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2.10.3 Connection of the power regeneration converter
(MT-RC)
When connecting the power regeneration converter (MT-RC), perform wiring securely as follows. Incorrect connection will
damage the power regeneration converter and the inverter. After making sure that the wiring is correct and secure, set "1" in
Pr.30 Regenerative function selection.
MCCB
Three-phase
AC power
supply
*1
For the FR-A842-08660(355K) or lower, up to two cables can be connected to terminals P/+ and N/-. For the FR-A842-09620(400K) or
higher, up to four cables can be connected. To use more cables, use a bus bar.
NOTE
• When using the inverter 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 one second 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 be shut off or damaged.
• When connecting the power coordination reactor and others, refer to Instruction Manual of the MT-RC for precautions.
MC2
MC1
MT-RCL
R
R2
S
S2
T
T2
Inverter input power supply (MC2)
MT-RC power supply (MC1)
Inverter / converter unit
U
R/L1
M
V
S/L2
W
T/L3
R1/L11
S1/L21
P/+
N/-
∗1
Reset signal
P
N
RES
R2
STF
S2
SD
T2
C
B
R
A
S
RDY
T
R1
Ready signal
SE
S1
MT-RC
ON
ON
1s or more
2. INSTALLATION AND WIRING
2.10 Connection of stand-alone option units
1
2
3
4
5
6
7
Alarm signal
8
9
10
73
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