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Connection of stand-alone option units
2
WIRING
2.4.6 Connection of the power regeneration converter (MT-RC)
(FR-F720-03160 (FR-F740-01800) or more)
When connecting a power regeneration converter (MT-RC), perform wiring securely as shown below. Incorrect
connection will damage the regeneration converter and inverter. After connecting securely, set "1" in
Pr. 30 Regenerative function selection and "0" in Pr. 70 Special regenerative brake duty.
CAUTION
⋅
When using the FR-F700 series together with the MT-
RC, install a magnetic contactor (MC) at the input side of
the inverter so that power is supplied to the inverter after
1s or more has elapsed after powering ON the MT-RC.
When power is supplied to the inverter prior to the MT-
RC, the inverter and the MT-RC may be damaged or the
MCCB may trip or be damaged.
⋅ Refer to the MT-RC manual for precautions for
connecting the power coordination reactor and others.
♦ Parameters referred to
Pr. 30 Regenerative function selection Refer to page 114
Pr. 70 Special regenerative brake duty Refer to page 114
DCL
P1
P1
R/L1
S/L2
T/L3
R1/L11
S1/L21
R
S
T
R
S
T
R1
S1
R2
S2
T2
R2
S2
T2
RES
STF
SD
C
B
A
U
V
W
Inverter
MT-RCL
P
P/+
N/
P
N
RDY
SE
MT-RC
Reset signal
Alarm signal
Ready signal
Three-phase
A
C power
supply
MCCB
MC2
IM
MC1
MT-RC power supply (MC1)
Inverter input power supply (MC2)
ON
ON
1s or more