Mitsubishi FR-A846-00023, Инструкция по эксплуатации

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Connection of stand-alone option units
64
INSTALLATION AND WIRING
2.11.3
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
jumpers across terminals HB and PC and terminals TB and HC of the brake unit and fit one across terminals PC and TB.
The BU type is compatible with the FR-A846-01800(55K) or lower.
NOTE
• The wiring distance between the inverter and brake unit (BU type), and between the brake unit (BU type) and discharging
resistor must be within 2 m. Even when the cable is twisted, the wiring length must be within 5 m.
• If the transistors in the brake unit should becomes faulty, the resistor will overheat and result in a fire. Install a magnetic
contactor on the inverter's input side and configure a circuit that shut off the current in case of a fault.
• Remove the jumper across terminals P/+ and P1.

Install a stepdown transformer.
U
V
W
Motor
M
Inverter
Brake unit
(BU type)
Discharging
resistor
R/L1
S/L2
T/L3
N/-
P/+
Three-phase
AC power
supply
MCCB
MC
P
PR
OCR
N
Fit a jumper
Remove the
jumper
HC
HB
HA
TB
OCR
PC
MC
OFF ON
MC
T ∗1