Connection Of The Brake Unit (Bu Type); Connection Of The High Power Factor Converter (Fr-Hc/Mt-Hc) - Mitsubishi Electric FR-A720-00030-NA Instruction Manual

2.5.4

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-PC and terminals TB-HC of the brake unit and fit it to across terminals PC-TB.
MCCB
Three-phase
AC power
supply
*1 When the power supply is 400V class, install a step-down transformer.
*2 For capacity FR-A720-00330 (FR-A740-00170) or lower, remove the jumper across terminals PR and PX.
CAUTION
 The wiring distance between the inverter, brake unit and resistor unit should be within 2m (6.56feet). If twisted wires are used,
the distance should be within 5m(16.4feet).
 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 configure a circuit so that a current is shut off in case of fault.
 Do not remove a jumper across terminal P/+ and P1 except when connecting a DC reactor.
2.5.5

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 211.)
(1) Connection with the FR-HC (FR-A720-02150 (FR-A740-01100) or less)
After making sure the wiring is correct, set the following parameters.
Pr. 19 Base frequency voltage (under V/F control) or Pr. 83 Rated motor voltage (under a control method other than V/F
control) = "rated motor voltage"
Pr. 30 Regenerative function selection = "2"
MCCB MC
Power
supply
*1 Remove the jumpers across the inverter terminals R/L1 and R1/L11, S/L2 and S1/L21, and connect the control circuit power supply to the R1/L11
and S1/L21 terminals. Always keep the power input terminals R/L1, S/L2, T/L3 open. Incorrect connection will damage the inverter. (E.OPT
(option alarm) will occur. (Refer to page 420.))
*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 235)
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 213.)
*4 Always connect the terminal RDY (of FR-HC) to a terminal where the X10 or MRS signal is assigned in the inverter. Always connect the terminal
SE (of FR-HC) to the terminal SD (of the inverter). Not doing so may damage FR-HC.
CAUTION
 The voltage phases of terminals R/L1, S/L2, T/L3 and terminals R4, S4, T4 must be matched.
 Use sink logic (factory 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 the jumper across P/+ and P1.
T*
1
Inverter
MC
U
R/L1
S/L2
W
T/L3
N/-
PR
P/+
*2
PX
Outside box
(FR-HCB)
MC1
MC2
Reactor1
(FR-HCL01)
R R2 R2 R3
S3
S S2 S2
T3
T T2 T2
Connection of stand-alone option units
ON
MC
MC
Motor
IM
V
Brake unit
(BU type)
N
OCR
Discharging
OCR
resistor
PR
P
High power factor converter
(FR-HC)
MC1
MC2
Reactor2
(FR-HCL02)
R3 R4 R4 P
S3 S4 S4 N
*4
T3 T4 T4 Y1orY2
RDY
RSO
SE
phase
detection
T
OFF
Remove the
jumper
TB
HC
HB
HA
PC
Fit a jumper
Inverter
Motor
R/L1 U
IM
S/L2 *1 V
T/L3 W
P/+
*2
N/-
X11
*3
X10
*3
RES
SD
R1/L11
*1
S1/L21
47
2