motor drawing a large current from the system. The voltage supervised overcurrent
protection is used to protect the inadvertently energized generator.
Accidental energizing protection for synchronous generator (AEGGAPC) takes the
maximum phase current input from the generator terminal side or generator neutral
side and maximum phase to phase voltage inputs from the terminal side. AEGGAPC
is enabled when the terminal voltage drops below the specified voltage level for the
preset time.
8.8.3
Function block
AEGGAPC
I3P*
U3P*
BLOCK
BLKTR
TRIP
START
ARMED
IEC09000783-1-en.vsd
IEC09000783 V1 EN
Figure 119:
AEGGAPC Function block
8.8.4
Signals
Table 135:
AEGGAPC Input signals
Name
Type
Default
Description
I3P
GROUP
SIGNAL
-
Three Phase Current input
U3P
GROUP
SIGNAL
-
Three Phase Voltage input
BLOCK
BOOLEAN
0
Block of function
BLKTR
BOOLEAN
0
Block of trip
Table 136:
AEGGAPC Output signals
Name
Type
Description
TRIP
BOOLEAN
Trip signal from accidental energizing protection
START
BOOLEAN
Start signal from accidental energizing protection
ARMED
BOOLEAN
True when accidental energizing protection is
armed
Section 8
1MRK 502 048-UEN A
Current protection
240
Technical manual
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