GE DGP Series Instruction Manual page 263

APPENDIX C
APPENDIX C DGP FAQC.1 DGP FAQ
1. Why does my DGP display a "351" error code?
The current inputs INS and INR are derived from the residual connections of the respective phase CTs and do
not require dedicated neutral CTs. Zero-sequence current at system and/or neutral side of the generator stator
windings is calculated and compared with the measured INS and/or INR values by the DGP as part of a back-
round self-test. If they do not match, a 351 error code is generated.
2. Why can't I get the 27 function (undervoltage) to operate?
The 27 element operates when the generator is considered on-line. The DGP recognizes the on-line status DI1
"Generator Off-Line". An Auxiliary b contact will allow the DGP to interpret the correct generator status.
+
3. How do I order replacement parts for my DGPs?
The following table shows the replacement part numbers and their availability for the DGP:
MODULES
SSP301
ANI301
DAP201
DSP401
MGM781 - specify 1A or 5A
MMI301
0215B8070G0004
0215B8070G0004
0215B8070G0004
DIT 103
DIT 101
DIT 102
4. I have an older version of DGPxxxAAA firmware. What upgrade kit do I order to upgrade my
DGPxxxAAA to the latest firmware revision?
Use kit 0355A3489G0001.
GE Power Management
UNDERVOLTAGE (1)
DI1
GEN.
OFF-LINE
DGPxxxAAA






 48 V DC
 125 V DC
 250 V DC

DGP Digital Generator Protection System
C.1.1 FREQUENTLY ASKED QUESTIONS
A N D
DGPxxxABA DGPxxxACA
 
 
 
 
 
 
 48 V DC  48 V DC
 125 V DC  125 V DC
 250 V DC  250 V DC


C.1 DGP FAQ
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