Mitsubishi Electric FR-F820-00046 Instruction Manual page 78

 Connection example with the FR-BR(-H) resistor unit
Three phase AC
power supply
*1 When wiring, make sure to match the terminal symbols (P/+, N/-) on the inverter and on the brake unit (FR-BU2). (Incorrect connection will
damage the inverter and brake unit.)
*2 When the power supply is 400 V class, install a stepdown transformer.
*3 The wiring distance between the inverter, brake unit (FR-BU2) and resistor unit (FR-BR) must be within 5 m. Even when the cable is twisted, the
wiring length must be within 10 m.
*4 The contact between TH1 and TH2 is closed in the normal status and is open at a fault.
*5 Terminal P3 is equipped in the FR-F820-00770(18.5K) to 01250(30K) and the FR-F840-00470(22K) to 01800(75K). Terminal P3 has the same
function as terminal P\+ on the inverter.
NOTE
• Do not remove the jumper across terminals P/+ and P1 except when connecting a DC reactor (FR-HEL).
 Connection example with the MT-BR5 type resistor unit
After making sure that the wiring is correct and secure, set "1" in Pr.30 Regenerative function selection.
Set "2" in Pr.0 Brake mode selection in the brake unit FR-BU2.
Three phase
AC power
supply
*1 When wiring, make sure to match the terminal symbols (P/+, N/-) on the inverter and on the brake unit (FR-BU2). (Incorrect connection will
damage the inverter and brake unit.)
*2 When the power supply is 400 V class, install a stepdown transformer.
*3 The wiring distance between the inverter, brake unit (FR-BU2) and resistor unit (FR-BR) must be within 5 m. Even when the cable is twisted, the
wiring length must be within 10 m.
*4 The contact between TH1 and TH2 is open in the normal status and is closed at a fault.
*5 The CN8 connector used with the MT-BU5 type brake unit is not used.
NOTE
• The warning "oL" of the stall prevention (overvoltage) does not occur while Pr.30 Regenerative function selection = "1".
(Refer to page 539.)
MCCB
MC
T ∗2
MCCB
MC
R/L1 U
V
S/L2
T/L3 W
P/+
N/-
Inverter
∗5
T ∗2
MC
Motor
U
R/L1
S/L2 V
M
W
T/L3
∗3
Inverter
P/+ (P3) ∗5
∗1
N/-
∗3
10 m or less
ON OFF CR1
Motor
M MC
MC
10 m
or less
∗1
P ∗3
P
N P
∗3
PR
BUE PR
A
SD
B
C
Brake unit Resistor unit
FR-BU2
2.8 Connection of stand-alone option units
ON OFF
MC
FR-BR
∗4
P TH1
PR
TH2
FR-BU2
PR
A
P/+
B
N/- C
BUE
SD
∗4
CR1
TH1
TH2
MT-BR5
2. INSTALLATION AND WIRING
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