Mitsubishi Electric FR-F820-00046, Инструкция по эксплуатации

Страница: 103 / 940

Installation and wiring Connection of stand-alone option units
FR-F800 2 - 75
2.8.3 Connection of the brake unit (BU type)
Connect the brake unit (BU type) correctly as shown below. Incorrect connection will damage the in-
verter. 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 FR-F820-02330(55K) or lower and FR-F840-01160(55K) and lower.
When the power supply is 400 V class, install a stepdown transformer.
I002411E_B
Fig. 2-52: Connection with the brake unit BU
NOTES 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 each. 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 only when connecting a DC reactor (FR-HEL).
U
V
W
M
R/L1
S/L2
T/L3
N/-
P/+
MCCB
MC
P
PR
OCR
N
HC
HB
HA
TB
OCR
PC
MC
MC
T
Three-
phase AC
power
supply
Brake unit
(BU type)
Remove the
jumper
Fit a jumper
Motor
Inverter
ON OFF
Discharging
resistor