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
Transformer Protection
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Schweitzer Engineering Laboratories, Inc.
Transformer protection products and systems provide complete primary and backup protection for all types of transformer faults. They are suited for use in utility-, industrial-, and commercial-scale power transformer systems.
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Product
Fully Automatic Transformer Winding Resistance Tester
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Measure DC resistance of transformers windings etc. Introduction: The NMC ''TDR'' is a high precision, new generation, light weight large output current and micro-processor controlled tester. This replaces old DC wheat stone bridge and double arm bridge for measurement of DC resistance. ''TDR'' adopts new advanced test current power supply technology, four terminal measurement, digital display of resistance value and test current. ''TDR'' is powered by 220V AC mains single phase supply. The measurements are accurate as the test current is highly stable. High automation is achieved with automatic discharge warning.Principle: The constant current generated is fed to the resistance under test through the current terminals and the voltage drop across the resistance under test is measured and displayed in ohms. A true four terminal measurement is used to eliminate the need for lead resistance compensation.
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Product
Zero Phase Current Transformer
MZL-45
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MULTI MEASURING INSTRUMENTS Co., Ltd.
Split-core type for measuring zero phase current
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Product
Turned Multiple Dipole Antenna
MODP2080
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Antenna for Radiation Immunity Test on Car Max. Input Power : 12kW & High Erectric Field at = 4 : 100V/m Contolable the Height/Deviation by own unique Stand Patent Information.
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Product
Auxiliary Current Transformers
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Osborne Auxiliary Current Transformers are often used to reduce system currents to lower values appropriate for instrumentation and/or protection circuits. The Aux CT’s are designed for specific current ratios and burden impedance with a known transformation error. Osborne’s units are built for high performance and longevity in the most demanding environments.
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Product
Harmonic Mitigation Transformer
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A specialized three-phase transformer designed to reduce harmonic distortion and voltage distortion caused by non-linear loads (e.g., computers, VFDs) in electrical distribution systems.
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Product
Transformer Capacity Tester
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Weshine Electric Manufacturing Co., Ltd
In many industries, including health care, manufacturing, electrical contracting, higher education and corrections, reliable, high-quality transformers are essential for keeping operations running efficiently. Large facilities and industrial processes require substantial amounts of power, and they need dependable transformers to convert the energy coming from the power plant into a form they can use for their equipment and building utilities.
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Product
Fourier Transform Infrared Spectroscopy (FTIR)
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Rocky Mountain Laboratories, Inc.
FTIR Analysis is used to analyze organic materials. Bulk and small particle materials can be analyzed. FTIR microscopy analysis allows for the identification of particle as small as 10 µm.
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Auto Transformers
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Variac Auto Transformers are continuously variable voltage auto transformer, having a movable carbon tip, fixed to a brush-arm sliding on a silver plated commutator. Rotation of the brush-arm by either manual or motor drive, delivers-an output voltage from zero to or above line voltage.
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Product
Loading Transformer
CL-6
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This readily portable Knopp Loading Transformer weighs only 60 pounds and measures 12″ long, 9″ wide, and 10″ high. Its sturdy enclosure provides protection and adequate ventilation. Two convenient carrying handles are provided. The insulating terminal panel is rigidly secured to the transformer frame, and heavy-current, bus-bar-type terminals are securely bolted to the panel. The two outpout terminals each have two connection surfaces, one on a vertical plane and one on a horizontal plane, for maximum convenience in connecting the heavy current leads and in changing, when necessary, the series-parallel links. The links and the output connections cannot interfere with each other. All terminals and connection links are plated
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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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Instrument Transformer Test Systems
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Our systems for testing voltage (VT) and current (CT) instrument transformers are conceived among other things for testing accuracy and insulation.
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Product
Precision Multirange Current Transformer
P-2000
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The Type P-2000-2 Knopp Precision Current Transformer is useful for high and low voltage work in the laboratory, shop and field for testing, measuring, and calibrating. The excellent accuracy and the One-to-One calibrating feature make it admirably suited as a standard for calibrating work.
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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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Instrument Transformer
CT & PT Test Equipment
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Measurements International Ltd.
Calibration of Voltage and Current Transformers from a Single Instrument, Calibration of Instrument Transformers with Different Rated Ratios Using One Single Reference Standard, Calibration of Voltage Transformers (VT) up to 800 kV When Used with MI 2500 Series of HV Dividers and Standard Capacitors, Calibration of Current Transformers (CT) Up to 10000 A When Used With MI 7020 and/or 7200 Series of Precision Current Transformers and/or Current Comparators, Test Frequency from 15 Hz to 100 Hz70.
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High Frequency Transformers
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Osborne High Frequency Current Transformers operate at frequencies higher than 50/60 Hertz. Their purpose is to reduce high frequency system currents to lower values that are appropriate for instrumentation and/or protection circuits. They have been designed to meet specified current ratios, and burden impedance at a specified transformation error. One area of unique Osborne expertise is in designing for phase shift when high frequency current transformers are to be used for power measuring applications.
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Product
Transformer Demagnetization Tester
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Weshine Electric Manufacturing Co., Ltd
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.
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Product
Automatic Instrument Transformer Test Set
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*ARM 9 processor controlled measurements*Measures total burden connected to test sample*Internal data storage facility upto 1 lakh readings*Digital display of test results on 800 x 480 TFT color display.*Latest IEC 61869 / ANSI C57.13-2008 / IS-2705 standards incorporated*VGA Port to interface with bigger display / monitor*Both Voltage & Current Transformer testing with one test set*5 and 1 Amp CT testing using either 5 or 1 Amp standard CT*Identifies ANSI, IEC, IS-P, IS-PR, BS, BS-S, IEC-S, IS, IS-S, AS, AS-M, AS-ME standards for CT & VT*USB memory storage*Available in three versions: AITTS Plus , ACTTS Plus & AVTTS Plus
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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
Manually Operated Transformer Oil Test Set
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We offer Manually operated Transformer Oil Testing Kits to check the DI-electric strength of the insulating Oils as per relevant specifications via. IS 6972. It is a useful equipment for transformer / switchgear manufacturing units. Oil frittering agencies, repair shop and electrical maintenance departments.
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Incremental Transformer Solutions
TRANSPORT X
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The Kelman TRANSPORT X is a compact portable Dissolved Gas Analysis (DGA) system which can be used to analyze oil samples for all dissolved fault gases and moisture. If abnormal levels are detected, it further provides a diagnostic using various IEEE/IEC approved interpretation rules.
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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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Control Transformers
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ENTES control transformers ensure the safe operation of measuring devices with 24 VAC supply voltage for electical control panels. Input voltages of Control transformers are either fixed (230 or 400V) or selectable with taps (400;230+15-15).
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Transformer Performance Tester
JYM
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JYM insulation resistance tester is used for on-site insulation resistance measurement. The instrument has built-in positive and negative bipolar high-voltage power supplies, with large output power and strong load capacity. It is suitable for insulation resistance measurement of samples with large capacitance, such as power transformers and cables.
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IEC Potential Transformer Burdens
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• Burdens for IEC specifications rated for various input voltages available • 2.5 to 207.5 VA at 0.8 PFIEC Potential Transformer Burdens
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Transforming Analog Circuit Breaker Testers
MAC-21
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The MAC-21 uses proven microprocessor and A/D converter technology to provide real-time waveform analysis. This ensures accurate true-RMS readings of current pulses, even with DC offset and distortion, which are typical in primary injection testing. Intelligent threshold algorithms provide accurate trip time measurement. Integration of measurement and control functions allow advanced features such as preset on times, auto ranging, and optional printer or computer interface.
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Product
1 Channel, MIL-STD-1553, Dual Redundant, Transformer Coupled, Assisted Mode Capable (AMC)
FTA
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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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Ethernet Transformers
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Pulse’s Ethernet transformers are RoHS compliant and qualified at major PHY suppliers. 100/1000/2.5G/5G/10GBASE-T Ethernet transformer modules are optimized for all major LAN transceivers. All modules provide electrical circuit isolation that meets IEEE 802.3, while maintaining signal integrity needed for the most demanding applications.
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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.
