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Connection of stand-alone option units
2.5.3 Connection of the brake unit (BU type)
Connect the brake unit (BU type) correctly as shown below. Incorrect connection will damage the inverter. Remove the jumper
across terminals HB and PC and terminals TB and HC of the brake unit and fit it to across terminals PC and TB.
2.5.4 Connection of the high power factor converter (FR-HC/MT-HC)
When connecting the high power factor converter (FR-HC/MT-HC) to suppress power harmonics, perform wiring securely as
shown below. Incorrect connection will damage the high power factor converter and inverter.
After making sure that the wiring is correct, set "2" in Pr. 30 Regenerative function selection. (Refer to Chapter 4 of the Instruction
Manual (Applied).)
(1) Connection with the FR-HC (55K or lower)
*1 When the power supply is 400V class, install a step-down transformer.
CAUTION
⋅ The wiring distance between the inverter, brake unit and discharging resistor should be within 2m. If twisted wires are used, the
distance should be within 5m.
⋅ If the transistors in the brake unit should become faulty, the resistor can be unusually hot, causing a fire. Therefore, install a
magnetic contactor on the inverter's power supply side to shut off a current in case of fault.
⋅ Do not remove a jumper across terminal P/+ and P1 except when connecting a DC reactor.
*1 Remove the jumpers across the inverter terminals R/L1 and R1/L11 and terminals S/L2 and S1/L21, and connect the control circuit power supply
to the R1/L11 and S1/L21 terminals. Do not connect anything to the power input terminals R/L1, S/L2, and T/L3. Incorrect connection will damage
the inverter. (E.OPT (option fault) will occur. (Refer to page 127.))
*2 Do not insert the MCCB between terminals P/+ and N/- (P/+ and P/+, N/- and N/-). Opposite polarity of terminals N/-, P/+ will damage the inverter.
*3 Use Pr. 178 to Pr. 189 (input terminal function selection) to assign the terminals used for the X10 (X11) signal. (Refer to Chapter 4 of the Instruction
Manual (Applied).)
For communication where the start command is sent only once, e.g. RS-485 communication operation, use the X11 signal when making setting to
hold the mode at occurrence of an instantaneous power failure. (Refer to Chapter 4 of the Instruction Manual (Applied).)
*4 Be sure to connect terminal RDY of the FR-HC to the X10 signal or MRS signal assigned terminal of the inverter, and connect terminal SE of the
FR-HC to terminal SD of the inverter. Without proper connecting, FR-HC will be damaged.
CAUTION
⋅ The voltage phases of terminals R/L1, S/L2, T/L3 and terminals R4, S4, T4 must be matched.
⋅ Use sink logic (initial setting) when the FR-HC is connected. The FR-HC cannot be connected when source logic is selected.
⋅ Do not connect a DC reactor to the inverter when FR-HC is connected.
⋅ Do not remove a jumper across terminal P/+ and P1.
U
V
W
M
Brake unit
(BU type)
Discharging
resistor
R/L1
S/L2
T/L3
N/-
P/+
MC
P
PR
OCR
N
Remove the
jumper
Fit a jumper
HC
HB
HA
TB
OCR
PC
MC
OFFON
MC
T*1
Three-phase
A
C power
supply
MCCB
Inverter
Motor
Inverter
Outside box
Three-phase
A
C power
supply
MCCB
High power factor converter
(FR-HC)(FR-HCB)
Reactor2
(FR-HCL02)
R/L1
Reactor1
(FR-HCL01)
phase
detection
S/L2
T/L3
P/+
N/-
X11
*3
X10
*3
RES
U
V
W
P
N
Y1orY2
RDY
RSO
MC1
MC2
R4
S4
T4
R
S
T
R4
S4
T4
R3
S3
T3
R3
S3
T3
R2
S2
T2
R2
S2
T2
R
S
T
MC1
MC2
SD
SE
R1/L11
S1/L21
MC
*1
*1
*2
*4
Moto
r
M