Three Phase
Three voltage waveforms at 120°,1/3 of a cycle offset in time.
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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
Transformer Turns Ratio Meter
TTRM 301
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SCOPE introduces state of the art precision three 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. Along with turns ratio, this light weight and reliable instrument measures ratio deviation, phase angle deviation, magnetizing current and detects tap-position of single as well as three phase transformers in charged switchyard condition. The instrument has facility to automatically detect vector group of all majority configurations available. The differant AC voltage selection offers high accuracy in measurement.
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Product
Pole Mounted Detector of PtG and PtP faults in 6-69V Line
LineTroll 111K
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The unit mounts 3-5m below the conductors and monitors all three phases. The indicator is powered by replaceable long-life lithium batteries which have a lifeexpectancy of 10-15 years. It provides a 360 degree visibility for indication both for transient faults and permanent faults.
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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
Test Setup For Air Conditioner
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SCR ELEKTRONIKS have developed TESTING SET UP FOR SINGLE PHASE / THREE PHASE MOTOR for carrying out Performance Test, Earth Contact Resistance Test, High Voltage Test, Megger Test and Leakage Current Test. It consists of Voltmeters, Ammeters and Wattmeters for observing the values of different parameters. OK / NOT OK lamps are also provided to display the results of Earth Contact Resistance Test, HV test, Megger Test, Leakage Current Test. All tests are provided with tripping cut off concept.
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Product
Power Phase Converter Single phase 220VAC to 3 phase 380VAC Converter
SDT-40KW
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Zhejiang Sandi Electric Co., Ltd
SANDI SDT series single-phase to three-phase converter, adopted SVPWM modulation control technology, which can convert ordinary single-phase power to industrial three-phase power. After through SDT series single-phase to three phase converter power conversion, the three-phase power output is standard pure sine wave, the harmonic distortion rate (THD) is less than 2%, totally meet the national standards of three-phase power quality, applicable to all types of load.
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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
Turns Ratio Meter 1 Phase
TR-1 / TR-1P
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Raytech Single Phase Transformer Turns Ratio Meter TR-1/P was designed to be a rugged and reliable automatic transformer Ratiometer. This system has a high degree of accuracy and will test ratios to 4000:1. The design of this test system is based upon the popular Raytech Automatic Three Phase test set: TR-Mark III.
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Product
Multifunctional Meter
CPM-10
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CPM-10 Multifunction Power meter measure single phase 2 wire ,single phase 3 wire, three phase 3 Wire and 3 Phase 4 wire systems with high accuracy measurement for parameters such as voltage, current ,active power, reactive power, apparent power, power factor ,frequency, effective energy (V,A,W,Watt-Hr,Var,Var-Hr,VA,PF,Hz), having LED display and standard communication RTU Modbus RS485..Optional functions 1 set relay output,1 analogue,1 RS485 (ModbusRTU Mode) or 1 pulse output. Most suitable for power management,remote input /output, alarm and remote signal control uses needs.Case depth 120mm only, easy panel mounting installation
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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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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
903 Benchtop Three Phase 40A
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Weshine Electric Manufacturing Co., Ltd
1. The instrument has standard four phase voltage and three-phase current output. It can test not only various traditional relays and protection devices, but also various modern microcomputer protections, especially for transformer differential protection and standby automatic switching device. The test is more convenient and perfect.2. Classic Windows XP operation interface, friendly man-machine interface, easy and fast operation; high performance embedded industrial control computer and 8.4 inch resolution 800 × 600 TFT true color display screen, can provide rich and intuitive information, including the current working state of the equipment and various help information.
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Product
Variable Transformer DC Power Supplies
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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 a Variable Transformer (also known as variac). The Variable Transformer can be adjusted manually or with a motorized control. 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
AC Source
AFC
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The AFC Series products are single and three phase AC Power sources ranging from 0.5kVA to 2000kVA. This AFC series has a continuous and adjustable output voltage between 5~300V. This allows for quick and convenient 3 scales of preset voltage for high and low voltage simulation. Power is supplied by state-of-the-art IBGT pulse width-modulated power amplifiers resulting in highly efficient power conversion, compact design and maximized performance. With up to 90% efficiency the AFC minimizes heat dissipation so less infrastructure cooling is required.
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Product
High Performance Power Analyzer
AFM-8A
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AFM-8A has Developed for AFC*(Auto Frequency Control) high performance measurement and frequency update, its update up quickeer than 100mSec. multifunction power analyzer provides high-accuracy measurement and is designed for single phase and three phase application. It includes 4 Digital inputs, 4 Relay outputs, and a RS-485 Modbus RTU Communication port. The user can choose one more communication port, and 2 Analog outputs for output expansion.It provides measure voltage and current of the 2~63 harmonic, and it shows CO2 emissions, which is suitable for power monitoring, management and analyze power quality. It has TOU (time-of-use) function and 4MB Flash memory capacity, allowing users to record data for a long time. It also has a software line adjustment function to reduce the on-site line adjustment work.It has the functions of waveform capture and recording, power record, and event record, which can be used for multifunction power analyzer.
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Product
Portable Three Phase Phantom Load Power Source
SY2103
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Hong Kong Songyang Industrial Ltd.
The new SY2103 series portable three phase phantom load stable power source, designed from new digital wave compound technology and according to International Standard, is newly intelligent equipment for energy meters. The equipment includes voltage/current source & standard meter, operated easily through front panel to preset directly all data of meter under test and test process.
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Product
Three-Phase AC Power Source 320 Vrms, 12 KVA, 550 Hz
AC6912L
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Keysight’s AC6900 Series three-phase 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.
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Product
AC Power Calibrator
LS3300
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The LS3300 is an AC signal generator capable of outputting both current and voltage simultaneously, thus allowing it to calibrate power meters. Providing output ranges of 10mV-1250V, and 0.3 mA to 62.5 A, and upto 78.125 kW, the unit is capable of calibrating up to 0.15 % Class Power meters. New features on the LS3300 include a high definition LCD display, a vector diagram, and the ability to synchronize up to three units to emulate anything from single phase two wire to three phase four wire systems.
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Product
Three Phase Din-rail Multi-rate kWh Meter
SY 1041
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Hong Kong Songyang Industrial Ltd.
Type SY1041 three phase DIN rail watt-hour meter is a kind of new style three phase electronic multi-rate watt-hour meter, energy data display adopt 7 digits wide temperature type crystal display, with many functions of multi-rate (time-of use) energy measurement, infrared carrier wave communication and RS485 serial port communication reading meter, etc
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Product
Transformer Ratio Meters
TRM-200
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Three phase lead switching network • Excitation current meter Accessories: Range Extender 1:5.
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Product
Three-Phase AC Power Source 320 Vrms, 3 KVA, 550 Hz
AC6903L
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Keysight’s AC6900 Series three-phase power source provides a complete AC and DC power solution by combining the capabilities of a multimeter, harmonic analyzer, and power analyzer in one instrument.
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Product
Three Phase Round Energy Meter Test Bench Type KP-S3000-C
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Bofa Instrument & Equipment Co., Ltd
Three phase Round energy meter test bench Type KP-S3000-C is designed for testing three-phase round energy meters (ANSI Socket type), it is mainly exported to countries in Noth America and South America. It is an ideal testing eqiupint for energy meter factory or R&D institute. All the testing procedures can be automatically operated by PC or by Keyboard manually.
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Product
Three-Phase AC Power Source 320 Vrms, 18 KVA, 550 Hz
AC6918L
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Keysight’s AC6900 Series three-phase 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.
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Product
Transformer Ratio Meters
Three Phase Transformer Ratio Meter Standard Series
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TRT is based on state-of-the-art technology, using the most advanced technique available today. The test equipment can be used to test both single-phase and three-phase transformers, both with and without tap changer in accordance with the requirements of IEC 60076-1.
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Product
Digital Line Protection System
DLPD
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The DLPD provides distance protection for HV and EHV transmission lines. It may be used for single or three phase tripping applications. It includes four zones of distanceprotection. User selectable pilot schemes are provided with stepdistance backup. Ground instantaneous and time overcurrentfunctions are independently selectable to be directional ornon-directional.
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Product
Three Phase Multi-Function Meter Type DTSD999
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Bofa Instrument & Equipment Co., Ltd
Measure total active energy、total reactive energy、forward active& reactive energy、 reverse active & reactive energy and total four quadrants reactive energy and time of sharing energy
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Product
Test Equipment
Rotary Field Checker
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Smart Three Phase Rotation Tester. Test Leads. Phase Rotate Tester is a 3 phase tester to identify the correct connection from the power supply. Also, it can identify the missing phase of the power supply too.
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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
Flexible Rope-Type Current Probe
RCT1A and RCT5A
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These probes have great bandwidth ensuring accurate measurement even with harmonically distorted wave shapes. For all RCT1A/RCT models, a NIST, NAVLAP, NPL (UKAS) factory traceable calibration certificate and certificate of conformance is supplied. UL/CSA approved materials are used throughout. Three phase and single phase flexible AC current sensors (rope sensors) are available for fast installation in confined spaces, eliminating the need for Electrical Supply Shutdown. Available outputs are 1A @ 2.5VA and 5A @ 0.5VA, this means long cable lengths from current sensor to signal conditioner allow these low VA ratings to be used, even when feeder cable to energy meter distances are large (up to 98 feet / 30 meters)
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Product
Transformer Rectifier Assemblies
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Transformer rectifier assemblies are very useful in OEM applications when unregulated DC output is required. Input power can be single-phase or three phases. With single-phase input power, the output ripple is 50%. With three-phase input power, the output ripple is 5%. A 5% output ripple is a clear advantage. Hence, transformer rectifier assemblies with three-phase input power are more popular. Circuit breakers, fuses, voltmeters, and ammeters can be added per customer requirements. The assemblies can be an open frame or inside an indoor enclosure.
