Instruction manual

INSTALLATION AND WIRING
26
(
3
)
Connection of the conventional BU brake unit (option)
Connect the BU brake unit correctly as shown on the right. Incorrect connection will damage the inverter.
MC
R 〈L
1
〉
S 〈L
2
〉
T
〈
L
3
〉
U
V
W
IM
Inverter
HCHBHA TB
HC HB
ON
MC
MC
OFF
P 〈+〉 N 〈–〉
P
OCR
PR
OCR
N
NFB
PC
Brake unit
Remove jumpers.
Discharge resistor
Constant-voltage
power supply
BU brake unit
Comparator
Motor
T (Note 4)
+
-
Note: 1. For models 7.5K or less, remove the jumper across terminals PR-PX.
2. The wiring distance between the inverter, brake unit and discharge resistor should be within
2m (6.56 feet).
If twisted wires are used, the distance should be within 5m (16.40 feet).
3. If the transistors in the brake unit should fail, the resistor will be extremely hot, causing a fire.
Therefore, install a magnetic contactor on the inverter's power supply side to shut off current in
case of failure.
4. For the power supply of 400V class, install a voltage-reducing transformer.
(
4
)
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".
X10 (Note 3)
X11 (Note 3)
N
〈
–
〉
P 〈+〉
R1
〈
L
11
〉
S1 〈L
21
〉
RES
SD
T
〈
L
3
〉
S 〈L
2
〉 (Note 1)
R 〈L
1
〉
NFB
R S T R4 S4 T4 N P Y1 or Y2 RDY RSO SE
Inverter
(FR-A500)
(Note 1)
High power factor converter
From FR-HCL02
Power
supply