Mitsubishi Electric 800 Series Instruction Manual page 64

Connection example with the FR-BR-(H) resistor unit
Three phase AC
power supply




NOTE
• Do not remove the jumper across terminals P/+ and P1.
Connection example with the MT-BR5 type resistor unit
After wiring securely, set Pr.30 Regenerative function selection = "1" and Pr.70 Special regenerative brake duty = "0
(initial value)".
Set Pr.0 Brake mode selection = "2" in the brake unit FR-BU2.
Three phase
AC power
supply





NOTE
• The stall prevention (overvoltage), oL, does not occur while Pr.30 Regenerative function selection = "1 or 101" and Pr.70
Special regenerative brake duty = "0% (initial value)". (Refer to the FR-A800 Instruction Manual (Detailed).)
MCCB
MC
When wiring, make sure to match the terminal symbol (P/+, N/-) at the inverter side and at the brake unit
(FR-BU2) side. (Incorrect connection will damage the inverter and brake unit.)
Install a stepdown transformer.
The wiring distance between the inverter and brake unit (FR-BU2), and between the brake unit (FR-BU2)
and resistor unit (FR-BR) must be within 5 m. Even when the wires are twisted, the cable length must be
within 10 m.
The contact between TH1 and TH2 is closed in the normal status and is open at a fault.
MCCB
MC
R/L1
S/L2
T/L3
Inverter
When wiring, make sure to match the terminal symbol (P/+, N/-) at the inverter side and at the brake unit
(FR-BU2) side. (Incorrect connection will damage the inverter and brake unit.)
Install a stepdown transformer.
The wiring distance between the inverter and brake unit (FR-BU2), and between the brake unit (FR-BU2)
and resistor unit (MT-BR5) must be within 5 m. Even when the wire is twisted, the cable length must be
within 10 m.
The contact between TH1 and TH2 is open in the normal status and is closed at a fault.
The CN8 connector used with the MT-BU5 type brake unit is not used.
Connection of stand-alone option units
T ∗2
MC
FR-BR
Motor
U
R/L1
P
S/L2 V
M
PR
W
T/L3
∗3
FR-BU2
Inverter
PR
P/+
P/+
∗1
N/- N/-
BUE
SD
∗3
10m or less
∗2
T
ON OFF CR1
Motor
U
V
M
MC
W
10m
or less
∗1
∗3
P/+ P
N/- N P
∗3
PR
BUE
A
SD
B
C
Brake unit
∗5
FR-BU2
INSTALLATION AND WIRING
ON OFF
MC
∗4
TH1
TH2
A
B
C
MC
∗4
CR1
P TH1
PR
TH2
Resistor unit
MT-BR5
2
63