Carl E. Holmes Company
CEHCO provides SCR and Diode Rectifiers for a variety of applications that includes anodizing, water treatment, general metal finishing, crane duty, electrochemical applications, and the latest development in power conversion technology.
- (714) 666-0787
(714) 624-4740 - quote@cehco.com
- 1139 N. Kraemer Place
Anaheim, CA 92806
United States of America
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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
AC to AC Non-Programmable Power Sources
AFC Series
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CEHCO can supply AC to AC Non-Programmable Power Sources. We offer standard or customized solutions. The AFC Series is from 500 VA to 2000 KVA.
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Product
Replacement 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.
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Product
Two Diode Assembly, P/N 6030C
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Two Diode Assembly, P/N 6030CEach diode is rated for 400 Amps, 1200 PIVTwo diodes are installed on one heatsinkDimensions: 8”H x 8”W x 10”DEstimated weight: 20 lbs.When A is greater than B, Battery 2 is reversed BiasWhen B is greater than A, Battery 1 is reversed Bias
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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
Delta DC Rectifier Repair/Refurbishment
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Delta DC Rectifiers are used by original equipment manufacturers to build On-Site Sodium Hypochlorite Generator Systems. These power supplies are generally operated at full load for 24/7 operations at high temperatures. Hence, these power supplies must be extremely rugged and must be de-rated significantly to achieve long operating life.
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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 18278PS Power Rating: 350 KW. Input: 480 VAC, 3 PH, 60 Hz Output: 0 to 5000 VDC, 70 Amps max Ripple: 2 % approximately at maximum rated voltage Configuration: 12 pulse externally SCR controlled rectifier system Protection Devices: Input contactors Overload relay shutoff Input surge suppressor Thermal switches Output current limiting resistor (made with 5 Ohm Kanthal heating element) Emergency power shutoff Cooling: Each 6 pulse rectifier assembly is cooled by three 10” fans Interface: 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 configuration Rectifiers: 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
MRI Power Supplies
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MRI Power Supplies are used in MRI Imaging rooms in hospital environments. The lights in the MRI rooms require DC power. If AC power is used, the quality of the MRI imaging process is compromised. These units are ideal for the MRI room, where a 60 Hz flicker-free light environment is desired. CEHCO offers four models which are shown below.
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Product
SCR Diode Testers
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SCRs and Diodes are used in the power sections of various power systems. A SCR Diode Tester is an important piece of equipment to determine if a SCR or a diode is defective in a power circuit. It is difficult and time-consuming to troubleshoot SCRs and Diodes with a digital meter.
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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
Surge Suppressor to Suppress SCR Spikes from Customer Equipment Going Back to Utility Power, P/N 5965C
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This Suppressor Board is ideal for SCR Controlled Power Supplies when SCR control is on the primary side.The Suppressor Board will prevent SCR spikes to go back into the 480 VAC utility power lines.
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Product
Switch Mode Power Supplies-Air Cooled
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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
IGBT Power Supply, 0 to 16 VDC, 3000 AMPS, P/N 6134C
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IGBT Power Supply, 48 KW, P/N 6134CInput: 480 VAC, 3 PH, 60 HzOutput: 0 to 16 VDC, 3000 AmpsRipple does not degrade when the output voltage is reducedDigital remote with Voltmeter and Ammeter and potentiometers includedDimensions: 20.00”W x 32”H x 24.5”D.Estimated weight: 300 lbs.
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Product
IGBT Power Supply, 120 KW, 0 to 16 VDC, 7500 AMPS, P/N 6132C
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IGBT Power Supply, 120 KW, P/N 6132CInput: 480 VAC, 3 PH, 60 HzOutput: 0 to 16 VDC, 7500 AmpsRipple does not degrade when the output voltage is reducedDigital remote with Voltmeter and Ammeter and potentiometers includedDimensions: 20.00”W x 67”H x 24.5”D.Estimated weight: 600 lbs.
