EGCP-2 Engine Generator Control Package
Manual 26174
132
Woodward
Synchronizer Timing
The time line diagrams below illustrate the various timing sequences the
synchronizer function uses when paralleling single and multiple units across the
generator or mains breaker (depending on application).
UNIT ON LOAD
: SYNCH TIMEOUT ACTIVE AND EXCEEDED
PHASE AND VOLTAGE
SYNCHRONIZER TIME LINE
C
O
M
M
A
N
D
IS
S
U
E
D
C
O
M
M
A
N
D
R
E
M
O
V
E
D
WITH RECLOSE ATTEMPTS
ACTIVATED
SYNCHRONIZER
S
Y
N
C
H
R
O
N
IZ
E
R
A
C
T
IV
E
S
Y
N
C
H
T
IM
E
O
U
T
E
X
C
E
E
D
E
D
C
O
M
M
A
N
D
IS
S
U
E
D
C
O
M
M
A
N
D
R
E
M
O
V
E
D
= SYNCH TIMEOUT PERIOD
C
B
H
O
LD
T
IM
E
D
W
E
LL
T
IM
E
PHASE AND VOLTAGE
MATCHING
B
R
K
R
C
LO
S
E
IN
S
Y
N
C
H
.
= SYNCH TIMEOUT PERIOD
R
E
C
LO
S
E
D
E
LA
Y
SYNCHRONIZER OFF
TIMEOUT ALARM ACTIVE
B
R
K
R
C
LO
S
E
A
LA
R
M
R
E
S
E
T
(P
A
R
T
IA
L)
STANDARD SEQUENCE:
ACTIVATED
SYNCHRONIZER
B
R
K
R
C
LO
S
E
SYNC TIMEOUT ACTIVE (>0 sec.)
D
W
E
L
L T
IM
E
C
B
H
O
LD
T
IM
E
MATCHING
PHASE AND VOLTAGE
IN
S
Y
N
C
H
.
B
R
K
R
C
LO
S
E
(CB AUX INPUT RECEIVED)
BREAKER CLOSED
C
O
M
M
A
N
D
R
E
M
O
V
E
D
B
R
E
A
K
E
R
O
P
E
N
C
O
M
M
A
N
D
IS
S
U
E
D
B
R
E
A
K
E
R
O
P
E
N
B
R
E
A
K
E
R
M
O
D
E
)
(S
Y
N
C
H
R
O
N
IZ
E
R
IN
O
P
E
N
U
N
L
O
A
D
C
O
M
M
A
N
D
IS
S
U
E
D
MATCHING
C
B
H
O
LD
T
IM
E
T
R
IP
P
O
IN
T
A
T
U
N
LO
A
D
TIME
UNLOAD RAMP
SYNCHRONIZER OFF
020-100
00-04-27
Figure 5-4. Synchronizer Time Line—Standard Sequence
Loss Of Mains Detection and Action
The EGCP-2 can be configured to detect a loss of mains condition, and respond
to that condition by isolating the mains from the load, and transferring the supply
of power to the load from the mains to on site engine generator sets.
The EGCP-2 can be configured for single or multiple unit, no parallel or mains
parallel system operation, which will detect a loss of mains. The loss of mains
action is a combination of synchronizing and load control functions of the EGCP-
2. These functions allow the EGCP-2 controls to operate effectively upon a loss
of mains condition.
Below are timing diagrams for mains parallel and no parallel systems. These time
lines apply to the master control in multiple unit systems, or to any single unit
application.