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Voltage Transformer
a type of intrument transformer enabling secondary connected metering.
- Pickering Interfaces Inc.
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PXI/PXIe High Voltage Multiplexer, Single 9-Channel, 1-Pole
42-321-104-HI
The 40-321-104-HI (PXI) and 42-321-104-HI (PXIe) are single 9-channel 1-pole high voltage multiplexers capable of hot or cold switching up to 1000 V peak. They are also available in a range of bank sizes with 1 or 2 poles and channel counts between 4 and 48. High quality reed relays are used throughout.
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Surge Voltage and Surge Current Testing Systems
HIGHVOLT Prüftechnik Dresden GmbH
Pulse Voltage Test Systems are used for surge testing on transformers, cables, gas insulated switchgear (GIS), arresters, and other high voltage equipment.
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MOTORIZED TRANSFORMER/RECTIFIER ASSEMBLY, 0-250 VDC, 200 A OUTPUT
18534PS1
Input power is 380 VAC, 3 PH, 50 Hz, P/N 18534PS1Output is 0 to 250 VDC, 200 Amp max.Variable Transformer is used to vary the output. SCR controller is not used, as it generates harmonics.Input control is 0 to 3.6 VDCIndoor enclosure, 50"H x 46"W x 36"DOutput voltage and current feedback as 4/20 mA for PLC interface.All input/output connections are inside the enclosure
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Inflatable High Voltage Testing Transformer
GTU-250KVA/500KV
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.Small and compact dimensions resulting in minimum space requirements. Light-wight components. Rugged construction to withstand long transportation stresses. Direct flanging to the test object. High safety for tester because of encapsulation of all HV parts. Large range of application in conjunction with HV bushing for withstand voltage test. Built-in HV measuring capacitor and coupling capacitor. Built-in HV disconnecting switch to separate multipath test object connector to ensure the safety of HV testing.
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Filament Transformers
Osborne designs and produces high impedance and unregulated Filament Transformers. An unregulated filament transformer supplies a specified voltage and current to the filament of an electron vacuum tube. High impedance filament transformers are designed around a tungsten tube filament. Osborne often works with our clients to increase the life-span of their vacuum tubes through the use of a regulated voltage supply.
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High Impedance Differential Module
HID
Use the HID module in conjunction with a high-speed overcurrent relay to provide three phase high impedance differential protection for substation busbars of any voltage level. Additionally, it can also be used to protect electrical machines like transformers, generators or motors against restricted ground faults.
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Extra-Ground Current Impuision Equipment
JYQ
Generally, the way of finding out the iron core ground false of powertransformer is always inefficient, while the method of using the traditional measure such as increase powerful current by welder when finding the false point oftransformer. The transformer needs to be mended on the spot or return to the factory if it can not melt off the point because of low voltage. It will spend high transportation fee and dealing costs, brings huge economic loss. The JYQ iron-coreimpulsionequipment is the intelligence set for exclusiveusing in solving the false of transformer. It can output high-voltage powerful current transientand melt the ground point off rapidly.
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Energy Saving Static Converter
The ENERGY SAVING static converter serves to generate a controlled squarewave single-phase alternate voltage (low frequency: 25 ÷ 125Hz) for industrial applications requiring high load power supplied by an external matching transformer. The power supply, sectioned by remote control switch and external fuses, is fed by a three-phase electric line via uncontrolled diode bridge and filtered by inductor and capacitor battery. The DC voltage thus obtained is converted into single-phase alternating voltage via “H”-shape bridge of semiconductors in order to control impressed frequency single-phase transformers.
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Programmable Micro-Ohmmeter
4300C
The 4300C is the perfect instrument for tackling ultra-low resistance testing requirements associated with motors, transformers, fuses, connectors, breakers, bonding/weld resistance, and many other applications. The 4300C Digital Micro-Ohmmeter measures a variety of low-resistance devices ranging in value from 100nΩ to 20kΩ. The flexible measurement format of the 4300C provides six ranges of user selectable test current (from 0.1mA to 10A) and three voltage sensitivity settings (20mV, 200mV, and 2V).
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Test Sets For Diagnostic Testing
Test Sets For Diagnostic Testing are designed to test Oil Resistivity, Tan Delta, High Voltage Surge Comparison, etc. These test sets are automated instruments used to measure electrical features to insulate transformer oil, liquids and varied other insulating materials. They are ideal for revealing different localized problems and varied weak spots in the insulation. These modern testing sets are designed to provide high accuracy in results. In addition to this, they are easy to maintain testing sets available to ensure accurate readings.
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Test Equipment for Instrument Transformer
is desirable for measuring ratio errors and phase angles of low current (voltage) transformers used in electric devices, such as watt hour meters, smart meters, digital current meters, and transducers, etc.
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Transformer Testing
Haomai Electric Power Automation Co.,Ltd.
1)Test Standard:IEC60076 & IEEE C57.12.90 2)Voltage ratio measurement of transformer 3)Turns ratio measurement of transformer 4)Group vector measurement of transformer
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High Frequency Current Transformer
HFCT Ø 140mm
Techimp Clamp High Frequency Current Transformer model 140 is an inductive sensor for partial discharge measurements. It is suitable for online /off line PD tests on : large diameter cables ; grounding rod bar ; etc. A TNC termination is available to connect the Clamp HFCT 140 to the TechImp PD analyzer : PDCheck , PDBase etc. The arrow indicates the requested input current (Iin) direction to get coherent output voltage (Vout) polarity respect to ground. When the sensor is installed with the arrow directed to ground, the detected voltage signal (Vout) has the same phase of the input current (Iin).
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Instrument Transformer Test Systems
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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Adjustable Isolating Transformers
PeakTech Prüf- und Messtechnik GmbH
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.
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Standard Voltage Transformer
HJ / 635
Wuhan Huatian Electric Power Automation Co., Ltd.
It is mainly designed for the voltage transformer calibration standard of basic power supply and production department.
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Instrument Transformer
Our company has achieved a reputed niche in international market by manufacturing and exporting a great range of Instrument Transformer. Widely used in electrical, power generation and engineering sector for transforming voltage or current level, this equipment is in accordance with industry standards. Manufactured using excellent grade raw materials sourced from reputed vendor, Instrument Transformer is offered to clients in different technical specifications. We stringently test this instrument on varied standard parameters.
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Analog Power Supply
Type NPS-2412
National RF's Type NPS-2412 analog power supply was designed to be used in communication equipment where radiated switching inverter noise from conventional “switching type” supplies is not acceptable. The power supply consists of a standard rectified transformer output driving a pair of voltage regulators and filtering networks. The 2412 offers an adjustable voltage output between 2 and 24 volts as well as a fixed voltage output of 12 volts. A maximum of 20 Watts of DC power can be supplied from the unit. As the voltage regulators dissipate power in the regulation process, the power to the load is derated accordingly, dependent on the set voltage to the load. The adjustable regulator is a standard LM-317T integrated circuit device. The fixed regulator is a standard LM 7812 device. Upon customer request, the LM 7812 device may be changed to any voltage rating within the the LM-78xx series of regulators. Contact National RF for this modification if desired.
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1μΩ-4kΩ AC Milliohmmeter Low Resistance Tester
TH2521
Shenzhen Chuangxin Instruments Co., Ltd.
TH2521 AC Milliohmmeter is a high-performance and intelligent tester widely used to test contact resistance, internal resistance and battery voltage. The application of constant current source with 1kHz frequency can greatly eliminate the potential error caused by thermoelectricity on DUT. This meter has the function to automatically detect contact failures on test cable. At the range of 30mΩ, basic R resolution can reach 1μΩ. It is applicable for transformer, inductance coil copper resistance, relay contact resistance, switch, connector contact resistance, wire resistance, PCB line and via reistance dan metal defect detection, etc. In the mean time, signals, such as HIGH, LOW, PASS, can be output through HANDLER interface, thus it is very convenient to be used in automatic production line.
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Current Booster
PHPC01
PHPC01 current booster is an accessory which can work together with protection relay test kit to test transformer protection relay testing. It is specifically designed to supply high compliance voltage even at small current range.
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PXIe-4340, PXI Displacement Input Module
785068-01
The PXI Displacement Input Module supports 4-, 5-, and 6-wire AC linear variable differential transformer (LVDT) and AC rotary variable differential transformer (RVDT) measurements. The module simultaneously samples each analog input and sets the excitation frequency and voltage for each channel independently. You can set different timing, triggering, and sampling modes for each channel independently. Diagnostic features include self-calibration, overcurrent detection, and open coil detection.The PXI Displacement Input Module includes the NI-DAQmx driver and configuration utility that simplify configuration and measurements. NI-DAQmx supports NI programming environments as well as Python, ANSI C, C#.NET, and MathWorks MATLAB® software.
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High-Voltage Test Device
PGK 150 HB
BAUR Prüf- und Messtechnik GmbH
Cable testing and diagnostics with the BAUR PGK HB. There are hardly any other longer-lasting, more robust and cost-effective testing devices than the two-piece high-voltage test devices from the PGK HB series. They generate continuous adjustable test voltages with mains frequency or optionally DC with positive or negative polarity. The display instruments for current and voltage, the safety control unit and the regulating transformer for the voltage are integrated in the operating unit.* Operation as DC or AC testing device* Polarity of the DC voltage can easily be reversed* Robust and durable
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High Voltage Transformer
RR manufactures HIGH VOLTAGE TRANSFORMERS for various Industrial Applications.
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Primary Injection Test Set
PI-6000
The PI-6000 is a rugged & durable primary injection test set capable of testing circuit breakers up to 6,000 amperes frame size. It incorporates an output transformer with dual primaries to facilitate its use on power sources of 480 VAC as well as 208-240 VAC. The unit also includes dual secondaries to provide optimal impedance matching to a wide range of circuit breaker sizes. An internal voltage sensor automatically configures the AC control power section to be energized only when properly configured for the applied voltage.
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AC Test Transformer
Yangzhou Power Electric Co., Ltd
The AC test transformer are especially designed for testing high voltage products and components, such as cables, power transformers, gas-insulated switchgears, bushings and arresters. It is also suitable to test insulation materials. They are used to generate testing high voltage and function as part of the complete system. These systems are particularly suited for tests requiring stable voltage even if the load changes under voltage (corona, wet & pollution tests) or when the load is inductive (inductive voltage transformers).
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Contact Resistance Tester
JYL-200B/100B
Product description: JYL-200B/100B contact resistance tester can measure contact resistance of high voltage switches and circuit breakeres, also can test primar side resistance of transformer and grounding wire in groups
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Automatic Three Phase Transformer Ratio Meter
ATRM PLUS
*Fully Automatic measurement.*Wide selection of Excitation Voltages of 10V, 40V, 100V, 230V & 250V from front panel.*4V Excitation voltage provided for CT measurements*Ratio range of up to 5000; direct display of measured ratio.*No conversions required.*Automatic Jumper selecting as per the vector*Diagram of Transformer.*Automatic testing of all 3 phases in 3 phase transformers*Without manual intervention.*Displays % deviation from a nominal ratio.*External storage facility using pen drive.*Internal storage up to 10000 readings.*Touch screen 7” Color TFT display with backlighting with*Resolution of 800 X 480.*Tap changer facility.*Computer interface using RS-232 or USB.*Windows Interface software provided for data transfer.*USB printer interface.*Four terminal measurements to reduce errors due to*Winding and lead resistance.*Auto print and storage facility.Fast measurements.
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Highly Inductive Resistance Meter
MR 8050
With the MR 8050 resistances highly inductive Resistance Meters windings of transformers, motors and reactors can be measured. (range 100 µΩ with 0.01µΩ resolution up to 6 kΩ). The performance of the test objects can be up to 800 MVA or even more. The magnetic loading of a transformer is performed quickly using a high loading voltage (60V). This is important for time critical measurements (cooling curves). The unloading of the transformers core is very fast, very safe, as the energy is total destroyed in the MR 8050.
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LVDT Sensor Amplifiers
Analog Devices signal conditioning ICs, together with linear variable differential transformers (LVDTs), can be used to convert mechanical position to a dc voltage. The IC provides both the excitation for the LVDT and the output conversion to dc level with a user selectable gain. ADI LVDT signal conditioners are available to interface with a wide range of LVDTs, including half bridge and standard 4- and 5-wire.
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Turns Ratio Testers
TRT Standard Series
When it comes to choosing a transformer turns ratio tester, TRT Standard series offers some of the most advanced instruments with LCD display out in the market. Each model measures transformer excitation current and phase shift performs automatic vector group detection and magnetic balance on three-phase transformers and three-phase autotransformers. Furthermore, they have a built-in true three-phase power source. Because of that, TRT Standard instruments can test transformers with special configurations, such as phase-shifting, rectifier, arc-furnace, traction transformers, etc.The instruments can output test voltages from 1 V AC to 250 V AC, depending on the chosen model. High test voltage of 250 V AC provides more accurate turns ratio testing compared to other turns ratio testers on the market and extremely low test voltage of 1 V AC enables turns ratio verification of current transformers.TRT Standard series consists of:TRT03 Models (TRT03A, TRT03B, TRT03C) – single-phase voltage up to 100 VTRT3x Models (TRT30A, TRT30B, TRT30C, TRT33A, TRT33B, TRT33C) – single and true three-phase voltage up to 100 VTRT63 Models (TRT63A, TRT63B, TRT63C) – single and true three-phase voltage up to 250 VMore about models differences can be found under the downloads tab, in brochures and comparison sheets.A user can create test templates using the DV Win software and store them in the PC’s memory for later use when in the field.TRT Standard series models have a built-in tap changer control unit. Consequently, it enables remote control of an on-load tap changer (OLTC) directly from the tester. In order to make the most out of this feature, the DV-Win software can be programmed to do everything automatically – running turns ratio tests, changing OLTC tap positions and saving results. This option, especially in combination with test templates, significantly facilitates and shortens the turns ratio testing time.
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Isolated Gate Drivers
Analog Devices’ isolated gate driver portfolio offers designers performance and reliability advantages over designs utilizing optocouplers or pulse transformers. Utilizing ADI’s proven iCoupler® technology, the isolated gate driver family offers the advantage of a maximum propagation delay of 50 ns, less than 5 ns channel-to-channel matching, a 50-year lifetime for 400 V rms working voltage and galvanic isolation in a single package.
