Voltage Transformer
a type of intrument transformer enabling secondary connected metering.
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Transformer DC Winding Resistance Tester
HTZZ-5A / 230
Wuhan Huatian Electric Power Automation Co., Ltd.
Applicable for transformer to submit the dc resistance testproject around group in pick up and overhaul project.
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High Voltage Power Supplies
High voltage SCR controlled power supplies require the following:Output voltage is high. Output current is generally Low.Voltmeter and ammeter display the output voltage and current under load.Potentiometers are used to adjust output voltage and limit output current from minimum to maximum.
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High Voltage Meter
STME-VM
Statclean Technology (S) Pte Ltd
This is a High Input Impedance Voltmeter with 70 Gigohm input impedance. Capable of measuring up to DC voltage up to +/-5.5kV with 1.0V resolution over a range of himidity and temperature, the meter measures with better than 1% accuracy without loading the power source. Its compact size and light weight body allows applications in laboratory and field work when powered by battery.
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Multiple Gas Transformer DGA
MULTITRANS
The MULTITRANS is an 8-gas on-line transformer DGA monitoring unit designed to monitor a bank of three single-phase transformers in close proximity. Based on the same core technology as the highly successful TRANSFIX the MULTITRANS measures all significant fault gases (in ppm) as outlined by international standards as well as moisture in oil (%RH & ppm).
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Surge Voltage Generator
SSG 1100
BAUR Prüf- und Messtechnik GmbH
Cable fault location with the BAUR SSG 1100. Surge voltage generators are used for pre-location and pinpointing of high- and low-resistive as well as intermittent faults in power cables. The energy stored in a high-voltage capacitor is released at regular intervals or as DC voltage. The thus generated acoustic signal at the fault position can be recorded with a ground microphone and a universal receiver.* High surge voltage up to 32 kV* Continuously adjustable voltage* Voltage monitoring through kV meters with 3 measuring ranges* Automatic discharge unit
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Transformer Turns Ratio Meter
TTRM 101
SCOPE introduces state of the art precision single phase Transformer Turns Ratio Meter (TTRM ) designed for field testing as well as factory testing of power transformers, instrument transformers and distribution transformers of all types. TTRM 101 measures only turns ratio where as TTRM 102 along with turns ratio, measures ratio deviation, phase angle deviation, magnetizing current and detects tap-position of single phase transformer in charged switchyard condition. The range of AC voltage selection offers high accuracy in measurement.Both the instrument have in-built TFT display with touch screen and thermal printer. The user friendly, simple instrument makes the testing more easy. With the touch keypad it is possible to enter required DUT information.The ratio results are displayed with % error. Internal non-volatile memory gives the provision of storing test results.Further data can be downloaded to PC or copied to memory stick through USB port provided.
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Voltage Control Attenuator
RF Lambda’s voltage control attenuators allow for precision control of RF signals. With a voltage variable control pin the signal can be fine-tuned as needed by the system. These attenuators offer fast response time and wide band operation. Hermetically sealed options are available upon request.
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Transformer Winding Resistance Meters
TWA Standard Series
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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Voltage Dips and Interruptions Generator
CSS61000-11
The voltage dip and interruptions generator is specially designed according to the characteristics and requirements of EMS measurement under a sudden reduction or interruption of the voltage at a point, CSS61000-11/ CSS61000-11T used a big LCD in both English and Chinese operating interface. They have more fine performance such as high reliability, convenient operation, and full meet the standard requirements of IEC 61000-4-11, EN 61000-4-11 and GB/T17626.11
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FTIR – Fourier Transform Infrared
FTIR stands for Fourier Transform Infrared spectroscopy. It is a powerful gas measurement technology for simultaneous measurements of multiple gases. The ability to detect and measure almost any gas, combined with the robustness and reliability of the technology, makes FTIR ideal for a wide variety of applications.
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Voltage Recorders
Voltage Optimisation & Voltage Stablisation have become popular; the Electrocorder range of single & three phase Voltage portable Recorders are extensively used in this area as well as supply voltage analysis.
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Transformer Tester
MOTOMEA Distribution Transformer Test Systems: Routine Testing for Production (EOL) and Quality Assurance (QA). Type Testing at Laboratory (R&D)
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Potential Transformers
Osborne Potential Transformers (PT’s) are used to reduce higher system voltages 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 potential transformers are to be used for power measuring applications.
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Model DG-9 (Universal Voltage)
DA8-G9-UNIV
Designed for semi-solids; powdered, granular or textile materials; and pliable sheets in rolls or stacks. Optional needle electrodes and sensitivity modules which allow for a wide range of moisture measurements. Rechargeable NiMH batteries save hassle and money of battery replacement.
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Safety Voltage Detector
289 SVD
Standard Electric Works Co., Ltd
● Bright LED visual indication● Audible indication● Mute function● AC voltage detection: 100Vac ~ 69kVac● Frequency range: 50/60Hz● Easy-to-prove method● Self-test function● Power source: 1.5V(AA) alkaline battery × 3● Non-contact detection by proximity● Personal sensor, easy to wear and convenient to use● Can be attached with hot sticks by optional accessory● Lightweight, robust and compact● Easy access to batteries Comply with EN 61326-1
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Voltage Continuity Testers
Built tough for use in industrial and commercial environments, measures voltage range up to 1000 V AC and 1200 V DC (2100-Gamma only). Designed with reinforced components for dependable performance.
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Transformer Winding Resistance Tester
KRI 9310
KRI 9310 adopt Kelvin four-wire testing method, which effectively eliminates the influence of the resistance of the test line on the test results. It can be able to increases the current to 10A by which can test extremely low resistance to 0.01 Ω(such as amorphous alloy, Copper-nickel, nickel-chromium-iron, iron-chromium-aluminum etc). For the tested objects with high resistance value (CT/PT), the instrument can extend the range to 20 kΩ，so the wide resistance test range enables KRI9310 can cover 80% of the power transformer products on the market and switchgear bus-bar cable etc. The power of the tester use the built-in rechargeable lithium battery that can test hundreds of transformers by one time charging.
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High Voltage Differential Probes
A high voltage differential probe is used for measuring the voltage difference between two test points where neither test point is at ground. High voltage differential probes from Tektronix can be used for signals up to 6000 V. These probes are the best choice for making non-ground referenced, floating or isolated measurements in large part due to their common mode rejection capability. These products are designed, manufactured, and serviced by Tektronix.
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High Voltage Probe
HVP-40DM
*DC 40KV CAT II Pollution 2.*2000MΩ Impedance.*3999 LCD display.*Accuracy 1.0% full range.*T.C. 100 ppm/oC*400V/4KV/40KV, 3 range.*Resolution 0.1V/1V/10V.*PEAK HOLD, Auto power off.*CE, TUV GS, UL, CUL, IEC1010
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Voltage Detectors
Available with a digital readout or a simplified LED display Seaward's specialist range of voltage detectors have the versatility and durability to cope with all types of user demands.
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Three-Phase Transformer Demagnetizer
DEM60C
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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Current Transformers
The Current Transformer (CT) is the sensor which measures the amount of current draw from the wire it is installed on.
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High and Low Voltage Detector
279 HD
Standard Electric Works Co., Ltd
● Compact and light weight● Self-test function● Voltage detection: 80V~11.4kV AC● Auto power off (5 minutes)● Waterproof: IP66● Identify Line (Phase) and Neutral
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Direct Winding Transformer Monitors
Real time comparison of calculated and direct winding temperatures
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Voltage Controlled Oscillators
a High Reliability Low Noise Voltage Controlled Oscillator (VCO) which covers a 10 MHz to 20 MHzfrequency band with a voltage tuning range from 0V to 20V. This design features exceptional phase noise performance of -120dBc/Hz @ 10 kHz offset. Supply Voltage is +15V with a generated output power level of +10 dBm and 2nd harmonic output of-11 dBc typical. The assembly is RoHs compliant and available in a compact 0.5 inch SMT package with an industry standardmounting footprint. The bottom surface is copper clad with 2-5 micro inches of immersion Gold over 150 - 250 micro inchesof Electro less Nickel which makes it resistant to oxidation for ease of soldering. The VCO operates over a temperature rangeof -40°C to +85°C and is designed to meet a variety of MIL-STD-202 test conditions including Humidity, Shock, and Vibration.
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High Voltage Standard
HVS
The HVS uses precision matched resistors for high accuracy; it is a modified Park divider structure.
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Electronic Transformer Test System
UI2000-ET
• Input characteristics analysis 1) Measure Vrms (10-300V) Lrms (0.04-4A) W, PF, Hz, total harmonic and 0-50 component of harmonic 2) Accuracy: ± (0.4%reading + 0.1%range + 1digit) • Output characteristics analysis 1) Measure lamp voltage (1-60V) lamp current (03-20A) lamp power, crest factor and oscillatory frequency 2) Accuracy: Class 2 • It can print without compute, and provide the communication port for PC
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Process / Voltage / Current
Calibrator high precision process signals able to measure and generate current and voltage.
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Transformer Rated Metering Site Training Bench
Model 8833
The PowerMaster® 8813 is a true 3-phase training simulator for metering technicians to help improve their troubleshooting skills for applications encountered in the field. The Model 8813 provides a safe, controlled environment to help the trainee accelerate their education in meter testing and wiring verification. The training simulator also features the ability to simulate over 28 commonly found metering errors in the field. Paired with the Training Administrator Station (TAS), the bench can be controlled remotely over a closed WIFI network, and each trainee’s performance is recorded and time stamped for every session.
