Mitsubishi FR-A800

(A) Application parameters
PARAMETERS
465
5
GROUP
A
Electronic bypass sequence function
• When operating the motor at 60 Hz (or 50 Hz), the motor can be more efficiently operated with a commercial power supply.
In addition, if the motor cannot be stopped for a long period of time even for an inverter maintenance and inspection, it is
recommended that a commercial power supply circuit be installed.
• When switching between inverter operation and commercial power supply operation, commercial power supply may be
accidentally applied to the output side of the inverter. To avoid such situation, provide an interlock where the magnetic
contactor at the commercial power supply side turns ON at turn OFF of the magnetic contactor at the inverter output side.
The inverter's electronic bypass sequence that outputs timing signals for the magnetic contactors can act as a complicated
interlock between the commercial power supply operation and the inverter operation.
NOTE
• The commercial power supply operation is not available with Mitsubishi vector control dedicated motors (SF-V5RU).
Connection diagram
• A tipical connection diagram of the electronic bypass sequence is shown below.
Standard models and IP55 compatible models
Separated converter type
Inverter start
(forward rotation)
MC1
R/L1
S/L2
T/L3
STF
R1/L11
S1/L21
CS
MRS
RES
SD
10
2
5
U
V
W
External
thermal relay
IM
MC1
MC2
SE
∗1
∗1
∗1
∗2
MC3
MC2
24VDC
MC1
External thermal
Frequency
setting signal
MC3
Inverter/bypass
operation interlock
∗3
OH
MCCB
MC2
MC3
MC2
MC3
Reset
Inverter start
(forward rotation)
MC1
R/L1
S/L2
R1/L11
S1/L21
T/L3
STF
R1/L11
S1/L21
P/+
N/-
CS
MRS
X10RDA
10
2
5
U
V
P/+
N/-
W
External
thermal relay
InverterConverter unit
IM
MC1
MC2
SE
∗1
∗1
∗1
∗2
MC3
MC2
24VDC
MC1
Frequency
setting signal
MC3
Inverter/bypass
operation interlock
∗3
MCCB
MC2
SD
SE
MC3
MC2
MC3
ALM
Y214
X95
X96
RES
RSO
∗4
∗4
∗3
∗3
RES
SD
External
thermal
OH
Reset