GE DGP Series, Instruction Manual

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DGP Digital Generator Protection System GE Power Management
1.3 PROTECTION FEATURES 1 PRODUCT DESCRIPTION
1
1.3 PROTECTION FEATURES 1.3.1 DESCRIPTION
The following protection functions are included with the DGP system.
A single-line diagram for the DGP is shown below.
Figure 1–2: SINGLE LINE DIAGRAM
Table 1–3: DGP PROTECTION FUNCTIONS
PROTECTION FUNCTION ANSI CODE(S)
Stator Differential 87G
Current Unbalance 46
Loss of Excitation 40
Anti-Motoring 32
Time Overcurrent with Voltage Restraint 51V
Stator Ground 64G1, 64G2, 27TN
Ground Overcurrent 51GN
Over-excitation 24
Overvoltage 59
Undervoltage 27
Over and Underfrequency 81
Voltage Transformer Fuse Failure VTFF
Accidental Energization AE
To
MODEM
To
LAPTOP
PC
TRIP
ALARM
52G
GSU
Transf.
TO
POWER
SYSTEM
GEN.
51GN
64G1
64G2 27NT
RS232
46 87G 40
32
51V
VTFF
RS232
64G2 24 32
40
27
59
81
VTFF DGP 51V