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A-18
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Mg1
Mg2
THRY
IM
R(L1)
S(L2)
T(L3)
(T1)U
(T2)V
(T3)W
H
O
L
FW
RV
CS
CM1
AL1
AL2
AL0
ELBC
ELB
Mg
FWY
RVY
CSY
Mg
ON
Mg1
Mg2
CS
FWY RVY
ON
ON
ON
ON
OFF
NOTE 1: When the ELB trips due to a ground-fault, the commercial power
source circuit will not operate. Therefore, when a backup is
necessary, take a commercial power source circuit from the ELBC.
NOTE 2: Use weak current relays for FWY, RVY, and CSY. Separate AC
relays from DC relays. The above sequence is a reference drawing
for timing.
Mg1 and Mg2 interlocking time
Set time by timer 2C
(The time is generally set to 1 to 3 seconds. Error may come when the set time is 4 seconds or more.)
[F-22] IPS WAIT
Inverter running
start
Running
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20 ms or more
Connection example diagram and timing for commercial power source switching running