Transformer Test
Measure turns ratio, no-load current and winding resistance of transformers.
See Also: Transformers, Transformer Testers, Current Transformer Test, Current Transformer Test Set
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Current Transformers
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The Institute of Electrical and Electronic Engineers defines a current transformer (IEEE Std C57.13) as “a transformer intended to reproduce in its secondary circuit, in a definite and known proportion, the current of its primary circuit with the phase relations substantially preserved”. Its primary winding is connected in series with the conductor carrying the current to be measured or to be controlled and its secondary winding is connected to the measuring, protection or control devices. Osborne designs and manufactures current transformers which are used for instrumentation applications, others which are used for power system synchronizing applications and others which are used in protection circuit application. They have been designed to meet specified current ratios, burden impedance and transformation errors.
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OIP TYPE VOLTAGE TRANSFORMER
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12kV - 145kV post type voltage transformers having Oil Impregnated Paper( OIP) as major insulation has been designed with several unique features.OIP insulated outdoor products are subjected to extreme climatic conditions and hence extra care is taken in the design and manufacturing of such transformers.
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ESS Performance Test System
Test System
The Energy Storage System (ESS) Performance Test System is used to evaluate, test, and certify the performance of energy storage systems up to 2MW. The system is a configurable platform with over 200 channels of simultaneously measured AC and DC voltages and currents, environmental temperatures, airflow, and communications. Intuitive software provides real-time monitoring and analysis of power, energy and efficiency to adhere with industry standards. The test system interfaces hardware such as load banks, and controls the ESS to simulate utility applications such as peak shaving and frequency regulation.
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80 DIOs, 8AIs, 8AOs JTAG Boundary Scan Resources Unit Expansion
YAV9JTAH
Test Fixture
80 DIOs8 Ais8 AOsCompatible with all JTAG vendors
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VOLTAGE TRANSFORMERS
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Designing & manufacturing a range of high quality, voltage transformers in three different frame sizes for both measuring and protection duties. Transformers which are designed to comply with the requirements of IEC 61869-3 or other international standards as required can be supplied to satisfy most Low Voltage applications.
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Instrument Transformers Testers
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Calmet Smart Calibration Devices
Calmet offers a variety of Instrument Transformers Testers including the TE30 and the Calport 100.
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Mini Automatic Transformer Observation System
mini-ATOS
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The mini-ATOS, is a professional multifunctional power transformer and substation diagnostic system. This compact and intelligent instrument can perform many routine and advanced tests such as Winding Resistance (WR), Dynamic Resistance Measurement (DRM), Turns Ratio (TR), Frequency Response of Stray Losses (FRSL), Magnetic Balance, and other diagnostic parameters. With the built-in fully automatic multiplexer, only a one-time connection is required for nearly all functions, which saves a considerable amount of time. The portable, rugged case is perfect for use anywhere onsite or in a laboratory. It is specially designed for fast and easy measurements with the well-known high precision and quality of all Raytech instruments.
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Flexible Cable, 2.4 Mm To 3.5 Mm
85134H
Test Port Cable
The Keysight 85134H is a 62.9 cm (24.75 in) long1 flexible cable with a 2.4 mm female2 to 3.5 mm male connector. Cable frequency range is dc to 26.5 GHz with a return loss greater than or equal to 16 dB. Insertion loss is 0.31 * sqrt (f) + 0.2 (where f is frequency is GHz) for the test port connector and 1.8 dB at maximum frequency for the device connector. Phase stability of semi-rigid/flexible cables is characterized with a 90 degree bend using a 2.5 inch radius. Stability1 of the Keysight 85134H is less than 0.12 dB and phase is less than 0.13o * f + 0.5o, (where f is frequency in GHz).
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FTIR – Fourier Transform Infrared
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FTIR stands for Fourier Transform Infrared spectroscopy. It is a powerful gas measurement technology for simultaneous measurements of multiple gases. The ability to detect and measure almost any gas, combined with the robustness and reliability of the technology, makes FTIR ideal for a wide variety of applications.
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Wall Transformer, Converters & Chargers
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PeakTech Prüf- und Messtechnik GmbH
An appliance for holding or inserting a charge of power.
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Three-Phase Transformer Winding Resistance Meters
TWA Standard Series
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When it comes to winding resistance measurement on three-phase power transformers and autotransformers, TWA Standard series offers some of the most technically advanced instruments with LCD display in the market. Both models are capable of testing six transformer windings with a one-time cable connection, as well as three-phase automatic transformer demagnetization. The stored magnetic energy is safely automatically discharged at the end of the test. The built-in tap changer control unit enables automated test mode, where the instrument operates the tap changer without operator input and records winding resistance results based on pre-selected stabilization criteria. This option makes the operator’s job significantly easier.Both models can output test currents from 5 mA to 25 A DC for the purpose of winding resistance measurement. TWA40D has a special test mode for checking the synchronization of on-load tap changers with three phases simultaneously tested in parallel, in which the total test current can rise to up to 40 A DC.TWA40D has additional advantages when it comes to non-intrusive tap changer analysis. The unique DVtest method enables checking the moving contacts of on-load tap changers during the transition, measuring the transition time, detecting open circuits, and many other types of faults. It is performed with 0.1 ms sampling rate, simultaneously with the measurement of tap changer motor current which helps with the detection of motor and mechanical issues. A special proprietary algorithm is used for testing tap changers connected through a built-in series (booster) transformer. The DVtest can be performed either on one phase or on three phases simultaneously. It can also be performed as an additional test simultaneously with the winding resistance test in all tap positions.An additional unique advantage of TWA40D is the capability of simultaneously testing the winding resistance of all three phases of a three-phase transformer (connected in a YN configuration). This can significantly shorten the total testing time – for example, it enables the operator to perform 33 measurements instead of 99 on a tap changer with 33 tap positions.The test leads for TWA three-phase transformer winding ohmmeters are interchangeable with the TRT turns ratio testers, which means that both sets of tests can be performed with a single test lead connection to the power transformer terminals.
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Multiple Gas Transformer DGA
MINITRANS
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Based on the same core technology as the highly successful TRANSFIX the MINITRANS is a lower cost alternative, monitoring three key gases: Hydrogen, Acetylene and Carbon Monoxide (in ppm) plus moisture in oil (%RH & ppm). The measurement of these gases allows the user to detect a wide range of developing faults including arcing.
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Mixed Signal, Multi-Functional Test Module
PXIe-ScanIO-112
Test Module
The PXIe-ScanIO-112 delivers a powerful combination of digital, analog, and AC-coupled testing in a single PXIe module. With 104 boundary-scan controllable digital I/O channels and 8 analog I/O channels ranging from –15V to +15V, engineers gain the flexibility to test a wide variety of board-level designs. The module supports IEEE-1149.6 AC-coupled interconnect testing, configurable single-ended and differential pin operation, and integrates seamlessly with the Corelis ScanExpress™ suite.
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Current Transformer Tester
CTT
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The CTT is designed to test the current transformer ratio, Phase shift, Polarity, Excitation, Saturation, Winding resistance and Insulation resistance using the voltage method in compliance with ANSI/IEEE C57.13.1 and IEC 60044-1 standards, where voltage is applied to the secondary X terminals of the current transformer.
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Transformer Testing And Monitoring
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Can detect the symptoms of transformer failure by monitoring the cooling system, load tap changer, dissolved gas, bushing power factor and capacitance, partial discharge, oil levels, pressure, temperatures and more.
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Fixture Self-Test Controller and Calibration Check
AQ818
Test Fixture
The module AQ818 includes all the electronic blocks required to perform an effective test platform self-test. Thanks to this module, a chain of tests can be performed, which will end up not only with a report of the defective instruments or switch modules, but also with the relay contacts live expectancy report.
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Loss Measuring System for Transformers
LiMOS
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HIGHVOLT Prüftechnik Dresden GmbH
The transformer loss measuring system LiMOS is designed for highly accurate measurement of losses and other parameters required in the framework of routine and type testing of power transformers. The combined voltage/current sensors and the digital signal processing enable a very compact design with only one HV device per phase with smallest volume and footprint. The digitized and preprocessed signals are transmitted via fiber optic cable to the receiver unit (LiMO-MCSU).
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Series Precision Multi-Ratio Current Transformers
PMT25090
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Power Measurement Technologies Inc.
Precision two-stage toroidal current transformers find application as the reference in determining the accuracy of instrumentation current transformers.
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Transformer Turns Ratio Meter
TTRM 301
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SCOPE introduces state of the art precision three phase Transformer Turns Ratio Meter (TTRM ) designed for field testing as well as factory testing of power transformers, instrument transformers and distribution transformers of all types. Along with turns ratio, this light weight and reliable instrument measures ratio deviation, phase angle deviation, magnetizing current and detects tap-position of single as well as three phase transformers in charged switchyard condition. The instrument has facility to automatically detect vector group of all majority configurations available. The differant AC voltage selection offers high accuracy in measurement.
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Current Transformers
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A range of ring type current transformers suitable for primary currents from 1A-5000A with 1A or 5A secondaries. This standard range of measuring and protective current transformers is available as resin coated or tape wrapped.
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High-Performance Integrated Functional Test Platform
Spectrum-9100™
Test Platform
The Spectrum-9100 is a fully integrated functional test system for factory, depot, and intermediate test applications. It’s the “go to” tester for users needing a mix of digital, analog, mixed-signal, and bus test capabilities across a wide range of products—from legacy boards to advanced systems.
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Fourier Transform Infrared Spectroscopy (FTIR)
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Rocky Mountain Laboratories, Inc.
FTIR Analysis is used to analyze organic materials. Bulk and small particle materials can be analyzed. FTIR microscopy analysis allows for the identification of particle as small as 10 µm.
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Transformer Insulation Testing
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The primary test methods used to assess the condition of the active insulation components in transformers and bushings, on site, include:1) power factor/tan δ,2) variable frequency power factor/tan δ (1 - 500 Hz)3) dielectric frequency response (DFR) [a dielectric response method], and4) moisture in oil measurements (for transformers).
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Transformer Tester
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Kvtester Electronics Technology Co.,Ltd
High precision instrument for measuring characteristic parameters of transformer capacity, no-load and load. The instrument is a multi-function measuring instrument, which is equivalent to the usual two kinds of test instruments: the transformer capacity tester + transformer characteristic parameter tester. The utility model can precisely measure a series of power frequency parameters of a plurality of transformers, such as the capacity, the type, the no-load current, the no-load loss, the short circuit (load) loss and the impedance voltage.
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Series Precision Fixed-Ratio Current Transformers
PMT25100
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Power Measurement Technologies Inc.
Precision two-stage toroidal current transformers find application as the reference in determining the accuracy of instrumentation current transformers.
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Step Up Transformer
MagD
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SCOPE proudly introduces Step-Up Transformer - MagD, specially designed to cater the needs of testing of instrument Transformers. Before new systems are put into service or after any occurrence of fault, the instrument transformers need to be tested for their outputs. It is to be ensured that these instrument transformers are giving proper outputs to the protective relays. MagD is used to plot excitation curves for instrument transformers. Inbuilt voltmeter and ammeter, eliminates the need of external meters for plotting of curves. It can also be used for de-magnetization of transformer cores and also turns-ratio tests can be conducted using MagD.
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Transformer Resistance Testing
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Transformer insulation resistance deterioration is one of the most common causes of transformer failure: a failing transformer is a costly replacement in an electrical system with the potential for a long downtime. If you fail to maintain your transformer with regular insulation resistance testing (as can be carried out by the Megger Transformer Ohmmeter (MTO) series of transformer test equipment) then it’s likely to fail before reaching its maximum operating life.
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Phase Shifting Transformer
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Supreme Instrument Laboratories
Supreme make PHASE SHIFTING TRANSFORMERS are special transformers which provide convenient means to adjust phase angle (power factor) of A.C. loading circuit while testing power factor sensitive device for the full 90 degree LAG through '0' degree to 90 degree LEAD. Based on their rating these Phase shifters are manufactured in two configuration.
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Power Transformer Testing
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Weshine Electric Manufacturing Co., Ltd
Transformer insulation resistance deterioration is one of the most common causes of transformer failure: a failing transformer is a costly replacement in an electrical system with the potential for a long downtime.
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Automotive Electronics Functional Test System
TS-5020
Functional Test
The Keysight TS-5020 Automotive Functional Test System is a low cost, scalable test system designed with “just-enough-test” concept for medium complexity electronic control modules, such TPMS, RKE and body electronic modules
