Mitsubishi FR-F500 Instruction Manual page 36

( 2 ) Connection of the conventional BU brake unit (option)
Connect the BU brake unit correctly as shown below. Incorrect connection will damage the inverter.
Note: 1. The wiring distance between the inverter, brake unit and discharge resistor should be within
2m.
If twisted wires are used, the distance should be within 5m (16.40feet).
2. When the transistor in the brake unit fails, the brake transistor bacomes extremely hot and it has
a chance to get fire. Therefore, install a magnetic contactor on the inverter's power supply side to
shut off current in case of failure.
3. For the power supply of 400V class, install a voltage-reducing transformer.
(3) Connection of the FR-HC high power factor converter (option)
When connecting the high power factor converter (FR-HC) to suppress power harmonics, wire as shown
below. Wrong 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".
R
NFB
Power
supply
NFB MC
T (Note 3)
Brake unit
HC HB
S T
MC1 MC2 R4 S4
R4 S4
From FR-HCL02
R3 S3
MC2
External box
MC1
R2 S2
FR-HCL01
R S
INSTALLATION AND WIRING
Inverter
R L U
1
S L V
2
T L W
3
Remove jumpers.
P + N –
Discharge resistor
HA HB HC TB
P
PC
OCR
Constant-
voltage
power
-
supply
+
Comparator
BU brake unit
ON
OFF
MC
MC
High power factor converter (FR-HC)
N P Y1 or Y2
T4
T4
T3
T2
T
25
Motor
IM
PR
OCR
N
RDY RSO SE
R L
S L
T L
SD
RES
X10 (Note 3)
X11 (Note 3)
N –
P +
R1 L
S1 L
Inverter
1
(Note 1)
2
3
11
(Note 1)
21