SCR Controlled Power Supply with PLC Interface, 300 KW, P/N 19011PS

Product Overview

This SCR Controlled Power Supply is rated for 300 KW. The input power is 480 VAC, 3 PH, 60 Hz. The Output is 450 VDC to 1000 VDC, 300 Amps. The SCR controller is used to varied the output from 450 VDC to 1000 VDC. An external 120 VAC, 1 PH, 60 Hz is required to turn on the unit. 

The system overview of the SCR Controlled Power Supply is shown below:

Specifications:

• SCR Controlled Power Supply with PLC interface, 250 KW, P/N 19011PS
• 480 VAC three phase is applied at L1, L2 and L3.
• 400 to 1000 VDC, 250 Amps Max output is available at POSITIVE and NEGATIVE
• Ripple: 0.05%
• 120 VAC single phase is applied at pins 1 and 2.
• When PLC controlled signal is applied at pin 3 and 4, the system turns ON and the Power On Light is illuminated.
• When PLC controlled signal is removed at pin 3 and 4, the system shuts OFF.
• Fault signal is sent to the PLC at pins 5 and 6. Fault Light is illuminated.
• When EPO button is pressed, three phase power is removed from the system. 
• EPO button should be pulled out to resume power to the system.
• Customer to provide the PLC and control interface to the system.
• Remote EPO with a Power ON light and Fault light is included.
• Unit will be built per guidelines UL 508C, UL 1012.

The entire system is housed inside an indoor enclosure as shown below:

The photo of the enclosure is shown below:

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

2000 Amps Bridge Rectifier

The Photo and schematic of the 2000 Amps Bridge Rectifier is shown below:

Specifications:

• Six Diode Bridge Assembly, P/N 24N-2000A-1200PIV-6D-2F-120
• Each diode is rated for 2000 Amps, 1200 PIV
• 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
• Measured temperature of the hockey puck at 2000 Amps output: 168°F or 75°C

To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

Temperature Rise Test on 2000 Amps Bridge Rectifier

Test Results To Prove 2000 Amps Output capability

The photo of the 2000 Amps Bridge Assembly is shown Figure 1:

Figure 1

Tests were performed on Figure 1 per set up of Figure 2:

Figure 2

Test results are shown below:

1. Primary Input: 149 VAC, 28 Amps, 3 PH, 60 Hz approximately 
2. Input power: 149 x 28 x 1.732 = 7225 VA 
3. Secondary output: 2.56 VAC L-L, 800 Amps approximately 
4. Transformer output power = 2.56 x 800 x 3 = 6144 VA approximately 
5. DC output: 100 mV (2000 Amps) 
6. Test was run for 15 minutes 
7. Worst case heat sink temperature measured: 138°F 
8. Worst case hockey puck temperature measured: 168°F 
9. Fan 1 and fan 2 are ON during the test. 

Conclusion:

1. Hockey pucks are 2000 amp capability. 
2. Hockey pucks are functional up to 80°C or 176°Foperating temperature. 
3. The test proves that Figure 1 is good for 2000 Amps capability. 
4. To increase the capability to 2500 Amps, forced cooling as shown in Figure 3 is recommended. Fan 1 and Fan 2 are parts of the 2000 Amps Bridge Assembly. Fan 3 and Fan 4 are additional fans installed on the enclosure to exhaust air flow. 

Figure 3

Rectifier Acquisition

The principals at Carl E Holmes Company (CEHCO) are seeking the acquisition of companies and product lines that meet the criterion outlined below:

1.     Manufacturer of custom rectifiers or devices.

2.     Market segments that are new to CEHCO or a solid enhancement to our existing markets.

3.     New products or diversification of CEHCO, within the current market we serve for.

4.     Sales of 1/2 million to 3 million range.

5.     Experienced management has to be available to transition with new owners.

6.     Mergers and acquisitions will be considered on the assumption that CEHCO is the surviving enterprise or major share holder. 

7.     The company long range objective is to enhance its existing business through the acquisitions of companies with product related to current technologies, markets and distribution methods that are currently operating in Canada, Mexico, USA, and Middle East including UAE.

CEHCO (www.cehco.com) is a division of L/C Magnetics (www.lcmagnetics.com). CEHCO was acquired by L/C Magnetics in 2002. CEHCO has been in the rectifier business since 1945. 

L/C Magnetics is a transformer manufacturing company. CEHCO is a rectifier manufacturing company. All our products are manufactured at our facility in Anaheim, California, USA. Please contact us at (800) 595 7096 or (714) 666 0787. Our email is info@cehco.com. Brokers are welcome.  

CEHCO Product Lines

Cathodic Protection Power Supply, 330 KW, Oil Immersed, Medium Voltage, P/N 5313C1

Product Overview

This Cathodic Protection Oil Filled Power Supply is rated for 330 KW. The input power is 14000 VAC, 3 PH, 60 Hz. The DC output is 60 VDC, 5500 Amps. The entire assembly is housed inside an oil filled enclosure. the estimated dimensions of the enclosure are 6 feet H x 7 feet W x 5 feet D. 

The details of the assembly are shown below:

The photo of the rectifier is shown below. The rectifier will be housed inside the oil filled enclosure shown above.

Specifications:

• Oil Filled Transformer Rectifier Assembly, 330 KW
•  Input: 14000 VAC, 3 PH, 60 Hz, 400 Amps (H1, H2, H3) 
• Output: 60 VDC, 5500 Amps (X1, X2)
• Indoor oil filled stainless steel enclosure: 6 feet H x 7 feet W x 5 feet D approximately
• Exposed terminals from the oil filled assembly are (H1, H2, H3) and (X1, X2)

CECHO is a Transformer Rectifier Assembly manufacturer. We can supply oil filled transformers from 10 KVA to 500 KVA. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

Refurbished Delta DC Rectifier, 0 to 84 VDC, 200 Amps (Used in the On-Site Sodium Hypochlorite Generator System), Project 5301C

Product Overview

Delta DC Rectifiers made by Delta DC Power Inc. which is no longer in business are used at Waste Water Plants and Municipal Water Districts throughout USA and Canada. These units tend to overheat and fail due to continuous operation over an extended period of time. 

CEHCO can repair, upgrade and refurbish Delta DC Rectifiers. We can also supply spare parts or provide a brand new equivalent replacement unit. 

The photos of the nameplate and the Delta Rectifier with 480 VAC, 3 PH input and 0 to 84 VDC, 200 Amps output are shown below:

System Overview

Figure A

Figure B

Figure C

A. The location of the 120 VAC controlled signal is shown on Figure A. The 120 VAC, 1 PH, 60 Hz is applied at pins 1 and 2 to turn the system ON.

B. The location of the input power 480 VAC is shown on Figure A The 480 VAC, 3 PH, 60 Hz power from the facility is connected to the unit at that location.

C. The location of the three phase monitor is shown on Figure A If the 480 VAC phasing is incorrect, a red light is observed on the three phase monitor. Reverse any to leads (from L1, L2 and L3), so that the three phase monitor shows a green light.

D. The location of pins 5 and 6 is shown on Figure A When pins 5 and 6 contacts are normally open (NO), it indicates a no fault condition. When pins 5 and 6 contact are normally closed (NC), it indicates a fault condition and 480 VAC, 3 PH power is removed from the system.

E. The location of DC output is shown on Figure C The 0 to 84 VDC, 200 Amps is available at + and – inside the enclosure.

F. The location of 4/20 mA voltage signal is shown on Figure A. This signal is connected to the PLC.

G. The location of 4/20 mA current signal is shown on Figure A This signal is connected to the PLC

H. The location of the voltage adjust is shown on Figure A This is a one turn potentiometer. When the knob is adjusted clockwise from minimum to maximum, the DC output voltage changes from 0 VDC to 84 VDC.

I. The location of the current adjust is shown on Figure A This is a ten turn potentiometer. When the potentiometer is fully clockwise, the current control is not used. It is suggested that this current adjust potentiometer should be kept at in the fully clockwise position. If current limiting is desired, rotate current adjust potentiometer counter clockwise.

J. The location of the 4/20 mA voltage signal adjust is shown on Figure A This is a ten turn potentiometer. Adjustment of this potentiometer provides proper 4/20 mA voltage to the PLC.

CEHCO can repair, upgrade and refurbish Delta DC Rectifiers. We also buy and sell used Delta DC Rectifiers. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.

18 Diodes Bridge Assembly Using 91 Amp, 1200 PIV Diodes, P/N 5197C

Product Overview

CEHCO has considerable experience in building Diode bridge assemblies. Shown below is a 18 diode bridge assembly using encapsulated diode modules. Each diode is rated for 91 Amps and 1200 PIV. 

The photo of the 18 diode bridge assembly, part number 5197C is shown below:

Specifications:

• Eighteen diode bridge assembly P/N 5197C
• Each diode is rated for 91 Amps and 1200 PIV. 
• Estimated dimension 8”H x 5”W x 14”L
• One 180 degrees F temperature sensor is installed on the assembly.
• One 120 VAC fan is provided for forced cooling. 
• Customer responsible for providing power to fans.

CEHCO is a Diode Bridge Assembly Manufacturer. 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.