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Mitsubishi Electric FR-F800 Series Instruction Manual page 82

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 Connection example with the FR-BR(-H) resistor unit
*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
A jumper is installed across terminals P/+ and P1. Do not remove the jumper 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 or 101" in Pr.30 Regenerative function selection.
Set "2" in Pr.0 Brake mode selection in the brake unit FR-BU2.
*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
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MCCB
Three phase AC
power supply
MCCB
MC
Three phase
AC power
supply
page
566.)
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T

MC
Motor
U
R/L1
S/L2
V
W
T/L3
Inverter
P1
P/+

N/-
10 m or less
∗2
T
ON
OFF
Motor
R/L1
U
V
S/L2
M
MC
T/L3
W
10 m
or less
∗1
P/+
P
N/-
N
P
∗3
PR
BUE
A
SD
B
C
Inverter
Brake unit
∗5
FR-BU2
ON
OFF
MC
MC
FR-BR

P
TH1
M
PR
TH2

FR-BU2
PR
A
P/+
B

N/-
C
BUE
SD

CR1
MC
∗4
CR1
∗3
P
TH1
PR
TH2
Resistor unit
MT-BR5
2. INSTALLATION AND WIRING
2.8 Connection of stand-alone option units
1
2
3
4
5
6
7
8
9
10
81

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