Hitachi SJ Series, User Manual

Page: 364 / 786

12-17-3
Chapter 12 Inverter Functions
• For the behavior of the commercial switching, refer
to the following sample connection diagram for the
commercial switching operation and timing.
• Use light electrical relays for FWY, RVY, and CSY.
The following sequence is a reference diagram for
timing.
Parameters
Take a mechanical interlock for MC3 and MC2.
Otherwise, you run the risk of damage to the
inverter.
• Since the commercial circuit does not operate
either when the earth leakage circuit breaker
(ELCB) trips, connect the commercial circuit of
another system to MC2 if the backup is required.
Example of timing from INV to the commercial
operation Example of timing from the commercial operation to
INV
Item Parameter Data Description
Selecting the input
terminal
[CA-01]~[CA-11] 035 Used for the commercial switching [CS].
Instantaneous power
failure/undervoltage
retry waiting time
[bb-26] 0.3~100.0(s)
Set the waiting time after an operation
command.
Setting the lower limit for
the speed matching
[bb-42] 0.00~590.00(Hz)
Starting at 0 Hz when the detected value is
equal to or less than the set value.
ON
ON
Operation
MC1
MC2
MC3
FW
Inverter
Output
frequency
CS
ON
ON
ON
Interlock time for MC2 and MC3
(0.5 to 1 s)
Operation
Operation with the frequency
matching
[bb-51] Retry waiting time
0.5~1s
Interlock time for MC2 and MC3 (0.5
to 1 s)
MC1
MC2
MC3
FW
Inverter
Output
frequency
CS
ON
ON
ON OFF
M
R
S
T
U
V
W
Ai1(10V)
L
FW
RV
CS
COM
AL1
AL0
AL2
THR
MC1
MC3
ELCB
FWY
RVY
CSY
MC2
H
R0
T0
Sample connection diagram for the commercial switching
operation and timing
NFB