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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IEC Standard Burden Sets (Current)
IEC Burden Sets
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Testing and calibrating current transformers often requires standard burdens of reliable accuracy and stability, and burdens that are immune to stray fields and harmonics. These burden sets have been carefully designed to meet these requirements. They also provide the standard burdens required for the testing of current transformers for metering service, and for the testing (within the current rating provided by the sets) of current transformers for relaying applications, all as called for by IEC (International Electrotechnical Commission) Publication 185: 1987.
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Product
Transformer Winding Resistance Meters
TWA Standard Series
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The TWA standard series instruments are designed to measure the resistance of six coils and simultaneously analyze the three-phase tap changer on load of the primary and secondary transformer coils (provided by model TWA40). This is done in a single cable configuration, with test currents up to 40A. Each transformer configuration has a special measurement algorithm that is optimized for rapid stabilization of test results. The TWA instruments generate a true DC current without ripple. Both current injection and magnetic circuit energy discharge are automatically regulated.
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Product
High Current capacity testing from Intelligent Charging
CT75A
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A UK-based helicopter manufacturer wanted high capacity testing capability for their helicopter batteries and came to Intelligent Charging for a Special Unit. As a result of the above requirement, Intelligent Charging designed and built this new capacity testing unit to add to our extensive range of intelligent battery charging and capacity testing products. With up to 100.0A capacity testing capability this model will satisfy the most demanding aviation battery.
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Product
Transformer Polarity Checker
865
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This instrument is used to check the correctness of polarity markings on transformers. In operation, the two leads carrying the test current are connected to one of the transformer windings. The other two leads from the indicating meter are connected to the other winding.
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Current Probe
PA-699
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*High sensitivity: 1mA, High frequency: 1.5MHz. They are all 10 multiple calculation. Calculation is not making mistakes.*Max measuring current: +/- 40A DC / 80 Ap-p*Max sensitivity: ≧1mA*Bandwidth: DC ~ 1.5 MHz*Rising Time: 0.23 uS*Overload indicator*1V/A, 0.1V/A 2 ranges selectors*Input power switching (priority circuit) and battery available*Dispatching design, high durability
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Impulse Current Test Systems
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Fivestar HV Testing Equipment Co., Ltd.
Impulse current test systems are mainly used for testing transmission and distribution systems against the effects of direct or indirect lightning strokes or against electromagnetic interference effects. Primary application of impulse current test systems is the testing of surge arresters, nowadays mainly of the metal-oxide type (MOA) and surge protection devices (SPD). Now they are also widely used to test vehicles, aircrafts, and military applications.
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Product
32CH 4-20mA Current Sink Card
SET-1250
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Each channel provides an isolating relay and a short-circuit MOSFET with which opening and short-circuit errors can be simulated. The short-circuit MOSFET has overcurrent protection with integrated current limitation.
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High Current DC Transformerd
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High Current DC Transformer provides very accurate DC current measurements up to 3000 A with output current that varies directly with the input current in three ranges. This direct current transformer is designed with an open window to pass a single cable, set of cables, or buss bar that carry the direct current to be measured.
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Wide Range Flexible Current Probe
EFX6000
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The EFX6000 is a flexible AC current clamp utilizing the Rogowski principle. It can be used to measure currents from 1 amp to 6000 Amps in 2 auto-ranges, over a wide frequency range to 10kHz. The flexible and lightweight measuring head allows quick and easy installation in hard to reach areas, around large conductors and where access to confined or tight spaces is a problem. It requires no batteries or external power supply.
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Current Transducer
IN 1000-S
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For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit. 1000 A nominal, 3 ppm linearity over the temp. range, Very low offset drift 19.5 ppm, low noise 34 ppm peak-peak, -40 to +85°C, one compact package.
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Current Sense Magnetics
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Current sense magnetics are used as a low loss method for sensing AC current in a circuit and also provide electrical and safety isolation between the source of the current and the measurement circuit. The key parameters for a current sense transformer are the rms current rating (to ensure it does not overheat in the application) and the safety and voltage isolation (to ensure it conforms to the end-application requirements).
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Regenerative Battery Pack Test System
17040
Test System
Conforms to international standards for battery testing: IEC, ISO, UL, and GB/T, etc.Regenerative battery energy discharge (Eff. >90%, PF >0.95, I_THD <5%)Multiple voltage and current ranges for auto ranging function to provide optimum resolutionHigh accuracy current/voltage measurement (0.05%FS/0.02%FS)2ms current slew rate (-90% ~ 90%)Dynamic (current/power) driving profile simulation tests for NEDC, FUDS, HPPCTest channel parallel functionTest data analysis functionData recovery protection (after power failure)Automatic protection for error conditionBattery simulator (option)High power testing equipment- Voltage range : 80~1000V - Current range : 0~750A - Power range : 0~300kWCustomized integration functions- Integrated temperature chamber - BMS data analysis - Multi-channel voltage/temperature recording
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Single Gas Transformer DGA
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Hydran composite gas Dissolved Gas Analysis (DGA) products provide essential online monitoring of transformer oil. The Hydran line is the perfect cost-effective application for small- and medium-sized transformers where customers need to know about developing fault conditions that could cause unscheduled outages.The Hydran products allow for the addition of expansion to the base unit, allowing for greater measurement accuracy
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Primary Current Injection Testing
KAM
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This substation testing device is designed to grant high current output when needed in substation commissioning activities.
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Direct Winding Transformer Monitors
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Real time comparison of calculated and direct winding temperatures
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Current Probe
DCP-BTA
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Vernier Software & Technology, LLC
The Current Probe measures DC and low-frequency AC currents up to 600 mA. Use Current Probes in combination with Differential Voltage Probes to investigate Ohm's Law and explore series and parallel circuits. The 0.1 shunt resistor minimizes changes to your circuit. If currents will exceed 1 A, use the High Current Sensor.
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Precision Current Sources
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HighFinesse Precision Current Sources have been developed for experiments and quantum technologies in the areas of cold-atom and solid state physics. The linearly regulated BCS (Bipolar Current Source) and UCS (Unipolar Current Source) series deliver highly stable, low noise source currents for high precision magnetic field control. The current output is floating or is on a used defined potential. Ultrafast response to control signals and trigger functions, clear grounding, connection and signal isolation schemes make the integration of the current sources into complex experimental systems easy.
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Current Loop Supply Isolating Transmitter
Model TWS / TWS 2
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Kusam Electrical Industries Limited
• Aux. Power AC 85 ~ 265V or DC 85 ~ 300V• High Accuracy 0.1% RO at 23 °C ± 5 °C• Output User Selectable• PC Plastic Case, DIN Rail or Wall Mounting• High Dielectric Strength (AC 1.5KV/Min, between Input / Output / Power)
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Eddy Current Chassis Dynamometers
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Cradle- or single-roll (top-mount) dynamometers accommodating single- or tandem-axle vehicles, with continuous vehicle power ranges from 50 hp to 622 hp (37 kW to 464 kW), Taylor’s chassis dynamometers allow a top recommended speed of 90 mph (145 kph) at full load. Look to our experts to not only help you select your optimal system, but also to provide design, configuration, installation and training for a total solution that integrates seamlessly with your operation.
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Voltage and Current Amplifier
CMS 356
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The CMS 356 is a voltage and current amplifier for analog low-level signals provided by a CMC test set or by any other signal source, such as a digital real-time power system network simulator. When used in combination with a CMC test set, the amplifier extends the capabilities of the test set to provide additional output channels and higher amplitudes.
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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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Lightning Current Generator
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Shanghai Guantu Technology Co., Ltd.
The lightning wave impulse current generator is an impulse current generator that generates a simulated lightning current waveform . Its working process is as follows: first, the transformer charges the capacitor bank through the silicon pile, when the charging voltage reaches a predetermined value, the spark gap is triggered, and the capacitor is discharged through the total inductance and total resistance of the circuit. When the resistance is greater than or equal to the critical damping value, a unidirectional impulse current wave is generated in the circuit. When the resistance is less than the critical damping value, an oscillating impulse current wave is generated. The magnitude of the impact current amplitude is related to the circuit parameters. When the capacitance value and charging voltage are the same, the smaller the inductance value, the greater the current amplitude. In order to obtain as much current as possible, a pulse capacitor with a small inductance value is usually selected, and the total length of the connecting line should be as short as possible when arranging the main capacitor, so that the total loop inductance value can be reduced as much as possible.
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Partial Discharge Detection and Localization System for Power Transformers
AE-150™
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The AE-150™ is designed to detect and localize Partial Discharge activity by correlating acoustic and electric sensors’ data. The AE-150™ has many acquisition modes, each used for detecting and locating Partial Discharge activity in a transformer. The AE-150™ unit is mounted on the transformer tank using its powerful magnets that also hold four acoustic sensors. Acquired data is sent to Mirador-Tx software where all advanced positioning functions are implemented. This cutting-edge software allows easy data interpretation, reporting and monitoring.
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Power Transformer Testing
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HAOMAI Electric Test Equipment Co., Ltd.
Testing products for power transformers.
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Transformer Turns Ratio Testers
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Transformer turns ratio testers from TRT series are DV Power instruments mainly designed for the measurement of power transformer turns ratio. Also, they measure transformer excitation current and phase shift. Special tests, such as automatic vector group detection and magnetic balance, can be performed on three-phase transformers and three-phase autotransformers.All models, except TRT03 series, have a built-in true three-phase power source, which is necessary for testing turns ratio of transformers with special configurations, such as phase-shifting, rectifier, arc-furnace, traction transformers, etc.DV Power turns ratio testers can output various test voltages for different applications. From the extremely low test voltage of 1 V AC that enables turns ratio verification of the majority of current transformers, up to the highest test voltage of 500 V AC that provides the most accurate turns ratio testing of power transformers used in power generation and transmission. By using the external booster, test voltage increases up to 5 kV AC in order to successfully test capacitive voltage transformers.All DV Power turns ratio testers have a built-in tap changer control unit. Because of that, it is possible to control the on-load tap changer (OLTC) directly from the device. In order to make the most out of this feature, the instrument and included DV-Win software can be programmed to do everything automatically – running turns ratio tests, changing OLTC tap positions, and saving results. This option significantly facilitates and shortens the turns ratio testing time.TRT turns ratio testers use the same set of cables as three-phase winding ohmmeter & tap changer analyzers from the TWA series. Consequently, it enables one-time cable setup for performing eight tests:turns ratioexcitation currentphase anglemagnetic balancevector group detectionwinding resistanceon-load tap changer DVtestand demagnetization.
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Distribution Transformer Tester
NDB-DOC-3™
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The NDB-DOC-3™ is a test instrument designed for distribution networks transformers from 5kVA to 3MVA. It can determine the presence of short circuits or open circuits in the distribution transformer primary winding & also short circuits on the secondary winding.The NDB-DOC-3™ is designed to be operated without disconnecting the transformer’s secondary windings from their loads.
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Integrated Transformer Test Van
XD90
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Hangzhou Xihu Electronic Institute
The XD90 integrated modular power system testing vehicle provides an integrated yet flexible solution of preforming a wide selection of normal and specialty tests on power equipment. Designed with the effectiveness and efficiency of power testing in mind, this platform achieves the goal of “integration of functions” instead of just a “combination of instruments”. Not only it provides an abundant means of power testing, but with optimized device placement, operational convenience, and safety factor.
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Through Hole type DC Current Sensor／for DC Leakage Current Measurements
DCZCT-20MH
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MULTI MEASURING INSTRUMENTS Co., Ltd.
*DC earth fault measurement for solar power system*Least affection from the magnetization of core and temperature fluctuation*DC leakage current measurements*Convenient ＋5V single polarity power supply
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Clamp type AC Current Sensor／for Leakage Current Measurements(ZCT Series)
HFCT-34
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MULTI MEASURING INSTRUMENTS Co., Ltd.
Clamp type AC Current Sensor／for Leakage Current Measurements(ZCT Series)
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High Side Current Sense Amp
QA150
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The QA150 makes ultra-low current measurements of your toughest real-time projects a snap. The QA150 is a high side current to voltage converter. Simply tap into the supply for your various project rails (5V, 3.3V, etc) and the QA150 will convert the currents to voltages that you can then capture on your scope, along with whatever other signals you might need. If you are trying to squeeze every last bit of energy from your batteries, the QA150 is your answer.
