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Transformer Rectifier Assemblies
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.
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Current Transformer Testers
Vanguard Instruments Company, Inc.
Performs CT excitation, current-ratio, polarity, and phase angle testsMeasures insulation resistance and winding resistance of the CT seconday windingsMeasures the CT's secondary burdenTest record header information including company, substation name, circuit ID, manufacturer, CT serial number, operator name, and test record-commentsBuilt-in 4.5-inch wide thermal printerPlot Multiple Saturation CurvesStores up to 128 CT test plans and 140 test records internallyUSB, Bluetooth, and USB Flash drive interface
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Solid State Voltage Injector
J2110A
While it is possible to obtain high quality injection transformers with bandwidths as wide as 1Hz to 5MHz or more, in some cases this is still insufficient for some tests. For example a typical heater control loop might have a bandwidth of less than 1Hz while some linear regulators and opamp circuits can have bandwidths of up to 100MHz or in some cases even higher. For these applications, a solid state injector can provide the necessary bandwidth. A solid state injector can perform at DC, while the upper frequency limit is dictated by the components selected and the printed circuit board material and layout. It is possible to obtain a solid state injector with a working range of DC – 200MHz, though above 50MHz the interconnection between the injector and the circuit being tested can become quite critical. It is essential that ripple from the injector power supply does not dramatically degrade the dynamic range or the signal to noise ratio of the measurement. The resulting plots are often much cleaner when using a solid state injector than with a transformer injector.
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Transformer Insulation Testing
The primary test methods used to assess the condition of the active insulation components in transformers and bushings, on site, include:1) power factor/tan δ,2) variable frequency power factor/tan δ (1 - 500 Hz)3) dielectric frequency response (DFR) [a dielectric response method], and4) moisture in oil measurements (for transformers).
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Mini Degasifier
AE865C
This lightweight cart mounted Mini-Degasser uses the latest high vacuum technology for filtering, dewatering and degassing of insulating and dielectric fluids. The equipment is ideal for processing oil in transformers and other similar locations.
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High Resistance Neutral Grounding Devices
HRG systems limit the fault current by placing high resistance between neutral point of transformer (or generator) and ground. As it is not possible to locate the fault point in delta connected systems, an artificial neutral point is created and delta connected system can be grounded. This allows a fault current of a few amperes thus locating the fault point gets easy. When the neutral point is grounded thru high resistance, both continuity of operation is provided during fault condition and sufficient current (typically between 2 A and 10 A) flow is provided for ease of locating the fault point.
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Three-Phase Test System
TESTRANO 600
TESTRANO 600 is the world’s first portable, three-phase test system which supports all common electrical tests on single- and three-phase power and distribution transformers for routine and diagnostic testing on-site or during factory acceptance tests (FAT).
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Oil Dissipation Factor Tester
MG-III
Chongqing Kailian Yongrun Industrial Co.,Ltd.
It is designed to determine the dissipation factor (Tan Delta), capacitance and resistance of transformer oil and other liquids. Relative dielectric constant and volume resistivity are calculated automatically and displayed.
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Automatic Oil Tan Delta & Resistivity Kit
MOTR
The Motwane Manufacturing Company
Motwane's MOTR is multifunctional automatic test kit designed for accurate measurement of the Dielectric Constant, TanDelta, Resistivity & capacitance of transformer oil & other electrical insulating liquids. It has preprogrammed test sequences as per various International standards along with customized test sequences as per user requirements. Internal memory for 250 tests provided with PC interface & report generation facility. Inbuilt thermal printer for onsite results. Test cell is designed as per IEC247 with calibrator for onsite calibration of kit.
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COMPUTERIZED LCRTZ TEST SYSTEM (Automatic Transformer Test System)
CVCT-S20
Ideal for fast and fool proof testing of COILS AND SMALL TRANSFORMERS like SMPS transformers, Telecom transformers (HYBRID, POT CORE, RM-CORE), Pulse transformers etc. The systems scans at one stroke, all the windings of a transformer and tests as per definition of test procedure. The test procedure can be pre-programmed and stored under User friendly menu driven software . Any semi-skilled and unskilled person can be engaged for actual testing purpose. Can Select test frequency, pin number, parameters, test conditions, limits for each test. Test any pin to any other pin any defined parameter.Test Parameters :-> Inductance-> Capacitance-> AC Resistance, -> DC Resistance, -> Impedance, -> Leakage Inductance,-> Transformation Ratio & Winding PolaritySPECIFICATIONS :Measurement Frequencies : 50 Hz, 100 Hz, 500 Hz, 800 Hz; 1 KHz, 2 KHz, 5 KHz, 10 KHz. Measurement Voltage: 0.1 V – 1.0 V RMS adjustable under program control.
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Current Transformer
CBT4
Shanghai Powoo Industry Develop Group Limited
- Completely enclosed, good mechanical behavior, suitable for various environments, strong voltage isolation ability, delicate appearance; - more space in meter can be saved with combined current transformer in comparison to that of the same number of single form current transformers; - HLX-2 is used for 3-phase-3-wire circuits; HLX-3 is used for 3-phase-4-wire circuits;
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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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Partial Discharge Testing Equipment
PD-Analyser
This is an ‘All in One’ solution for testing and analysing partial discharges in the insulation of high-voltage transformers, cables, GIS and electric machines. The DIMRUS ‘PD Analyser’ help diagnose their insulation state and find any type of defects very effectively.It can be used for temporary or constant monitoring of partial discharge in medium and high voltage systems and cables of any rated voltage.The PD Analyser is the most useful device for condition estimation of high-voltage insulation. This multipurpose device is designed for -Partial discharge measuring in high-voltage insulation at a high noise level.Fast detecting of the defects in different high-voltage equipment and identifying how dangerous they are.
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Multiplexer For Transformer Testing
MUX-R
Raytech Multiplexer MUX R is designed to drastically reduce cabling time and increase test performance. It is made to be used with Raytech Winding Resistance and Turns Ratio Meters. Any MUX R configuration can be easily controlled by a Winding Resistance Meter touch panel or by remote.
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Three Phase Power Analyzer
Model TFT780
Three Phase Power Analyzer PA700TFT is multi-range power Analyzer with basic 0.05% R+R accuracy. 8 range of voltage, 8 range of current and total 64 range of power and power factor gives more accurate result at low power factor. It has waveform mode to check the waveform of voltage and current. As well it has B/H curve mode where user can check live b/h curve of the transformer under test. The gap less four-quadrant power measurement technique gives better accuracy at distorted waveforms or AC drive (VFD) operated power supply.
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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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Current Transformer Bus Bar-Type
BCT 6
Shanghai Powoo Industry Develop Group Limited
Key features: - various mechanical dimensions, highly customer tailored; - there are standard holes on the external casing for fixing with standard bolds; - linear output current, high precision; - small volume, light weight, easy for installation; - ABS anti-combustion plastic casing; - Encapsulated with epoxy resin to ensure strong insulation ability
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Transformer Preamplifier
SR554
Stanford Research Systems, Inc.
The SR554 is a low-noise, transformer-coupled preamplifier optimized for source impedances between 0.05 Ω and 1 kΩ. With an input noise of only 0.1 nV/√Hz, the SR554 can be used in a wide range of low-noise applications.
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External DC12V Power Gem Tester
Fuzhou Zhongtuo Optoelectronic Co.,Ltd
12V power supplies (or 12VDC power supplies) are one of the most common power supplies in use today. In general, a 12VDC output is obtained from a 120VAC or 240VAC input using a combination of transformers, diodes and transistors.
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CT/PT Test Set
PCT200Ai
PCT200Ai is the CT/PT test set (current transformer analyzer) that can finish various current transformer test of different CT and plus reference testing functions of PT. Compared with PCT200i, its accuracy is higher.
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Tan Delta Test Set
TD 5000
The high-voltage generator TD 5000 is a complementary module of STS serie. TD 5000 designed to perform Tan Delta measurements, dissipation factor and capacitance of transformer and bushing at the frequency of the mains or in a wide frequency range.
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Rotary Scale Clamp Meter
1010 CL
Standard Electric Works Co., Ltd
● Rotary scale which presents only one scale in windows at one time to avoid any possible reading errors.● Pointer lock function freezes the reading in dimly lit or hard to reach places.● Ω range ideal for checking the continuity or relays, transformers and motor coils.● TAUT BAND movement.
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Custom DC to DC Converters
CEHCO is manufacturer, re-seller, and distributor of Power Rectification products such as DC Rectifiers, Transformer Rectifier Assemblies, and Custom Power Supplies since 1945.
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High-Speed Transformer Test System
DU-7211
Delta United Instrument Co., Ltd.
Inductance, Q factor, Leakage Inductance, AC Resistance, Capacitance, DC Resistance, Balance,Turn ratio, Open/Short check
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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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Regenerative AC Emulator, 1200 VAC, 65 A, 90 KVA, 3‑Phase
SL1213A
The SL1200A series was designed to handle all your 3-phase AC test needs up to 1200 VAC, from 30 kVA to 630 kVA without the need for a transformer. Two voltage ranges are available: 600 VAC and 1200 VAC. The 600 VAC models are ideal for low voltage inverter test as well as EV and EVSE charging test applications. The 1200 VAC models allow for (HVRT) testing at the IEC LV-AC limit without the need for a large, complex test setup.
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Fully Automatic Transformer Oil Test Set
1. Test as per International standards NMC insulating oil testers are fully automatic micro controller based system,completely self-contained,compact and portable giving smooth variable test voltage from 0 to 60, 80, or 100 kV for testing the dielectric strength of insulating oil in accordance with all international standards like IEC156/IS6792/ASTM D 1816/ASTM D877/ UNE 21 specifications.2. Auto mode NMC insulating oil testers are fully automatic type.1) IEC-156, IS6792, ASTM D 877, ASTM D 1816, UNE 21.2) Withstand Test A3) Withstand Test B4) 5 Minute Test5) User defined3. 100 Test results storage capacity NMC insulating oil testers has a storage capacity of 100 test results which can be recalled and printed.4. LCD display NMC insulating oil testers use LCD for easy readability of the BDV test results.5. Built in printer The printer used is a thermal paper print outs.The paper rolls can be easily installed by any person.6. User Friendly RS 232 Interface RS 232 interface is very easy to use to communicate stored data which can be saved in text format.7. Safety protection Safety interlocks are provided on the test chamber.Zero interlock protection to ensure operator safety.8. Accurate Performance The kit not only has all basic functions of an insulating oil tester but also has unique features that are seldom seen in similar products. For e.g. PROOF test A, PROOF test B, 5 Minntes test, LCD to display all test data.It ensures high work efficiency and reliability in any tough environment.
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Isolation Transformers
Provide line isolation, noise filtering and surge suppression for electronics in industrial, office and network environments.
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Autotransformer
T-1007
The Titan Series T-1007 Auto-transformer is used to conveniently scale the standard OV to 130V / 260V full scale Titan AC Power Source/Frequency Converter output to either X .5 stepdown (OV to 65V) or X2 stepup (OV to 520V). It has a 1.2 KVA power rating with excellent bandwidth and voltage regulation.The unit is of toroidal design, making it approximately half the size and weight of a comparable stacked laminate transformer. It is center filled with epoxy for isolation and durability, and features simple 1/4" bolt center mounting.
