Transformer Turns Ratio
measures a transformer's number of primary winding turns to it's secondary turns.
See Also: Winding, Transformer Turns Ratio Testers
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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
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
Forward Path NPRT 2200 Noise Power Ratio Test Set
NPRT 2200-F
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The NPRT 2200 measures the NPR of a device across a range of power levels. This test quantifies intermodulation distortion and determines the dynamic range of optical transmitters, amplifiers and other active HFC network devices. The included PC software uses predefined test setups to run a "Power Sweep" series of NPR measurements and graph the results.
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Product
Adjustable Isolating Transformers
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PeakTech Prüf- und Messtechnik GmbH
The PeakTech 2235 is a 2 in 1 laboratory isolating transformer with integrated DC power supply, which was designed with the aspect of high safety requirements for use in research, science and repair. The device has a dual adjustable DC, AC output, which can also be used for constant voltage or current and offers high stability and performance. The output voltage or the output current can be read exactly on two separate 3-digit LED displays and the fixed output supplies a voltage of 5 V. The device is protected against damage by overload and short circuit by reliable overvoltage protection and can be placed in a 19 ”rack installed or used as a table device (“stand-alone”).
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Product
Testing of Voltage Measuring Transformers
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In this category you will find components for high-voltage testing as well as for testing electronic or conventional voltage measuring transformers.
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Product
Transformer Winding Resistance Testers / TRT ? 2
TRT-2
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UDEYRAJ ELECTRICALS PRIVATE LIMITED
Fast measurement: Test current 0.02A to 2A DC, Digital display of resistance and test current.
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Product
Isolation Transformers 230V
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PeakTech Prüf- und Messtechnik GmbH
Due to the high safety requirements in service workshops, schools and industry, an isolating transformer is an absolute prerequisite for carrying out professional repair work. Galvanic isolation between primary and secondary voltage during measurements and repairs on open devices guarantees a high safety standard for the user. Of course, galvanic isolation from the mains voltage also offers other advantages in electronics development, audio technology and many other areas.
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Product
Transformer Short Circuit Impedance Tester
JYW6300
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This instrument is mainly applicable to low voltage load impedance test of 35kV and above power main transformers (single phase or three phases) in ex-works routine tests, overhaul tests, pre-tests, and acceptance tests.
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Product
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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Product
2 Channels, MIL-STD-1553, Dual Redundant, Transformer Coupled, Assisted Mode Capable (AMC)
FTB
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MIL-STD-1553 is a military standard published by the United States Department of Defense that defines the mechanical, electrical, and functional characteristics of a serial data bus. It was originally designed for use with military avionics, but has also become commonly used in spacecraft On-Board-Data-Handling (OBDH) subsystems, both military and civil. It features a dual, redundant, balanced-line, physical layer; a (differential) network interface; time division multiplexing; half-duplex command/response protocol; and up to 31 remote terminals (devices).
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Product
400/5A CHEAP SPLIT CORE CAST RESIN CURRENT TRANSFORMER
LZCK310-10
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Beijing GFUVE Electronics Co.,Ltd.
LZCK series outdoor waterproof current transformers are applicable for AC power system 35kV and measurement of current of power supply equipment below 10KV also can be used for microcomputer protection. This type of current transformer employs imported silicon steel which with high permeability as magnetic material, has the characteristics of Small magnetic circuit loss and can be split, its semicircular core and secondary windings employ high quality epoxy resin vacuum, casting in plastic-case(ABS or PC) which is flame retardance anti-moisture, stable performance, no maintenance.
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Product
Fourier Transform Infrared Spectrophotometer
IRTracer-100
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This system achieves excellent sensitivity with an SN ratio of 60,000:1, high resolution at 0.25 cm-1, and high-speed scanning capable of 20 spectra/second. The performance of medium and higher end models is supported by high reliability including advanced dynamic alignment and an interferometer with a dehumidifier. This is compatible with applications active in a variety of circumstances, with a library of approximately 12,000 spectra and data analysis programs for contaminant analysis, and time course and rapid scan programs for reaction tracking.
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Product
Three-Phase Transformer Demagnetizer
DEM60C
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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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Product
Current Transformers And Shunts
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Current transformers allow the different measuring devices to provide reliable and traceable data on the trends involving consumption and production processes in electrical installations. Especially designed to be installed quickly, easily and securely, meeting the most demanding expectations of today's market, covering a wide range of primary currents as well as multiple secondary outputs, both for AC and DC measurement.
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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
Transformer Ratiometer
TR-1C
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Model TR-1C Transformer Ratiometer is a precision test set with an easy-to-read in-line digital readout from 0.00001 to 1.00000, suitable for testing all types of single and three-phase power distribution, potential and current transformers.
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Product
DELTA™ IV 4-zone Flow Ratio Controller
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DELTA™ IV 4-zone Flow Ratio Controller is a digital controlled, browser-enabled, process control instrument providing the latest gas flow ratio measurement and control technology to meet the demands of multi-channel flow distribution for semiconductor, flat panel, and solar panel process uniformity and control. It is available in EtherCAT® or DeviceNet™ providing the latest gas flow ratio measurement and control technology to meet the demands of multi-channel flow distribution.
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Product
Quasi Square Wave Constant Voltage Transformers
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Osborne Quasi Square Wave Constant Voltage Transformers are used to regulate output voltages for applications that have varying input voltages. When used with a rectifier conversion circuit, these units provide an elegant design approach to voltage regulation. Osborne achieves this innovative approach by partnering the constant voltage transformer with an auxiliary resonant capacitor winding. The result is a unique (though time honored) technology that offers reliability, performance, and cost advantages over other styles of voltage regulation.
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Product
Transformer Test
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Beijing GFUVE Electronics Co.,Ltd.
Check whether the performance of the transformer meets the requirements of relevant regulations and technical standards.
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Product
Current Transformers
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Contrel Elettronica s.r.l. Company
We can supply current transformers (measure transformers, protection transformers and double ratio transformers, with analog output) with the following accuracy classes: 0.1, 0.2s, 0.5s; 1; 3. A wide range of combinations is available in our standard range with specific versions available upon request (other ratios, specific frequency, class or load). They are equipped with sealable terminal covers as standard.
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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
Split Core Current Transformers
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Application:Watt Transducer, Current Transducer, KWH Meter, Demand Meter, Power Factor Meter, Current Sensing Relays, Energy Management SystemsContinuous Thermal: Rating 1.25 at 30° C, 1.0 at 55° C Standard 5-amp secondary. Others available.
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Product
Split type AC Current Transformer
CTS-100
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MULTI MEASURING INSTRUMENTS Co., Ltd.
*1A 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 installation by metal fitting.
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Product
Transformer Ratio Meter
TRM 1000
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AJIT Transformer Ratio Meters are the most modern turn's radio meters widely used to test the turn's ratio of high voltage windings, to low voltage windings, of Transformer. These meters are accurate, compact & light in weight.
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Product
4 Channels, MIL-STD-1553, Dual Redundant, Transformer Coupled, Assisted Mode Capable (AMC)
FTC
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MIL-STD-1553 is a military standard published by the United States Department of Defense that defines the mechanical, electrical, and functional characteristics of a serial data bus. It was originally designed for use with military avionics, but has also become commonly used in spacecraft On-Board-Data-Handling (OBDH) subsystems, both military and civil. It features a dual, redundant, balanced-line, physical layer; a (differential) network interface; time division multiplexing; half-duplex command/response protocol; and up to 31 remote terminals (devices).
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Product
True Online UPS Systems with Inbuilt Isolation Transformer
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Our software and connectivity devices incorporate all the features you need to proactively manage your systems, from basic monitoring and shutdown to predictive analysis and power management. Aplab Integration Services offer complete solutions tailored for the specific requirements of Defense Services, Telecom and Commercial markets.
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Product
Software for Bit Error Ratio Testers
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Customize your bit error ratio tester (BERT) with additional functions and features from an easy-to-use GUI to ensure you get the most out of your test instrument.
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Product
Current Transformer
ST-30RCT
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Standard Electric Works Co., Ltd
● Primary Current Rating (Amp) : 1600~4000
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Product
Transformer Monitoring
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MTE offers a broad range of products and solutions for the online gas-in-oil monitoring of transformers (online DGA). With its individual and modular system components MTE provides the optimal customer oriented solution for utilities, industries and transformer manufacturers.
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Product
Current Transformers
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Supreme Instrument Laboratories
Portable Low Tension precision grade multi ratio Current Transformers, housed in laminated wooden cabinet, wound primary with suitable terminals on highly insulated bakelite panel upto 100 Amps. For higher ranges, a centre hole is provided for passing primary conductors for desired range.
