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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Voltage and Current Measuring Technology
HIGHVOLT Prüftechnik Dresden GmbH
Designed for the measurement of alternating current (AC), direct current (DC), lightning (LI) and switching (SI) impulse high voltages (HV) as well as AC and impulse high current (HC) according to IEC 60060, IEC 61083 and IEC 60052, available as indoor and outdoor design.
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IEC Standard Burden Sets (Current)
IEC Burden Sets
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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Transformer Resistance Testing
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. If you fail to maintain your transformer with regular insulation resistance testing (as can be carried out by the WESHINE Transformer Ohmmeter (VS-3110 series) of transformer test equipment) then it’s likely to fail before reaching its maximum operating life.
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Eddy Current Electric Conductivity Meter
Measures the conductivity of a solution by measuring the alternating magnetic field generated by the solution.
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Current Probe
PA-699
*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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Automatic Transformer Test System
TH2840NX
Changzhou Tonghui Electronic Co., Ltd.
■ The test speed is as high as 1000 times/s (>10kHz), without relay action time ■ Test level up to 20Vrms ■ The bias voltage is built-in ±40V/±100mA/2A ■ Up to 288 test pins (only TH2840NX) ■ Industry-friendly user experience: Linux bottom layer, built-in help file
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Primary & Secondary Current Injection Testing Sets
Primary current injection kits are used to test and commission Circuit Breakers, Bus Bars, CTs, Relays, MCCs, PCCs etc. These are also used for high current injection and simultaneously measuring voltage drops and hot spots in bus-bar joints, Circuit Breaker Contacts etc.
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Current Measurement
Measurements International Ltd.
No Stabilization Period, No Power Coefficient, No Temperature Coefficient, DC and AC Operation, 3000 A Max Current DC.
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Opto-Isolated Current Loop Signal
4029
SPECTEC Innovative Sensor Solutions
SPECTEC's Model 4029 digital opto-isolated current loop signal conditioner prevents ground loops and interrupts any galvanic signals riding on magnetic speed sensor's output signal.. This signal conditioner converts magnetic, variable reluctance and inductive sensors' sinusoidal signals into a 4-20 mA output suitable for interfacing with process control units, dataloggers, flow controllers, and computers.
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16-Ch SPST 10A-277VAC High Current
YAV90086
16 power relays SPST Switching up to 2770VA 16A Switching 125Vac 10A Switching 277Vac CAN Control (or Ethernet with Ethernet to CAN Gateway) Drivers dll & VIs available
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Precision Current Sensing Resistors
PCR4T
Precision cement resistors designed with four terminals, are distinguished by excellent long term stability & TCR. The Kelvin connections of this device allow high precision measurements even with low resistance values. PCR 4T has a non-inductive copper manganin element inserted into the ceramic case and finally sealed with a ceramic molding. This resistor has low inductance and has high pulse power.
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Current logger0 to 20mA
TK-4802
Supplied with an input cable, this logger can measure current between 0 and 20mA DC and can be connected to many industry standard devices, such as CO2 sensors and current clamps, enabling the logging of a wide range of process parameters.
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Current Probe For Multimeters
CP 1000
The CP 1000 current probe has been designed for use with multimeteres respectively for accurate, non-intrusive measurement of AC, DC and complex waveform currents.
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Leakage Current Measurement
CX-2675C3
Shenzhen Chuangxin Instruments Co., Ltd.
Leakage Current Measurement Output voltage:0~250V (AC/DC)
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Transformer Ratio Meters
The TRT is based on state-of-the-art technology and uses the most advanced technique available today. The test equipment can be used to test both single-phase and three-phase transformers, both with and without tap changer in accordance with the requirements of IEC 60076-1.
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Clamp type AC Current Sensor／for Load Current Measurements(CT Series)
CT-33
MULTI MEASURING INSTRUMENTS Co., Ltd.
*Compact size*AC 1A～200A*Current measurements of feeder
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High Voltage Transformer
RR manufactures HIGH VOLTAGE TRANSFORMERS for various Industrial Applications.
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Iron Core Current Limiting Reactors
Current Limiting Reactor (CLR) is one of the most effective short circuit current limiting devices. It reduces stresses on busses, insulators, circuit breakers and other high voltage devices. Use of CLR is the most practical and economical approach at current limiting.
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Clamp type AC Current Sensor／for Low Leakage Current Measurements(ZCT Series)
ZCT-18S
MULTI MEASURING INSTRUMENTS Co., Ltd.
*Best sensor for low leakage current measurements of less than 1mA.*Ultra compact size with 18mmφ jaw opening capability.*High sensitivity and least affection from external magnetic field.
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Current Source-Sink D/A Converters
Analog Devices’ current source D/A converters (DACs) portfolio is ideal for photonics control applications where low current noise density, low dropout voltage, and high power efficiency, in addition to high channel density, is critical to system performance. The flexibility of the configurable current source D/A converter outputs, and 300 mA current delivery, make them suitable for resistive heaters and proportional solenoid drive.
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High AC Current Capacitors
HK Film Capacitors offer a selection of High AC Current Capacitors ( continuous duty) with Temperature up to +105C
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AC Current Shunts
AC Current Shunts feature low uncertainty (high accuracy), low temperature coefficients and excellent stability. These shunts are purely resistive with extremely small values of reactance. The 7340 shunts may be used over a wide frequency range from DC to 100 kHz and are optimized for use with thermal converters.
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Transformer Polarity Checker
865
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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Software For Transformer Measuring Lite
T-Base Lite
T-Base Lite is intended for users preferring simplicity over complexity of the Pro version. It is limited to the basic functions of USB interface, data import, data export, synchronization, and automatic firmware updates. Data can be exported in many popular data formats such as Excel, Word, text, .csv, .xml, Crystal reports, and .html. Measurements can be saved as archive files and imported into the database of the T-Base Pro version.
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Current Injection
K&S Engineering and Scientific Ltd
The outputs are continuously variable from zero and are all isolated. The current outputs can be used at twice their continuous rated current on a 25% duty cycle with a maximum ON time of 5 minutes.
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Through Hole type DC Current Sensor／for DC Leakage Current Measurements
DCZCT-20MH
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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Partial Discharge Detection and Localization System for Power Transformers
AE-150™
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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Mini AC Leakage Current Clamp Indicator
MLD-18
MULTI MEASURING INSTRUMENTS Co., Ltd.
・The LED will blink when detection leakage current exceeds AC 15mA.・Supports ELB with high-speed detection of 20ms.・The operating period is about one month, which is suitable for detecting intermittent leakage current.
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Lightning Current Generator
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.
