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Product
Ultrafast Rectifiers
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The ST rectifier diode designs deliver performance for applications with very different VF/Qrr trade-offs depending on targeted functions. The minimal power losses of the ST rectifiers range is totally adapted to mains rectification, bypass, boost, bootstrap, freewheel and HF rectification functions. Inside these generic functions, the topology evolution in e.g. resonance or multilevel is followed constantly by suited designs. Ultrafast rectifiers are belonging to the STPOWER family.
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Product
Traction Test Rectifiers
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A traction test system is defined as a rectifier with a DC output voltage above 400 VDC to a maximum of 4,500 VDC. (Kinetics manufactures only air-cooled systems) A Kinetics test system includes the required OSHA designated safety features for testing power supplies as a minimum for operator interface.
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Product
Active Switching Rectifiers, 2 KW, P/N 6016C
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- Active Switching Rectifier, 2 KW, P/N 6016C- Input Range: 9 VAC to 35 VAC, 3 PH- Frequency Range: DC to 10 kHz- DC output: 13.5 VDC, 70 Amps without any heatsink (Test #1)- DC output: 13.5 VDC, 150 Amps with heatsink (Test #2)- Dimensions: 8″W x 8″L x 3″H or similar- AC to DC and DC to DC applications- Generates less heat as power MOSFET Switching is used- The output voltage is the same as the input voltage
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Product
Field Effect Rectifiers
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ST field-effect rectifier diodes (FERD) help improve designs with new versions focusing on trade-off upgrades. Field-effect rectifier diodes belong to our STPOWER family. The design of the FERDs has allowed both a decrease in the voltage drop and a decrease in the leakage current temperature coefficient. As a result, the runaway safety margin is improved and maybe beyond the typical safety margin of Schottky barrier diodes.
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Product
Diodes And Rectifiers
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Vishay is a world leader in diodes and rectifiers, having a broad technology base and a solid position in automotive, industrial, computing, and consumer markets.
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Product
Selenium Rectifiers
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Selenium rectifier stacks are made up of selenium cells, which are mounted together and circuited as required for each application. They are available in configurations to suit all of the rectifier circuits.CEHCO is a leader in supplying selenium rectifier stacks. We are selenium rectifier replacement specialist. In fact, the company can assemble and deliver any selenium rectifier in 48 hours or less. And the stacks contain extremely high-quality, high-density, vacuum-processed cells to ensure uniformity, stability, and long life.
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Product
Switch Mode Power Supplies-Water Cooled
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The MSW Rectifiers are based on Switch Mode Technology. This reliable technology assures excellent quality DC currents with a ripple of < 3% and a control accuracy of less than 1%.The MS-Series features constant voltage and current control with easy, quick installation and maintenance. Modular versions easily increase the output by means of series or parallel connection. All models have DC short circuit protection. With forced air-cooled models, the cooling air quantity is controlled in relation to the load reducing contamination and noise levels.
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Product
HIGH VOLTAGE SCR CONTROLLED POWER SUPPLY
xPS Series
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High Voltage SCR Controlled Power Supply, P/N 18278PSPower Rating: 350 KW.Input: 480 VAC, 3 PH, 60 HzOutput: 0 to 5000 VDC, 70 Amps maxRipple: 2 % approximately at maximum rated voltageConfiguration: 12 pulse externally SCR controlled rectifier systemProtection Devices:Input contactorsOverload relay shutoffInput surge suppressorThermal switchesOutput current limiting resistor (made with 5 Ohm Kanthal heating element)Emergency power shutoffCooling: Each 6 pulse rectifier assembly is cooled by three 10” fansInterface: 4/20 ma converter interface for output voltage and output current to SCR controller.Enclosure: The overall dimension of the unit is (78”H x 38”W x 53”D). It is comprised of two separate enclosures each with dimensions of (78” H x 38” W x 26” D) which are integrated together to form a single enclosure. Each half enclosure has one 6 pulse transformer and one 6 pulse high voltage rectifier.Weight: Approx. 5000 lbs.SCR Controller: The 12 pulse SCR controller is supplied by the customer. We were responsible for the 12 pulses Transformer and 12 pulses Rectifier section. Portability: Unit can be lifted up with a fork lift. It can also be moved around with a 5000 lb pallet jack.Transformer: Two 200 KVA transformers are used to step 480 VAC to 3750 VAC each in a 12 pulse configurationRectifiers: Two 6 pulse rectifier assemblies capable for 5000 VDC and 60 Amps output were used. The high voltage rectifier assemblies are isolated and protected in a fiberglass plenum within the enclosure.Blocking Diode: Each diode of the 6 pulse rectifier consists of 10 diodes in series to offer a blocking voltage of 12000 V (PIV)
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Product
Diode Tester
FEC200E
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Frothingham Electronics Corporation
The FEC200E is an automatic computer- controlled diode and rectifier tester. It is controlled by a standard PC-compatible computer running FreeDOS.
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Product
AC and DC Electronic load
63800 series
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The Chroma 63800 Loads can simulate load conditions under high crest factor and varying power factors with real time compensation even when the voltage waveform is distorted. This special feature provides real world simulation capability and prevents overstressing thereby giving reliable and unbiased test results. The 63800's state of the art design uses DSP technology to simulate non-linear rectified loads with its unique RLC operation mode. This mode improves stability by detecting the impedance of the UUT and dynamically adjusting the load's control bandwidth to ensure system stability. Comprehensive measurements allow users to monitor the output performance of the UUT. Additionally, voltage & current signals can be routed to an oscilloscope through analog outputs. The instrument's GPIB/RS232 interface options provide remote control & monitor for system integration. Built-in digital outputs may also be used to control external relays for short circuit (crowbar) testing.
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Product
Industrial Standby Battery Monitoring Systems
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Batteries are the power storage medium for all Power Rectifier and UPS Systems. Modern Rectifiers and UPS control systems generally supply the user with only a summary of the condition of the associated power systems, however Battery Monitoring systems specifically measure, record and analyse the individual cell and battery module parameters in detail.
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Product
Electronic Ballast Automatic Test Equipment
ATE-1
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Test series connection, parallel connection and series/parallel connections of the electronic ballast (about 15 kinds of connections), available for various electronic ballast. • With a precise resistance box, tube is substituted for the resistance, can act as many as 6 tubes. Resistance value: 1-4095Ω adjustable. • Measure input parameters (vrms, irms, w, pf, harmonics, etc), output parameters (on-circuit voltage, lamp voltage, filament voltage, lamp current, lamp power, oscillatory frequency), can also test the ballast efficiency, abnormity protection, and power symmetry of partial rectifier effect and etc. • Program controlled AC power source to guarantee the smart choice of input voltage and the frequency. • Equipped with 17 inch LCD controlled machine, specially designed A/D combined with special CPU, has the two left and right testing interfaces to achieve stability of data and high- speed testing. • We can make the special-designed product for you and promise to upgrade the software for free.
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Product
Turns Ratio Testers
TRT Standard Series
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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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Product
Earth Ground Meters
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The earth tester determines ground resistance for both specific and ohm resistances. The earth tester is powered by batteries and have a clock timer function (3 minutes), Data-Hold function, a 3 ½ positions LCD display and their dimensions are 163 x 100 x 50 mm. Resistance ranges come from 20, 200 to 2000 ohms. They have a resolution of 10 / 100 mΩ / 1 Ω. The earth tester measure resistance by means of a constant reverse current (approx. 800 Hz, 2 mA). To measure ground voltage a rectifier is used (5 kΩ/V aprox. 40...500 Hz). The earth tester PKT-2630 series have a small format as well as multiple functions.
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Product
P Series Panel Meters
ST-38N
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Standard Electric Works Co., Ltd
● DC up to 15A● Case and Composition: Acrylic resin front. ABS case. Four studs mounting. Two studs mounting.● Accuracy :DC : Class 2.0 AC : Class 2.5 Rectifier : Class 2.0● Color：Black case, white scale plate.● Pointer：Tube type, color in black or red.
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Product
Stationary Industrial And Railway Power Supply
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For decades, Gustav Klein has been supplying safe power supplies for industry and railways, such as rectifiers, inverters, DC converters, UPS and BSV systems, as well as frequency converters with a fixed output frequency.
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Product
P Series Panel Meters
ST-38
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Standard Electric Works Co., Ltd
● DC up to 15A● Case and Composition: Acrylic resin front. ABS case. Four studs mounting. Two studs mounting.● Accuracy :DC : Class 2.0 AC : Class 2.5 Rectifier : Class 2.0● Color：Black case, white scale plate.● Pointer：Tube type, color in black or red.
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Product
M Series Panel Meters
ST-86
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Standard Electric Works Co., Ltd
● M Series all up to 15A● Case and Composition：Acrylic resin front and ABS resin case. Four studs mounting.● Accuracy：Moving coil type : Class 2.0 Rectifier type : Class 2.0● Color：Black case, white scale plate.● Pointer：Tube type, color in black or red.
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Product
150KW AC/DC Rectifier Battery Charger
SD750250G
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Zhejiang Sandi Electric Co., Ltd
AC-DC Power Rectifier Battery Charger Customized for Lead Acid AGM Gel LiFePO4 Lithium Battery is for DC battery system charging station. With single-phase or 3 phase non neutral conductor AC input, it has the advantages of high efficiency, high power density and low harmonic. 50-750Vdc output voltage range optional, suitable for all types of batteries.
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Product
48V / 250 Amp Load
EL15-48M
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For Telecom Rectifier and Power Supply testing. This particular Load has been designed to operate with Telecom 48V Rectifiers and Power Supplies with output Voltages in the range of 38V to 60V and is extremely cost effective.
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Product
Repair of Six Diode Bridge Assemblies, P/N 5989C
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CEHCO is specialist in repair of various rectifier assemblies. One such assembly is shown below:Specifications:- Six Diode Bridge Assembly, P/N 5989C- AC input terminals: (3, 4 , 5)- DC output terminals: (1), POSITIVE and (2), NEGATIVE
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Product
High Voltage EMC Surge Generator
TM510
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TM510 Surge Generator is mainly used for testing power cable high-resistance and arc-over fault whose grade range is 0-10kV, co-operating with cable fault tester and locating devices to test and locate faults. If the user choose the professional digital milli-ampere-meter, as for cable with grade range about 0- 6kV, the instrument can also be used to do DC&voltage resistance test and current leakage test after the fault is repaired. The instrument is internally equipped with voltage-rise rectifying and discharging device, has complete functions, and is also convenient and safe to be wired and operated.
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Product
48V / 300 Amp Load
EL18-48M
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For Telecom Rectifier and Power Supply testing. This particular Load has been designed to operate with Telecom 48V Rectifiers and Power Supplies with output Voltages in the range of 38V to 60V and is extremely cost effective.
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Product
Switch Mode Power Rack Rectifiers
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The Switch Mode Power Rack Rectifier is a complete modular rectifier designed as a ready-to-go system to generate high-quality DC, available in air or water cooling.
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Product
Bridge Rectifier Diodes
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ST’s portfolio of bridge rectifier diodes is intended for primary bridges. In input primary bridge applications, ST's 1200V bridge diodes achieve very low conduction losses thanks to very low forward voltage characteristics. They can operate at up to +175 °C junction temperature, as a result of reduced leakage currents. Bridge rectifier diodes are belonging to the STPOWER family.
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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.
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Product
Bridge Decking Testing Equipment
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The testing process can detect blow holes, inclusions or thin areas in 'sprayed-type' membranes. Because the concrete contains a small amount of water, it is electrically conductive and a DC Pinhole Detector can be used to create a high voltage which is passed over the surface by the use of a brush electrode. An alarm will sound to identify any small defects which can be rectified so that the integrity of the coating can be verified.
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Product
Analog Power Supply
Type NPS-2412
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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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Product
Refurbished Rectifiers
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CEHCO has a large inventory of used and refurbished rectifiers in stock. All include 3 month part warranty.
