8.13.1.1
Functionality
Inadvertent or accidental energizing of off-line generators has occurred often enough
due to operating errors, breaker head flashovers, control circuit malfunctions, or a
combination of these causes. Inadvertently energized generator operates as induction
motor drawing a large current from the system. The voltage supervised overcurrent
protection is used to detect the inadvertently energized generator.
Accidental energizing protection for synchronous generator (AEGPVOC) takes the
maximum phase current input and maximum phase to phase voltage inputs from the
terminal side. AEGPVOC is enabled when the terminal voltage drops below the
specified voltage level for the preset time.
8.13.1.2
Function block
AEGPVOC
I3P*
U3P*
BLOCK
BLKTR
TRIP
START
ARMED
IEC13000198-1-en.vsd
IEC13000198 V1 EN
Figure 205:
AEGPVOC Function block
8.13.1.3
Signals
Table 235:
AEGPVOC 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 236:
AEGPVOC Output signals
Name
Type
Description
TRIP
BOOLEAN
Trip signal from accidental energizing of generator
protection
START
BOOLEAN
Start signal from accidental energizing of generator
protection
ARMED
BOOLEAN
True when accidental energizing of generator
protection is armed
1MRK502052-UEN B
Section 8
Current protection
443
Technical manual
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