC 60076-1 standard. It has a very high ability to cancel electrostatic and electromagnetic interference in HV electric fields.

Turns Ratio Tester - Features
- Automatic vector group detection
- Built-in tap changer control unit
- Interchangeable test leads with Three-phase Winding Ohmmeters & Tap Changer Analysers TWA Series
- Single-phase test voltages up to 500 V AC
- True three-phase test voltages up to 3x290√3V AC
- Up to 5 kV AC with additional CVT20 for testing capacitive voltage transformers
- The best turns ratio accuracy of 0.03% • Large 10.1” or 7” graphical touch screen display
https://www.youtube.com/watch?v=V8ktNqs6SPE

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Winding Resistance Meters Single Phase with DRM | RMO-TD Series

Winding Resistance Meters Single Phase with DRM - Overview

The RMO-TD series is designed for winding resistance measurement of inductive objects. It is based on the most advanced switch-mode technology available today. It is accurate (0,1% rdg + 0,1% F.S.), and powerful (up to 60 A). It generates a true DC ripple-free current with automatically regulated measurement and discharging circuit. It can perform simple, quick and reliable transformer on-load tap changer condition assessments. This series enables measurements of a winding resistance in every tap position, current ripple values and transition times during the tap changes. Problems with the connection, contacts, and selector/diverter switch operation can be detected with these measurements. It is equipped with thermal and overcurrent protection. It has a high ability to cancel electrostatic and electromagnetic interference that exists in HV electric fields. This is achieved by a proprietary filtration solution applied to both the hardware construction and the application software implementation.

Winding Resistance Meters Single Phase with DRM - Features
- On-load tap changer (OLTC) dynamic resistance measurement DVtest
- Three measurement channels
- One temperature measurement channel
- Tap changer motor current monitoring channel
- Built-in tap changer control unit
- Automatic resistance measurement for the Heat Run test
- Rapid automatic demagnetisation
- Automatic discharge circuit
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Handheld Winding Ohm Meter | RMO-TH Series

Handheld Winding Ohm Meter - Overview

The handheld winding ohm meter device is a DV Power single-phase instrument specially designed for measuring transformer winding resistance and performing transformer demagnetisation. Winding resistance is determined by injecting DC current through a winding, accurately measuring DC voltage across the winding, and then calculating resistance as the ratio of voltage and current. The device generates true DC ripple-free currents. Both the injection of the current and the discharge of energy from the transformer magnetic circuit are automatically regulated. The instrument has two output DC sources for measuring transformer winding resistance. The first DC source can output a maximum of 2 A DC and is designed for injecting current into the transformer’s high-voltage winding. The second DC source can output a maximum of 10 A DC and is designed for testing the transformer’s low-voltage winding. Having two separate DC sources is especially useful when measuring the winding resistance of distribution transformers. These transformers have a large turns ratio. Because of that, the difference between resistances of high voltage and low voltage windings is very big. This requires different levels of test currents for high-voltage and low-voltage windings. Applications include: winding resistance measurement of distribution and instrument transformers, motors, and generators, and demagnetisation of distribution and instrument transformers, motors, and generators.

Handheld Winding Ohm Meter - Features
- Two Output DC Sources
- Memory
- DV-TR Software
- Internal Li-Ion battery
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Three-Phase Transformer Turns Ratio Tester | TRT Std Series

Three-Phase Transformer Turns Ratio Tester - Overview

The TRT Standard series offers advanced instrumentation which includes LCD displays. Each model measures transformer excitation current and phase shift and performs automatic vector group detection and magnetic balance on three-phase transformers and three-phase autotransformers. They have built-in true three-phase power sources which equip test transformers with special configurations, such as phase-shifting, rectifiers, arc-furnace, traction transformers, etc. The instruments can output test voltages from 1 V AC to 250 V AC, depending on the chosen model. A high test voltage of 250 V AC provides more accurate turns ratio testing compared to other turns ratio testers on the market, with an extremely low test voltage of 1 V AC enables turns ratio verification of current transformers. Applications include: turns ratio measurement, turns ratio deviation calculation, excitation current measurement, phase angle measurement, automatic vector group detection, verification of demagnetisation process and magnetic balance testing.

TRT03 Models (TRT03A, TRT03B, TRT03C) – single-phase voltage up to 100 V
TRT33 Models (TRT33A, TRT33B, TRT33C) – single and true three-phase voltage up to 100 V
TRT63 Models (TRT63A, TRT63B, TRT63C) – single and true three-phase voltage up to 250 V

Three-Phase Transformer Turns Ratio Tester - Features
- True Three-Phase Test Voltage TRT (except TRT03)
- Highest accuracy for turns ratio, excitation current, and phase angle
- High measurement resolution
- Interchangeable cables with TWA
- Automatic Vector Group Detection
- Built-in Tap Changer Control Unit
- DV-TR software is included
- Magnetic Balance Test
- Memory store 200 test records. Each consists of 50 test readings
- USB Flash Drive
- Optional Built-in Printer
https://www.youtube.com/watch?v=aUJ0BNudhI4&t=17s

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Single Phase Winding Resistance Meters | RMO-TW Series

Single Phase Winding Resistance Meters - Overview

This series is ideal for measuring the winding resistance of inductive objects. It is perfect for testing transformer windings (power transformers, distribution, autotransformers) and for on-load tap-changer verification. In addition, it can also perform transformer demagnetisation. The series contains 4 models, with maximal test currents from 10 A (RMO10TW) to 50 A (RMO50TW). They are fitted in a portable and lightweight metal housing. Rack-mount available on request. It generates a true DC ripple-free current with an automatically regulated measurement and discharging circuit. The injection of current and discharge of energy from the test object is automatically regulated. Three independent channels enable the testing of three windings in series. Consequently, this enables measurements of winding resistance in every tap position of an on-load tap changer without discharging between the tests. The software enables control and observation of the test process, as well as saving and analysing the results on a PC. It provides a test report, arranged in Excel spreadsheet, PDF, Word, or ASCII format. Additionally, DV-Win measures and calculates the OLTC transition time, the ripple, and the winding resistance for each tap-changing operation.

Single Phase Winding Resistance Meters - Features
- Test Voltage up to 55 V DC
- Simultaneous Three-Channel Winding Resistance Measurement
- On Load Tap Changer Verification
- Transformer Demagnetisation
- DV-TR Software
- Heat Run Test Application
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