Functionality; Function Block; Input And Output Signals - ABB REG650 Technical Manual

1MRK 502 034-UEN -
7.8.2
7.8.3
7.8.4
Technical Manual

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 protect the inadvertently energized
generator.
Accidental energizing protection for synchronous generator (AEGGAPC) takes the
maximum phase current input from the generator terminal side or from generator
neutral side and maximum phase to phase voltage inputs from the terminal side.
AEGGAPC is armed when the terminal voltage drops below the specified voltage
level for the preset time.

Function block

AEGGAPC
I3P*
U3P* START
BLOCK ARMED
BLKTR
IEC09000783-1-en.vsd
IEC09000783 V1 EN
Figure 103: AEGGAPC Function block

Input and output signals

Table 108: AEGGAPC Input signals
Name Type
I3P GROUP
SIGNAL
U3P GROUP
SIGNAL
BLOCK BOOLEAN
BLKTR BOOLEAN
Table 109: AEGGAPC Output signals
Name Type
TRIP BOOLEAN
START BOOLEAN
ARMED BOOLEAN
TRIP
Default Description
- Three Phase Current input
- Three Phase Voltage input
0 Block of function
0 Block of trip
Description
Trip signal from accidental energizing protection
Start signal from accidental energizing protection
True when accidental energizing protection is
armed
Section 7
Current protection
201