Mitsubishi F700 Series User Manual

33
Connection of stand-alone option units
2
WIRING
2.4.2 Connection of the brake unit (FR-BU/MT-BU5)
When connecting the brake unit (FR-BU(H)/MT-BU5) to improve the brake capability at deceleration, make connection
as shown below.
(1) Connection with the FR-BU (01160 or less)
(2) Connection with the MT-BU5 (01800 or more)
After making sure that the wiring is correct, set "1" in Pr.30 Regenerative function selection. (Refer to page 108)
*1 Connect the inverter terminals (P/+, N/-) and brake unit (FR-BU (H)) terminals so that their terminal signals match
with each other. (Incorrect connection will damage the inverter.)
*2 When the power supply is 400V class, install a step-down transformer.
*3 The wiring distance between the inverter, brake unit (FR-BU) and resistor unit (FR-BR) should be within 5m. If
twisted wires are used, the distance should be within 10m.
CAUTION
 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 input 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.
*1 When the power supply is 400V class, install a step-down transformer.
*2 The wiring length between the resistor unit and brake resistor should be 10m maximum when wires are
twisted and 5m maximum when wires are not twisted.
CAUTION
 Install the brake unit in a place where a cooling air reaches the brake unit heatsink and within a distance of the cable supplied
with the brake unit reaches the inverter.
 For wiring of the brake unit and inverter, use an accessory cable supplied with the brake unit. Connect the main circuit cable to
the inverter terminals P/+ and N/- and connect the control circuit cable to the CN8 connector inside by making cuts in the
rubber bush at the top of the inverter for leading the cable.
 The brake unit which uses multiple resistor units has terminals equal to the number of resistor units. Connect one resistor unit
to one pair of terminal (P, PR).
U
V
W
P/+
N/−
R/L1
S/L2
T/L3
Motor
IM
Inverter
PR
N/−
P/+
P
HA
HB
HC
FR-BU
FR-BR
TH2
TH1
PR
*1 *1
Three-phase AC
power supply
MCCB
MC
OFFON
MC
T *2
MC
*3
5m or less
MC
R/L1
Motor
IM
Inverter
Brake unit
MT-BU5
Resistor unit
MT-BR5
S/L2
T/L3
U
V
P/+
N/
P
PR
P
PR
P
PR
P
TH1
TH2
PR
CN8
W
Three-phase
AC power
supply
MCCB
TH1
TH2
MC
OFFON
MC
CR1 CR2
CR1
CR2
T *1
5m or
less
*2

Mitsubishi F700 Series Specifications

General

Humidity	95% RH or less (non-condensing)
Control Method	V/F control
Protection Features	Overcurrent, overvoltage, undervoltage, overheat, short circuit
Communication Options	RS-485
Operating Temperature	-10°C to +50°C
Storage Temperature	-20°C to +65°C
Altitude	Up to 1000m above sea level
Overload Capacity	150% for 60 seconds
Cooling Method	Forced air cooling
Power Range	0.75 to 630 kW (1 to 845 hp)
Output Voltage	3-phase 200 to 240 VAC, 380 to 500 VAC (matching input voltage)