Three Phase
Three voltage waveforms at 120°,1/3 of a cycle offset in time.
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Product
Dynamic Braking Resistors
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Speed of three phase asynchronous squirrel-cage motors and three phase synchronous motors are generally controlled by motor drives where frequency of the drive output determines the motor speed, and it can be adjusted without dependence on the voltage magnitude.
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Product
Three-Phase AC Power Sources
AC6900 Series
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Keysight’s AC6900 Series AC power sources provide a complete AC and DC power solution by combining the capabilities of a multimeter, harmonic analyzer, and power analyzer in one instrument. You can easily produce DC power, either alone or as a DC offset to an AC waveform, in a compact form factor.
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Product
Fault Passage Indicator for Lines
LineTroll R400D
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LineTroll R400D Fault Indicator indicates earth- and short-circuit faults and can distinguish between permanent and transient faults. The indicator has two sensors and use both the electrical field and the magnetical field to detect faults on all three phases.
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Product
Three-Phase Relay Tester
PTE-300-V
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The equipment compromises of three independent output channels than can be selected as voltage or current. This enables the unit to be used as a complete single-phase equipment (Voltage, Current, and phase angle between them), or with channels synchronized, as a three phase voltage or three phase current generator from a single phase mains input. The unit is extremely compact and rugged. The design incorporates the latest in modern digital microprocessor technology to achieve unbeatable output characteristics in terms of power, accuracy, low distortion, and dynamic capability.
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Product
Three Phase Protector
KPB1
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Konstar Electric Industrial Co., Ltd
If have one pase voltage is too high or two low or pahse lose or wrong phase sequence, the protector will cut off the power, and the new power supply, it will have 5s-300s to restart the equipment in order to protect them.Suitable for the engineer, and equipment and three phase equipment.
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Product
Instrument Transformers Tester
TE30
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Calmet Smart Calibration Devices
Electricity meters tester class 0.05 and 0.1. Three phase tester of current transformers and analyser of power network quality. It makes possible electricity meters testing on the site or in the laboratory.
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Product
High Power AOD Driver
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The Acousto-Optic Deflector (AOD) RF Driver is a three channel, three phase high power driver amplifier intended to drive devices such as the Harris H-902. The driver accepts a single low level RF input and produces three high power phase shifted outputs. The driver features adjustable gain, power monitoring, and programmable automatic protection features. The exceptional linearity and headroom allow the use of multi-tone and complex waveforms with minimal distortion.
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Product
LV Iron Core Line & Load Reactors
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Line and load reactors are generally serial-connected to the input and/or output terminals of three phase equipment such as motor speed controllers, inverters and UPS systems. These equipment make use of semiconductor switches such as IGBTs, thyristors, and diodes and therefore create harmonic distortion and high switching over-voltages (dv/dt). Use of such equipment has been becoming more widespread as the technology advances. However, the negative effects of these equipment should not be overlooked.
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Product
Transformers
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Chengdu Mengsheng Electronics Co., Ltd.
As a leading transformer manufacturer, DOREXS is committed to providing a variety of high-performance standard and customized transformers to meet the power needs of various industries.DOREXS has a professional R&D design team and advanced production technology to ensure that our transformers are at the forefront of the industry. At the same time, they are strictly produced in accordance with international standards to ensure that the performance and stability of each transformer are maximized.Our products cover dry type transformers, single phase transformers, three phase transformers, high frequency transformers, toroidal transformers, R core transformers, EI core transformers, isolation transformers and special transformers.If you need to know more about our products and services, please feel free to contact us.
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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
SCR CONTROLLER WITH REGULATOR
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The SCR Controller and the Regulator Board are used in SCR controlled power supplies.CEHCO offers single phase and three phase SCR Controllers with Regulator Boards.Click the links below for additional details.
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Product
Three Phase Protective Relay Test Equipment
TEST-330
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Beijing GFUVE Electronics Co.,Ltd.
Test-330 three phase protective relay test equipment is a three phase current output and five phase voltage output relay tester with embedded host machine equipped with Complex Programmable Logic Device.
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Product
Phase Detector/ Rotary Field Indicators
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Shanghai Beha Electronics Co., Ltd.
*The test instruments are built in compliance with the most recent safety regulations and ensure safe and reliable testing.*Display of all three phases via LCD-Segments*Display of phase rotation direction via LCD-Segments*Including measurement leads with safety Crocodile Clamps*with built-in fuses
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Product
Data Logger
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Our product range includes a wide range of Three Phase Energy Data Loggers (EVL-3.), Six Channel Temperature Logger, Three Phase GPRS Meter, Humidity Logger and Temperature Logger.
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Product
Advanced Line Protection System
ALPS
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ALPS is a multi-function digital protective relay system intended toprovide distance protection for HV or EHV transmission lines. It maybe applied on or adjacent to series compensated lines. It is availablefor single or three phase tripping applications. Typical operatingtimes are to 1 cycle.
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Product
AC Current Sensor
RCTi and RCTi 3ph
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The RCTi & RCTrms sensors convert ac current to an isolated 0-5V voltage or 4-20mA current loop. TA5V-5A allows compatibility with existing 1A or 5A CT metering circuits. Both offer a choice of proportional (rms) and instantaneous outputs. The available RCT current ranges are 0-100A to 0-50,000Apk. Both RCTi and RCTrms provide accurate measurement over a wide bandwidth ensuring precise measurement even with harmonically distorted wave shapes - using a flexible clip-on sensing coil. The RCTs are available as single and three phase models.
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Product
Power RC Snubbers
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Single phase and Three phase availableSuitable for AC and DC voltage applicationResistance and rate power of Resistor : 1 - 50W ( can be customized to 100W or above )Voltage: 63Vac, 125Vac, 280Vac, 480Vac, 500Vac, 600VacOperating temperature : -25~+85C / -40~+105CTesting Voltage : : 1.5 x Un 10sec ( can be customized )Varistor and Diode options available. Different applications can have very different electrical and mechanical profile requirements.Please feel free to send your application details for a suggestion and quotation.
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Product
Meter Test Board
MTB-3200
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Run standard meter accuracy tests and complex meter accuracy tests under widely varying loading conditions with TESCO’s Meter Test Board (MTB-3200). TESCO’s Three Phase Meter Test Board (MTB-3200) is an innovative meter accuracy test system offering unsurpassed functionality and ease of use. All of the features needed to test meters today and tomorrow are standard.
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Product
SCR CONTROLLED DC POWER SUPPLY
PS Series
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Variable DC power supplies are AC to DC power supplies with a variable DC output. The output can be varied with an SCR controller. The AC input power can be single phase or three phases. With single phase AC input, the DC output ripple is very high (50%). With three phase AC input, the DC output ripple is low (5%). This would be a key benefit for selecting three phase AC input instead of single phase.
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Product
Three Phase Prepaid Meter DTSY999
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Bofa Instrument & Equipment Co., Ltd
DTSY999 single phase is new age intelligent instrument, combination advanced integrated solid technology and SMT crafts. The performance accords with International Standards IEC1036 They feature advanced principle, simple construction, high accuracy and sensitivity, long service life, strong overload and anti-power theft, alarming of remainder, storing data over 20 years, setting secret, etc.
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Product
Programmable AC Power Source
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Chroma Systems Solutions, Inc.
The Chroma programmable AC power source 61500/61600 series are the right solutions to meet complex single and three phase requirements due to their ability to simulate AC line conditions and measure critical product characteristics during testing. These features make the 61500/61600 series ideal for commercial, power electronics, avionics, military, and regulation test applications from bench-top R/D design verification and quality assurance to mass production.
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Product
Three Phase Power Sources
PS3
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The PS3 three phase power source was designed to provide a stable alternating current and voltage source for three phase electricity meter test equipment.
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Product
Partial Discharge Tester
GTPD-4C
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GTPD-4C partial discharge comprehensive tester is the new generation of digital PD measurement and analysis instrument. The instrument has a strong ability of comprehensive analysis of partial discharge and detection of partial discharge in small signal and strong interference environment. With different accessories, it can measure and locate the partial discharge in any high voltage electrical equipment. It can realize testing the transformer partial discharge by applying the voltage on the three phases simultaneously.
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Product
Multifunctional Meter
AEM-DR
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Provide high accuracy measurement, display and remote communication of single phase & three phase parameters (V, A, P, Q, S, PF, Hz, Kwh). Multicircuit design and relay output modular expansion design decrease the overall cost and make the functionality more flexible. All monitored data is available via a RS485 serial , for the needs in energy management, alarming, and remote controlling. Embedded flash memory for Data-Logging can avoid any data missing once the communication is interrupted. Moreover, its ultra compact size DIN-rail mounting makes itself mountable in virtually any panel, enclosure or indoor Cabinet.
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Product
Three Phase Voltage Disturbance Recorder
PQR 2020
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The PQR 2020 is a Three Phase Voltage disturbance detector and recorder. This device is designed to be connected to a single phase 120V or 240V AC line or a Three Phase 208/240/480 Volt AC line and will monitor these lines for voltage disturbances.
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Product
Motor Diag & Protection
Phase Sequence and Motor Rotation Meter
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Phase Sequence and Motor Rotation meter detects live phase and sequence orientation of three phase power sources and industrial equipment conductors to ensure proper installation. Motor rotation function identifies rotational direction of industrial equipment such as motors, compressors and generators. Non-Contact Motor Rotation feature determines rotation of running single-phase and three-phase motors without the use of leads.
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Product
Regenerative Grid Simulator
61800
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Chroma Systems Solutions, Inc.
Power rating: Up to 300kVA, single or three phase outputOutput Voltage: 0~330V L-N / 0~570V L-L0~400V L-N / 0~692V L-L opt. without using a transformerOutput Frequency: DC, 30Hz~100HzMaximum power delivered down to 200VAC L-NFull 4 quadrant, fully regenerative up to 100% of output current ratingSpecifically designed for PV inverter, Smart Grid and EV related test applicationsProgrammable slew rate settings for voltage and frequencyProgrammable voltage and current limitsTurn on, turn off phase angle controlLIST, PULSE, STEP mode functions for testing Power Line Disturbance (PLD) simulationVoltage dips, short interruption and voltage variation simulationHarmonics, inter-harmonics waveform synthesizerComprehensive measurement capability, including current harmonicsAnalog programmable interfacesRemote interface: GPIB, RS-232, USB and EthernetParallel output for higher power applications (three phase only)
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Product
AC to DC Unregulated Power Supply
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CEHCO is a specialist in AC to DC Unregulated Power Supply. We can offer the followings:Input power can be single phase (1 PH) or three phase (3 PH)DC output voltage up to 1000 VDC maxDC output current up to 1500 Amps max
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Product
Stationary Meter Test Stations
Astel
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Calmet Smart Calibration Devices
Multi position single and three phase series meter test stations class up to 0.01% for simultaneous and automatic calibration and legalization of 32/64 electricity meters
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Product
Phase Angle Voltmeters
Phase Angle Voltmeter
Since the development of the first Phase Angle Voltmeter (PAV) over 50 years ago, North Atlantic Industries has been the industry leader in AC Measurement Instrumentation. Our name has become synonymous with innovation and quality. Our products, specifically designed for defense, industrial, and commercial applications, deliver industry-leading accuracy, repeatability, and reliability.NAI’s units of today are actually multifunction Digital Analyzing Voltmeters that combine a complete Voltmeter, a Phase Angle Voltmeter, and a Waveform Signal Analyzer in a single microprocessor-based instrument. With these versatile and flexible instruments, a wide range of tests can be performed, either manually using the front panel controls or automatically using the IEEE-488 bus. Designed for the Synchro/Resolver and LVDT/RVDT marketplace, NAI’s Voltmeters are used in a variety of applications.
