Deif Multi-line 2 - Page 49

AGC Designer’s Reference Handbook
DEIF A/S Page 49 of 168
Example 1 (6590 Mains failure voltage
)
Start engine and open MB:
Example 2 (6590 Mains failure voltage
)
Start engine:
Conditions for breaker operations
The breaker sequences react depending on the breaker positions and the frequency/voltage
measurements.
GB On
MB On
Mains failure
detected
Gen start seq
t
FD
Gen stop seq
Mains O
K
Mains OK
t
FOD
Gen running
Gen f/U OK
t
MCB
t
F
U
t
GBC
GB On
MB On
Mains failure
detected
Gen start seq
t
FD
Gen stop seq
Mains OK
Mains O
K
t
FOD
t
F
U
t
MBC
Gen running
Gen f/U O
K