Showing results: 151 - 165 of 393 items found.
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IBEKO Power AB
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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STCS PLUS -
Altanova Group
The external module STCS Plus allows to run automatically and with a single set up, any kind of tests on power transformer.
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DEM60C -
IBEKO Power AB
After a DC current test, such as winding resistance measurement, the magnetic core of a power or instrument transformer may be magnetized (remnant magnetism). It can cause various problems such as wrong diagnostics, inaccurate measurements on a transformer, inrush current at the start-up of a power transformer, or incorrect operation of protective relays due to magnetized CT cores. The best way to eliminate this source of potential problems is to use demagnetizer on the power or instrument transformer.The DEM60C is a fully automatic test instrument which performs three-phase transformer demagnetization. Transformer magnetic core demagnetization requires the application of AC current with magnitude decreasing to zero. DEM60C provides this AC current by internally changing the polarity of a controlled DC current. During the demagnetization process, the instrument supplies the current at decreasing magnitude for each step, following a proprietary algorithm. It can demagnetize single-phase and three-phase power transformers.The instrument can be connected to all three phases of a power transformer to be demagnetized, on either the primary or the secondary side. If a user selects specific vector diagrams for different types of transformers, DEM60C will run a specific demagnetization procedure for each transformer type (i.e., single phase, delta, wye/star, zig-zag.) without switching the test leads.DEM60C enables safe and efficient power transformer demagnetization. The instrument automatically regulates the injection of current and discharging energy from the inductance. During and after the operation, an intrinsically safe discharge circuit with an indicator rapidly dissipates the stored magnetic energy. The discharging circuit is independent of the power supply, which improves its reliability in case of loss of power.Test currents of up to 60 A DC enable efficient demagnetization of even the largest power transformers. Using a DV Win software, it is possible to control DEM60C externally.
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GTU-1200KVA/600KV -
Wuhan Sangao Electrical Test Installations Limit Co.
SF6 gas -filled testing transformers are especially designed for GIS in the factory and on-site test,and for testing all GIS switchgears and GIS components such as insulators,insulating tension pole,GIS voltage transformer and so on,the PD test can be performed under the general environment because of the merits of encapsulation ,the PD level of our equipment can be lee than 3pC,and it can be added a HV bushing to perform the withstand voltage test at the same time.
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GTU-800KVA/800KV -
Wuhan Sangao Electrical Test Installations Limit Co.
SF6 gas -filled testing transformers are especially designed for GIS in the factory and on-site test,and for testing all GIS switchgears and GIS components such as insulators,insulating tension pole,GIS voltage transformer and so on,the PD test can be performed under the general environment because of the merits of encapsulation ,the PD level of our equipment can be lee than 3pC,and it can be added a HV bushing to perform the withstand voltage test at the same time.
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Handheld Turns Ratio & Winding Resistance Tester TWR-H -
Amperis sl
TWR-H is a handheld, battery operated, fully automatic test set specially designed for turns ratio, phase shift, excitation current and winding resistance measurements of transformers. It can also perform demagnetization of these transformers. Transformer turns ratio is determined by applying AC voltage across high voltage winding, accurately measuring AC voltage across the corresponding unloaded transformer winding, and then displaying the ratio of these voltages. User can enter a transformer’s nameplate voltages, so that turns ratio deviation can be calculated. This feature eliminates any error otherwise caused by an operator’s manual calculation. TWR-H compares measured turns ratio with the nameplate ratio and prints out the % of error for each test. Transformer 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 transformer magnetic circuit are automatically regulated.
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Educated Design & Development, Inc.
As a general purpose dual-voltage isolation transformer for step-up (120 to 240 VAC), step-down (240 to 120 VAC), or straight 1:1 isolation (120 to 120 VAC or 240 to 240 VAC). Models with a suffix "UC" are provided with a safety jack for access to the transformer secondary center tap (connected to the transformer center tap only in the 240 VAC output setting). This connection may be used in conjunction with a Dielectric Voltage Withstand test.
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GIT GIS -
HV Hipot Electric Co.,Ltd.
GIT GIS High Voltage Test Sets integrate the high voltage boosting, high voltage measurement, high voltage transformer,high voltage coupling capacitors and all components in a sealed space.High voltage generated with two modes:using reactor inductance and test object capacitance to realize voltage resonance test, to obtain a high voltage, high current from test object.The other one is to obtain required high voltage directly from high voltage transformer.
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CP TC12 -
OMICRON electronics
The CP TC12 oil test cell is for determining the relative permittivity, the dissipation factor and the power factor of insulating liquids such as transformer oil.
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7000 -
Cambridge Instruments & Engineering Co.
Ideal for speedy and accurate testing of Breakdown / withstand test of transformer and circuit breaker oil, in accordancewith IS 6792 : 1992 for oil testing.
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ZERA GmbH
All components from this category can be integrated into an existing current transformer test system. When selecting CT test components, both the type of converter to be tested and the required current are important.
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Shanghai Jiuzhi Electric Co., Ltd.
SEPS Series Energy Storage High Power Test System are self-contained test sets for high power testing without large capacity power grid support. Just typically using no more than 200kW as a charging power, the high-power test system can independently conduct the short circuit testing for power and distribution transformer, dynamical thermal stability testing for current instrument transformer and cable, short circuit current withstanding test and short circuit breaking / making capacity testing for circuit breaker and etc.
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19035 -
Chroma ATE Inc.
The quality verification tests for wound components consist mainly of AC/DC Hipot tests and insulation resistance (IR) tests. The Chroma 19035 wound component EST scanner series perform safety tests for motor, transformer, and heater related wound products.
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19020 -
Chroma ATE Inc.
The hipot test is one of the major test items in electrical safety testing. All electrical components and products including transformers, capacitors, power supplies, chargers and home appliances require hipot testing.
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