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.
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