DCFB cards for GE DC drives :: Industrial Electronic Repair

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DCFB cards for GE DC drives

  Posted by Shop on Thursday, June 2 2005

We don't have no DCFB cards for sale but hopefully the information at the bottom might help you repair the units you have. Seeing that you are located in Singapore, we'll look around for a few more days to see if we can find somebody who has some used boards in the US for sale and get back in touch with you via email.


DCFB POWER SUPPLY
The DCFB board receives 38 V ac (±10%) from the CPT (24 V dc). This voltage is full-wave rectified and filtered to produce the unregulated ±24 V dc outputs. The +24 V dc output is rated at 3 A and the –24 V dc output is rated at 1 A. Regulators on the DCFB board derive ±15 V dc from the ±24 V dc supplies. The ±15 V dc outputs are each rated at 0.8 A, of which 0.25 A is available for external loading. The DCFB board also generates a +5 V dc, 4 A output from the +24 V dc supply. The /PSEN signal on 2PL goes to a TTL low state when the +5 V dc supply is in regulation and the signal goes high if the +5 V dc supply goes out of regulation. When high, /PSEN generates a microprocessor reset on the Drive Control Card (SDCC/LDCC). The DCFB board provides isolated +5 and ±15 V dc supplies to power the armature current feedback circuits. The power supply outputs are protected against short circuits by fuses FU2 and FU3 (7 A, 2AG). Light-emitting diodes (LEDs) CR51 and CR55 provide blown fuse indication for these fuses. The 115 V ac output is protected by fuse FU1 (1/2 A, 2AG). Neon light LT1 provides blown fuse indication for FU1.

http://www.geindustrial.com/products/manuals/GEI-100028.pdf



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