Six Diode Bridge Assembly Using 300 Amp Diodes

Product Overview

Bridge Rectifier Assemblies are constructed by packaging diodes and/or SCR’s components with heat sink extrusions in a diode bridge circuit. A bridge rectifier power supply can be a four diode assembly or a six diode assembly. A six diode bridge assembly has significantly lower ripple content (5%) than a four diode bridge assembly (50%). These rectifiers can be diode assemblies, SCR assemblies (consisting of SCRs instead of diodes) or hybrid assemblies (consisting of SCRs and diodes). Review the bridge rectifier schematics below for more information.

CEHCO has considerable experience in building 6 Diode bridge assemblies. Shown below is a six diode bridge assembly using 300 Amps diodes, part number 8M-300A-600PIV-6D

Specifications:

• Six diode bridge assembly P/N 8M-300A-600PIV-6D
• Each diode is rated for 300 Amps and 600 PIV
• Estimated dimension 7″H x 13.5″W x 10″D
• Forced cooling may be required

CEHCO is a diode bridge assembly manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

SCR Controlled Variable DC Power Supply, 0 to 10.5 VDC, 130 A Output

Product Overview

This is an AC to DC power supply with 4/20 ma interface. Input is 240 VAC, 1 PH, 60 Hz. Output is 0 to 10.5 DC, 130 Amps. This power supply can be interfaced to a PLC system. These units are customized units, built to order. Unit is shown here as an open panel configuration. We can provide an enclosure with other accessories. 

The block diagram of the unit is shown below:

The photo of the power supply, part number 4085C is shown below:

Specifications:

• SCR Controlled Power Supply with 4/20 mA Interface, P/N 4085C
• Input: 240 VAC, 1 PH, 60 Hz
• Output: 0 to 10.5 VDC, 130 Amps
• 4/20 mA interface with PLC

CEHCO is a SCR Controlled Power Supply manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

DC Lighting Power Supply for Movie Studio

Product Overview

CEHCO has built 7 DC lighting power supplies for movie studios since 1945. These units range from 200 KW to 625 KW. We have accumulated a wealth of expertise in developing these units for our customers. The systems are used to provide 60 Hz flicker free 120 VDC lighting for stages during movie production. Mobile units are installed with four wheels.


Power input to the units range from 480 VAC 3 PH to 4160 VAC 3 PH. Some of these units were located in close proximity to computers and other sensitive equipment. Thus the lighting systems were built with suppressors to inhibit EMI noise.

The photo of the 625 KW power supply is shown below:

Movie Studio Lighting Power Supply

Specifications:

• DC Lighting Power Supply, P/N 17000PS
• Power Rating: 625 KW
• Input: 4160 VAC, 3 PH, 60 Hz
• Output: 120 VDC, 2500 A (dual)
• Enclosure: NEMA 3R
• Portability: 4 wheels were installed
• Protection: Input vacuum contactor, output fusing and temperature sensors
• Cooling: Forced air cooling by external fans

CEHCO is a DC lighting power supply manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

High Voltage SCR Controlled Power Supply, 0 to 2500 VDC, 90 A Output

Product Overview

High voltage SCR controlled power supplies consist of a SCR controller on the 480 VAC three phase input power lines. The three phase power transformer is used to step up the secondary voltage so that after rectification the desired high voltage DC output is achieved. Each diode in the rectifier circuit consists of multiple diodes in series to increase the overall peak inverse voltage (PIV) of the diodes. The high voltage rectifier section is enclosed inside a fiber glass plenum to offer high voltage protection. Circuit breakers, fuses, voltmeters and ammeters can be added per customer requirements. 

The block diagram of a high voltage SCR controlled power supply is shown below:

The photo of a 2500 VDC power supply, part number 18498PS is shown below:

High Voltage Power Supply

Specifications:

• High Voltage SCR Controlled Power Supply, P/N 18498PS
• Input:480 VAC, 3 PH, 60 Hz
• Output: 0 to 2500 VDC, 90 Amps
• SCR control
• Power section enclosed in a floor mount enclosure
• Control section is attached to the power enclosure as shown.
• Voltage control and current limit are provided with manual potentiometers.
• Output filter is not included.
• Ripple degrade as output is lowered.
• Voltmeter and Ammeter are provided to monitor output.
• ON/OFF push button capability
• E-Stop to shut off power
• Power on light
• Over temperature shut off protection

CEHCO is a high voltage power supply manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

Selenium Rectifier, 10 plates, P/N C37D5EB1

Product Overview

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. 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-process cells to ensure uniformity, stability, and long life.

The photo of the selenium rectifier power supply, part number C37D5EB1 is shown below:

Specifications:

• Selenium Rectifier, P/N C37D5EB1
• Cell size: 1.5" x 1.5"
• Number of cells: 10

CEHCO is a selenium rectifier manufacturer. We keep all materials (i.e. diodes, SCR’s, heat sinks, etc.) in stock for immediate assembly. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

Single Phase Selenium Rectifier

Product Overview

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. 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-process cells to ensure uniformity, stability, and long life.

The photo and the schematics of the single phase selenium rectifier part number K362B5EB1 are shown below:

Specifications:

• Single Phase Selenium Rectifier, P/N K362B5EB1
• Cell size: 3" x 3"
• Number of cells; 20
• Each cell is rated for: 36 V, 37 A

CEHCO is a selenium rectifier manufacturer. We keep all materials (i.e. diodes, SCR’s, heat sinks, etc.) in stock for immediate assembly. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

Selenium Surge Suppressor, PN K25HX6EBC1

Product Overview

Surge suppressors are used to protect circuits from transients (sudden, brief increases in voltage). Transients of widely varying magnitudes are caused by such circuit components as motors, coils, magnets, relays, and transformers. They are found in all electrical systems and they are notorious for damaging diodes, SCRs, transformers, triacs, and relay contacts.

Surge suppressors can be connected across individual components, part of a circuit, or to supply to an entire circuit. When the voltage is normal, they are in an “off” state and do nothing. However, when a transient raises the voltage they react very quickly and conduct the excess around the components they protect. When the transient has passed they return to normal “off” state. It is cheaper to use surge suppressors than it is to buy new components or have equipment out of service. Surge suppressors can be polar (for direct current circuits) or non-polar (for alternating current circuits) and can be assembled in different configurations to offer surge protection form 3 A to 130 A.

CEHCO surge suppressors are assembled from high-quality selenium cells. These selenium surge suppressors are characterized by extremely smooth operation-they pass increasing amounts of current as the voltage increases without the sudden changes that tend to characterize other types of surge suppressors. They have a high shunt capacitance (0.05 MFD per square inch). And they react faster and have higher wattage capability than silicon suppressors. A brief description of selenium cells is shown bellow.


A sample of a 3″ x 3″ Polar Selenium Surge Suppressor, part number K25HX6EBC1 is shown below: Each cell is rated for 25 V, 37 A

Specifications:

• Selenium Surge Suppressor, P/N K25HX6EBC1
• Cell size: 3" x 3"
• Each cell is rated for 25 V, 37 Amps
• Six cell is connected in series
• The selenium suppressor is rated for: 150 V, 37 Amps

CEHCO is a selenium surge suppressor manufacturer. We keep all materials (i.e. diodes, SCR’s, heat sinks, etc.) in stock for immediate assembly. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

Six Diode Bridge Assembly Using 150 Amp Diodes

Product Overview

Bridge Rectifier Assemblies are constructed by packaging diodes and/or SCR’s components with heat sink extrusions in a diode bridge circuit. A bridge rectifier power supply can be a four diode assembly or a six diode assembly. A six diode bridge assembly has significantly lower ripple content (5%) than a four diode bridge assembly (50%). These rectifiers can be diode assemblies, SCR assemblies (consisting of SCRs instead of diodes) or hybrid assemblies (consisting of SCRs and diodes). Review the bridge rectifier schematics below for more information.

CEHCO has considerable experience in building 6 Diode bridge assemblies. Shown below is a six diode bridge assembly using 150 Amps diodes, part number 8M-150A-1200PIV-6D.

Specifications:

• Six diode bridge assembly P/N 8M-150A-1200PIV-6D
• Each diode is rated for 150 Amps and 1200 PIV
• Estimated dimension: 7″H x 13.5″W x 10″D
• Forced cooling may be required

CEHCO is a bridge rectifier assembly manufacturer. We keep all materials (i.e. diodes, SCR’s, heat sinks, etc.) in stock for immediate assembly. To discuss your specific rectifier stack requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

Unregulated Transformer Rectifier Assembly, 125 VDC, 30 Amps Output

Product Overview

CEHCO builds many Transformer Rectifier assemblies which has a single phase power input. With this design a 4 Diode Rectifier assembly is needed. The output ripple after the Bridge Rectifier Assembly is 50%. This 50% rectified output is O.K. for certain motor applications, where a strict DC output with minimum ripple is not required. If output ripple needs to be reduced, an output filter capacitor can be added.

The block diagram of the unregulated transformer rectifier assembly is shown below:

The photo of the unregulated transformer rectifier assembly, part number 18580PS is shown below:

Specifications:

• Unregulated Transformer/Rectifier Assembly, P/N 18580PS
• Input: 480 VAC, 3 PH, 60 Hz, 6 Amps
• Output: 125 VDC, 30 Amps
• Enclosure: 36″H x 28″W x 18″D
• Disconnect switch is connected on the input side
• Output voltmeter and ammeter is installed on the enclosure
• Fuses and circuit breakers protections are not included

CEHCO is a transformer rectifier assembly manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

MRI Power Supply, P/N MRI208163V

Product Overview

CEHCO MRI variable lighting units offer dimming light capabilities in MRI rooms. These MRI power supplies are built to order. When the Green push button is pressed on the front of the enclosure, output rises to the maximum limit. When the Black push button is pressed on the front of the enclosure, output lowers to the minimum limit. Remote operations of the Raise/Lower output are feasible when a cable and two momentary switches are connected to the main enclosure. Remote assembly is included along with the Main unit. Customer to supply the connecting cables. Our standard MRI power supply is shown below. This unit is offered with input of 208 VAC, 3 PH, 60 Hz only. Output is 0 to 120 VDC, 16 Amps maximum.

The block diagram of the MRI DC lighting power supply is shown below:

The photo of the MRI power supply, part number MRI208163V is shown below:

Specifications:

• 0 to 120 VDC MRI unit, P/N MRI208163V
• Input: 208 VAC ± 5 %, 3 PH, 60 Hz
• Output: 0 to 120 VDC, 16 Amps
• Power: 1.92 KW
• Ripple: 5 %
• Enclosure: Nema 1(24″ H x 20″ W x 9″ D)
• Weight: 205 lbs
• System includes main unit and remote assembly

CEHCO is a MRI power supply manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

Six Diode Bridge Assembly Using 45 Amp Diodes

Product Overview

Bridge Rectifier Assemblies are constructed by packaging diodes and/or SCR’s components with heat sink extrusions in a diode bridge circuit. A bridge rectifier power supply can be a four diode assembly or a six diode assembly. A six diode bridge assembly has significantly lower ripple content (5%) than a four diode bridge assembly (50%). These rectifiers can be diode assemblies, SCR assemblies (consisting of SCRs instead of diodes) or hybrid assemblies (consisting of SCRs and diodes). Review the bridge rectifier schematics below for more information.

CEHCO has considerable experience in building 6 diode bridge assemblies. Shown below is a six diode bridge assembly using 45 amps diodes, part number P/N 2TZ456-45

Specifications:

• Six diode bridge assembly P/N 2TZ456-45
• Each diode is rated for 45 Amps and 600 PIV
• Estimated dimension 4″H x 5″W x 4.5″D
• Forced cooling may be required

CEHCO is a bridge rectifier assembly manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

SCR Controlled Variable DC Power Supply, 0 to 150 VDC, 200 Amps Output

Product Overview

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 phase. 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.

The block diagram of a SCR controlled variable DC power supply is shown below:

The photo of the SCR controlled variable DC power supply, part number 18163PS is shown below:

Specifications:

• SCR Controlled Variable DC Power Supply, P/N 18163PS
• Input: 480VAC, 3PH, 60 HZ
• Output: 0 to 150 VDC, 200 Amp
• Power ON/OFF Contactor with overload relay
• Emergency Power Shut OFF
• Output voltmeter and ammeter installed
• Input potentiometer control
• Ripple is 5% at maximum rated voltage
• Ripple degrades as output is reduced from max
• All input/output connections inside the enclosure
• SCR control
• Over temperature protection
• Power ON pilot light indicator
• All controls are installed on the side of the enclosure
• Top cover, front and rear panel are removable & Manual provided
• Caster wheels provided for mobility
• Dimensions: 40″ H x 28″ W x 18″ D

CEHCO is a variable DC power supply manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

Unregulated Transformer Rectifier Assembly, 120 VDC, 16.7 A Output

Product Overview

CEHCO builds many Transformer Rectifier assemblies which has a single phase power input. With this design a four Diode Rectifier assembly is needed. The output ripple after the Bridge Rectifier Assembly is 50%. This 50% rectified output is O.K. for certain motor applications, where a strict DC output with minimum ripple is not required. If output ripple needs to be reduced, an output filter capacitor can be added.

The block diagram of the unregulated transformer rectifier assembly is shown below:

The photo of the unregulated transformer rectifier assembly, part number 18213PS is shown below:

Specifications:

• Unregulated Transformer Rectifier Assembly, P/N 18213PS
• Input: 120 VAC, 1 PH, 60 Hz
• Output: 120 VDC +/- 10%, 16.7 Amps.
• Ripple: 50%.
• All input output connections are provided on the terminal block.
• Open panel construction: 17″ L x 14″ W panel

Selenium Surge Suppressor, PN S25HX13EN2

Product Overview

Surge suppressors are used to protect circuits from transients (sudden, brief increases in voltage). Transients of widely varying magnitudes are caused by such circuit components as motors, coils, magnets, relays, and transformers. They are found in all electrical systems and they are notorious for damaging diodes, SCRs, transformers, triacs, and relay contacts.

Surge suppressors can be connected across individual components, part of a circuit, or to supply to an entire circuit. When the voltage is normal, they are in an “off” state and do nothing. However, when a transient raises the voltage they react very quickly and conduct the excess around the components they protect. When the transient has passed they return to normal “off” state. It is cheaper to use surge suppressors than it is to buy new components or have equipment out of service. Surge suppressors can be polar (for direct current circuits) or non-polar (for alternating current circuits) and can be assembled in different configurations to offer surge protection form 3 A to 130 A.

CEHCO surge suppressors are assembled from high-quality selenium cells. These selenium surge suppressors are characterized by extremely smooth operation-they pass increasing amounts of current as the voltage increases without the sudden changes that tend to characterize other types of surge suppressors. Selenium suppressors have a high shunt capacitance (0.05 MFD per square inch). And they react faster and have higher wattage capability than silicon suppressors. A brief description of selenium cells is shown bellow.

A sample of a 5″ x 6″ Polar Selenium Surge Suppressor, part number S25HX13EN2 is shown below: Each cell is rated for 130 A. Since two cells are in parallel, the system capability is doubled to 260 A.

Specifications:

• Selenium Surge Suppressor, P/N S25HX13EN2
• Cell size: 5" x 6"
• Each cell is rated for 25 V, 130 Amps
• Two row of cells are connected parallel
• Each row has 13 cells in series
• The selenium suppressor is rated for: 325 V, 260 Amps

CEHCO is a selenium surge suppressor manufacturer. We keep all materials (i.e. diodes, SCR’s, heat sinks, etc.) in stock for immediate assembly. To discuss your specific rectifier stack requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

MRI Power Supply, P/N MRI208203

Product Overview

CEHCO is a MRI power supply manufacturer. MRI Power Supplies are used in MRI Imaging rooms in hospital environment. 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 MRI rooms, where a 60 Hz flicker free light environment is desired.  

The block diagram of the MRI power supply, part number MRI208203 is shown below:

The photo of the MRI power supply, part number MRI208203 is shown below:

Specifications:

• MRI Power Supply, P/N MRI208203
• Input: 208 VAC ± 5 %, 3 PH, 60 Hz
• Output: 120 VDC fixed, 20 Amps
• Power: 2.4 KW
• Ripple: 5 %
• Enclosure: NEMA 1(20”H x 16”W x 9”D)
• Weight: 125 lbs

6 Diode Bridge Assembly Using 2000 Amp Diodes, P/N 24N-2000A-1200PIV-6D-2F-120

Product Overview

CEHCO is a Bridge Rectifier Assembly manufacturer.  Bridge Rectifier Assemblies are constructed by packaging diodes and/or SCR’s components with heat sink extrusions in a diode bridge circuit. A bridge rectifier power supply can be a four diode assembly or a six diode assembly. A six diode bridge assembly has significantly lower ripple content (5%) than a four diode bridge assembly (50%). These rectifiers can be diode assemblies, SCR assemblies (consisting of SCRs instead of diodes) or hybrid assemblies (consisting of SCRs and diodes). Review the bridge rectifier schematics below for more information.

CEHCO has considerable experience in building 6 Diode bridge assemblies. Shown below is a six diode bridge assembly using hockey puck diodes, part number 24N-2000A-1200PIV-6D-2F-120.

2000 Amp Bridge Rectifier

Specifications:

• Six Diode Bridge Assembly, P/N 24N-2000A-1200PIV-6D-2F-120
• Each diode is rated for 2000 Amps, 1200 PIV
• Six holes are provided on the + and – bus bars, so that 12 each (4/0) cables can be connected.
• Three holes on AC1, AC2 and AC3 can accommodate 6 each (4/0) cables.
• Estimated dimensions: 31.5”L x 20.5”W x 12.0”H
• Weight: 130 lbs
• Two localize fans are provide for cooling.
• Customer is to provide 120 VAC power to the fans