Current Transformer Test
measures insulation, excitation current, turns ratio, winding polarity saturation and/or winding resistance. Current Transformers
See Also: Transformer Test, Transformer Testers, Current Transformer Test Set
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Product
Three-Phase Transformer Winding Resistance Meters
TWA Advanced Series
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TWA Advanced series is the latest DV Power solution for three-phase transformer winding resistance measurement and tap changer analysis. They are capable of testing six transformer windings with a single cable connection, as well as three-phase automatic transformer demagnetization. It has the option of the automated test mode, where the instrument operates the tap changer without operator input (minimizing the risk of human error) and records winding resistance results based on pre-selected stabilization criteria.The unique DVtest method of tap changer analysis 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, together with the measurement of tap changer motor current which detects 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 simultaneously on three phases. It can also be performed together with the winding resistance test in all tap positions.A unique advantage of TWA Advanced instruments 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 speed up the testing– for example, it enables the operator to perform 33 measurements instead of 99 on a tap changer with 33 tap positions.TWA500 is equipped with a large 10.1” graphical touch-screen display, while TWA400 has a 7” graphical touch-screen display. Besides making the interface much more user-friendly compared to older winding ohmmeters, it also enables certain test options that were previously available only with DV-Win software. The most important among them are DVtest, tap changer motor current measurement, “Heat Run” test, test templates, and automatic test mode.
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Product
Transformer Turn Ratio Tester
KVBB-II
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KV Hipot Power Test Equipment Co.,Ltd
KVBB-II Transformer turn ratio tester is used to check turn ratio of transformer, tap switch situation, whether transformer interturn is short circuit and transformer can run in parallel or not.
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Product
Transformer Winding Resistance Meters
RMO TT Series
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The Tap Changer Analyzer & Winding Ohmmeter of the RMO-TT series is designed for winding resistance measurement of inductive objects, and for a tap changer analysis. The RMO-TT series is based on the state of the art technology, using the most advanced switch mode technology available today. The RMO-TT instruments are accurate (0,1%), powerful (up to 100 A) and still portable. The Instruments generate a true DC ripple free current with automatically regulated measurement and discharging circuit. RMO-TT instruments can perform a simple, quick and reliable transformer on-load tap changer condition assessment. This series of instruments enable measurements of a winding resistance in every tap position, current ripple values (percentage of a current drop during a tap change) and transition times during the tap changes. Problems with a connection, contacts, and selector/diverter switch operation (tap change with interruption) can be detected with these measurements.
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Product
Split type AC Current Transformer
CTS-400
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MULTI MEASURING INSTRUMENTS Co., Ltd.
*5A output for metering application.*Short circuit switch for secondary output is provided for safe operation.*High accurate transformer for the application of first class meter.*Easy to install by metal fitting.
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Product
Current Clamps
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Due to its variable measuring functions, the digital clamp meter can be operated universally. Useful details, such as the large display, manual or automatic ranging and measurement position lighting, makes operation particularly easy and reliable.
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Product
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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Product
Current Measurement Probes
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Comprehensive line of clamp-on current probes covers the entire spectrum of applications, from electrical panels to substations. AEMC Current Probes measure current without interrupting the circuit under test and extend the measuring capabilities of DMMs, recorders, power meters, and loggers. The numerous jaw sizes are designed to accommodate a wide variety of conductor diameters and ranges. Available for AC or DC measurements.
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Product
Current Clamps and Transducers
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High-accuracy Current Sensors and TransducersHigh-accuracy sensors for AC/DC current measurement and power analysis. From current clamps to high-precision zero flux current transducers and Rogowsky coils.
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Product
Current Preamplifier
1211
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The model 1211 Current Preamplifier was designed to provide all of the features required of a modern laboratory preamplifier. It measures cur rents with full scale sensitivity ranging from 10 to 10 amperes.
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Product
Transformer Test Equipment
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KV Hipot Power Test Equipment Co.,Ltd
Transformer Test Equipment. Ensure that a transformer meets performance and reliability requirements, from the production line to after a repair or upgrade, when a major disruptive event occurs such as a lightning strike, or for preventive/predictive maintenance.
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Product
C Series Current Input Module
Current Input Module
The C Series Current Input Module features programmable input ranges, variable connectivity options, and built-in noise rejection. You can also choose from options with built-in anti-aliasing filters or high-channel density to reduce the number of modules needed. The C Series Current Input Module supports safety features, certifications, input ranges, overvoltage ranges, and connectivity for applications such as power quality monitoring and metering, utility pole-mounted smart switches, utility pole-mounted smart grid reclosers, substation merging units, industrial machine measurements, health monitoring, predictive maintenance and prognostics, and phasor measurement units (PMUs). The C Series Current Input Module includes the NI-DAQmx driver and configuration utility that simplify configuration and measurements. NI-DAQmx supports NI programming environments as well as Python, ANSI C, C#.NET, and MathWorks MATLAB® software.
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Product
Current Sense Resistors
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Panasonic Industrial Devices Sales Company of America
Panasonic offers a wide variety of Thick Film Current Sense Resistors (ERJ-B1, B2, xB, xBW, xCW) in a large range of case sizes and in wide terminal types for high solder joint reliability. The ERJ Series of Current Sense Resistors offers power ratings up to 2W with low ohmic ratings ranging from 5mΩ to 10Ω. Panasonic’s Thick Film Current Sense Resistor portfolio offers a more cost effective option with high reliability. Panasonic has a wide line of case size options ranging from 0402 to 2512 in conventional terminal and 0612 to 1020 for wide terminal.
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Product
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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Product
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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Product
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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Product
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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Product
Meters for Current & Voltage
EE301-DCM-xx
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LCD Current Readings:0-80.0 / 40.0 / 20.0. LCD Voltage Readings:0-50.0 / 150.0
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Product
AC/DC Clamp-On Current Transformers
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AC/DC Clamp-On Current Transformers by AYA Instruments
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Product
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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Product
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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Product
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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Product
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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Product
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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Product
Precision Current Preamplifier
SIM918
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Stanford Research Systems, Inc.
The SIM918 Current Preamplifier is ideal in applications in which the input offset voltage must be kept to a minimum. The DC voltage difference between the two inputs (current input and voltage bias) is accurately measured every 2 seconds, and is nulled.
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Product
Primary Current Injection Testers
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Primary Current Injection Tester is designed for testing protective relay and circuit breakers and also testing the turns ratio of current transformers at high variable currents. A test current is injected into the primary side of a system to determine how the system behaves at particular levels of current. This test makes it possible to determine whether the relay will trip and how long the current needs to flow before the trip is initiated.
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Product
Profiling Current Meter and Wave
SeaGuardII DCP Wave
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The SeaGuardII DCP Wave is a 600kHz Doppler Current Profiler able to measure directional wave parameters and currents from a bottom mounted installation.The Acoustic Wave software 5759 used by the DCPS implements unique features to improve the wave measurement accuracy by optimizing the signal to noise ratio.Maximum deployment depth is 40m in normal scatter conditions. The Profiling Current Meter and Waveis available as a self-recording instrument. It can be easily integrated into a real-time system offering reliable two-way communication.
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Product
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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Product
Eddy Current Sensor
eddyNCDT 3001
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The eddyNCDT 3001 is a new, efficient eddy current sensor whose compact dimensions have to date only been reserved for inductive sensors and proximity sensors. The temperature-compensated design provides high stability even in fluctuating ambient temperatures. The eddyNCDT 3001 comes with integrated electronics, offering an outstanding price/performance ratio and easy operation. The eddyNCDT 3001 eddy current sensor is ideally suited to OEM integration and machine building applications. The sensor is factory-calibrated for ferromagnetic and non-ferromagnetic materials, which eliminates the need for field calibration of the sensor. The eddyNCDT 3001 is available with connector or with integrated cable. A robust design combined with the eddy current measuring principle enables measurements in harsh industrial environments (oil, pressure, dirt). In addition, the eddyNCDT 3001 is suitable for offshore/marine applications (salt water).
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Product
Current Probe
PA-622
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*Max. ±100A DCA*Resolution: ≧10mA*Bandwidth: DC~300KHz*Rise Time: 1.2 uS*Over Range Function*10mV/A, 100mV/A Range*Adaptor/Battery Input*Separating Design,Convenient Durable
