Connection Of The Brake Unit (Bu Type); Connection Of The High Power Factor Converter (Fr-Hc/Mt-Hc) - Mitsubishi Electric FR-F720P-0.75K to 110K Instruction Manual

Fr-f700p series
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Connection of stand-alone option units
2.4.3

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.
MCCB
Three-phase
AC power
supply
*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.
2.4.4

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 page 125.)
(1) Connection with the FR-HC (55K or lower)
MC
MCCB
Three-phase
AC power
supply
*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 318.))
*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 page 133.)
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 page 125.)
*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.
38
T*
1
Inverter
MC
R/L1
S/L2
T/L3
Outside box
(FR-HCB)
MC1
MC2
Reactor1
(FR-HCL01)
R
R2
R2
S2
S2
S
T
T2
T2
MC
Motor
U
V
M
Brake unit
W
N/-
N
P/+
Discharging
OCR
resistor
PR
P
High power factor converter
(FR-HC)
MC1
MC2
Reactor2
(FR-HCL02)
R3
R3
R4
R4
S3
S3
S4
S4
T3
T3
T4
T4
Y1orY2
RDY
RSO
R
phase
S
detection
T
ON
OFF
MC
Remove the
(BU type)
jumper
TB
HC
OCR
HB
HA
PC
Fit a jumper
Inverter
Motor
R/L1
U
S/L2
V
*1
W
T/L3
P
P/+
*2
N
N/-
X11
*3
*4
X10
*3
RES
SE
SD
R1/L11
*1
S1/L21
M

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