Mitsubishi Electric FR-F800, Instruction Manual

Page: 490 / 834

(A) Application parameters Parameters
5 - 328
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, commer-
cial 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.
Connection diagram
●
A typical connection diagram of the electronic bypass sequence is shown below.
I003096E
Fig. 5-145: Electronic bypass sequence connection diagram (Standard models)
I003097E
Fig. 5-146: Electronic bypass sequence connection diagram (Separated converter type)
MC1
R/L1
S/L2
T/L3
STF
R1/L11
S1/L21
CS
MRS
RES
SD
10
2
5
U
V
W
IM
MC1
MC2
SE
MC3
MC2
MC1
MC3
OH
MCCB
MC2
MC3
MC2
MC3
Inverter start
(forward rotation)
Inverter/bypass
operation interlock
External thermal
Frequency
setting signal
External
thermal relay
24 V DC
IM
Standard models
Reset
MC1
R/L1
S/L2
R1/L11
S1/L21
T/L3
STF
R1/L11
S1/L21
P/+
N/-
CS
RH(MRS)
MRS(X10) RDA
10
2
5
U
V
P/+
N/-
W
IM
MC1
MC2
SE
MC3
MC2
MC1
MC3
MCCB
MC2
SD SE
MC3
MC2
MC3
ALM
Y214
X95
X96
RES
RSO
RES
SD
OH
Inverter start
(forward rotation)
Inverter/bypass
operation interlock
Frequency
setting signal
External
thermal relay
24 V DC
Inverter
Separated converter type
Converter unit
External
thermal
Reset