Connection Of Stand-Alone Option Units; Connection Of The Conventional Bu Brake Unit (Option); Connection Of The Fr-Hc High Power Factor Converter (Option) - Mitsubishi Electric FR-C500 Instruction Manual

1.11 Connection of Stand-Alone Option Units

1.11.1

Connection of the conventional BU brake unit (option)

Connect the BU brake unit correctly as shown below. Incorrect connection will damage
the inverter.
NFB
Remove
jumpers.
CAUTION
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.
2. If the transistors in the brake unit should fail, the resistor can be extremely
hot, causing a fire. Therefore, install a magnetic contactor on the inverter's
power supply side to shut off a current in case of failure.
1.11.2

Connection of the FR-HC high power factor converter (option)

When connecting the high power factor converter (FR-HC) to suppress power
harmonics, wire securely as shown below. Incorrect connection will damage the high
power factor converter and inverter.
R S T
NFB
Power
supply
MC
ON
OFF
MC
PC HA HB HC TB
OCR
High power factor converter (FR-HC)
R4 S4 T4
MC1 MC2
R4 S4 T4
From FR-HCL02
R3 S3 T3
MC2
External box
MC1
R2 S2 T2
FR-HCL01
R
S T

Connection of Stand-Alone Option Units

MC
Inverter
U
R
V
S
W
T
P
N
Discharge resistor
P PR
BU brake unit
N P
Y1orY2 RDY
33
Motor
IM
N
OCR
Inverter
R
RSO SE
S (Note 1)
T
SD
RES (Note 3)
MRS (Note 3)
N
P
1