CEHCO

(0 TO 5000 VDC, 70 AMPS OUTPUT)

Customer requirements are shown below:

• 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)

The photo of the unit is shown below. This is a 12 pulse High Voltage SCR Controlled power supply.

High Voltage SCR Controlled Power Supply,  P/N 18278PS

Details of the 12000 V (PIV) 6 pulse diode/rectifier assemblies are shown below:

6 Diode Bridge 60 Amp, 12000 Volts blocking Voltage.
The 6 pulse diode/rectifier assembly is inside the red fibre glass plenum.

To discuss you specific requirements please contact us toll free at (800) 595-7096, or send us an email at [email protected].