Hitachi SJ Series User Manual page 376

Chapter 12
Switching to the Commercial Operation (Bypass
Mode)
A
• When the [PA-04] bypass function selection is set
to 01: Enabled, switching to the commercial
operation mode (bypass mode) is allowed if the
specified operation mode is not entered during the
forced operation.
• In the bypass mode, [EMBP] bypass mode signal
(output terminal: 076) is turned on and the inverter
output is shut off.
• For the behavior in the bypass mode, refer to the
following sample connection diagram for the
commercial switching operation and timing.
• Perform the contactor control based on the [EMBP]
bypass mode signal (output terminal: 076).
Example of timing from INV to the commercial
operation
Inverter output
Operation
EMBP
MC1 ON
MC2
ON
MC3
Parameter Setting
Item
Commercial power
supply bypass
function selection
Bypass function
delay time
Output Terminal Setting
Item
Selecting the output
terminal
NFB
ON
Interlock time for MC2 and MC3
(0.5 to 1 s)
ON
Parameter Data
00
[PA-04]
01
[PA-05] 0.0~1000.0(s)
Parameter Data
[CC-01]~
076
[CC-07]
!
• For using the bypass mode, it is necessary to
implement a interlock taking into consideration the
operation delay of the contactor when shifting to
the commercial operation. •Make sure that the
system operation is safe in using the mode.
• The timing of the contactor control can be taken
using the [EMBP] bypass mode signal (output
terminal: 076) as the contactor control signal. Take
a interlock between the contactor on the
commercial power supply side and that on the
inverter output side.
• 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.
Sample connection diagram when shifting to the commercial operation and timing
MC2
ELCB
MC1
R
S
T
R0
T0
H
Ai1(10V)
L
FW FW
RV
RV
COM
Disabled
Enabled
Set the delay time until the bypass mode operation.
[EMBP] bypass mode signal.
OFF: Disabled
ON: In the bypass mode
12-17-15
Inverter Functions
THR
MC3
U
V
M
W
AL0
AL1
AL2
EMBP
16a
To the contactor control
16c
circuit
Description
Description