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.
- (800) 595-7096
(714) 666-0787 - (714) 666-1939
- quote@cehco.com
- 1139 N. Kraemer Place
Anaheim, CA 92806
United States
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AC to AC Non-Programmable Power Sources
AFC Series
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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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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Variable Transformer DC Power Supplies
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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SCR CONTROLLED DC POWER SUPPLY
74239
CEHCO P/N 74239Power Rating: 60 KWInput: 480 VAC, 3 PH, 60 HZOutput: 0 to 240 VDC, 250 Amp MaxSCR Controlled Power SupplyContactor, Start/Stop Control, Thermal Protection includedVoltage and current adjust availableFull operation and maintenance provided
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Anodizing/Electroplating/Metal Finishing DC Rectifiers
CEHCO can supply Anodizing / Electroplating / Metal Finishing DC Rectifiers. We offer standard products and customized solutions.
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Bridge Rectifier Assemblies
Bridge Rectifier Assemblies are constructed by packaging diodes and/or SCR components with heat sink extrusions in a bridge circuit.CEHCO uses M, T, N and W heat sink extrusions to build rectifier assemblies.
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Two Diode Assembly, P/N 6030C
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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AC to AC Power Supplies, Output 0 to 25 VAC, 3000 AMPS, 75 KW, P/N 5955C
- AC to AC Power Supply, 84 KVA, 1 PH, 60 Hz, P/N 5955C- Input: 240 VAC, 350 Amps- Output: 0 to 25 VAC, 3000 Amps max- Back to back SCR is used to adjust the output voltage- Start / Stop push button- Power ON Light- Voltmeter and Ammeter are included to monitor output voltage and current- Indoor enclosure: 42″H x 32″W x 22″D- Estimated weight: (TBD)
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SCR CONTROLLER WITH REGULATOR
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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SCR Controlled DC power Supplies
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 a single phase.
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Repair of Solid State Switch, P/N 60-SS480
Solid State Switch P/N 60-SS480Input: 480 VAC, 3PH, 60 HzOutput:480 VAC, 3 PH, 60 HzControl Voltage: 120 VAC, 1 PH, 60 Hz
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HIGH VOLTAGE SCR CONTROLLED POWER SUPPLY
xPS Series
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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AC to DC Programmable Power Sources
CEHCO can supply AC to DC Programmable Power Sources. We offer standard or customized solutions. The ADG-L Series is up to 1000 VDC maximum output. ADG-P Series is up to 2000 VDC maximum output.
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IGBT Power Supplies - Air Cooled
CEHCO The MSA1000 Rectifiers are based on IGBT 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.