Mitsubishi Electric FR-A700 Manual page 79

Name (type)
A brake unit and resistor unit are options that will fully exhibit the regenerative braking capability of the inverter and are always used as a
set.
There are six different brake units as in the following table, from which make selection according to the necessary braking torque and
deceleration time.
The brake unit is equipped with a seven-segment LED that displays the duty (%ED) and alarm.
Brake unit selection table
%ED at short-time rating when braking torque is 100%
Motor Capacity
Inverter
FR-BU-15K
FR-BU-30K
FR-BU-55K
FR-BU-H15K
FR-BU-H30K
FR-BU-H55K
Braking torque (%) at short-time rating when 10%ED is 15s
Motor Capacity
Inverter
FR-BU-15K
FR-BU-30K
FR-BU-55K
FR-BU-H15K
FR-BU-H30K
FR-BU-H55K
Outline dimension
FR-BU-15K
FR-BU-30K
FR-BU-55K
Brake unit FR-BU-H15K
FR-BU-H30K
FR-BU-(H) K
FR-BU-H55K
Resistor unit
FR-BR-(H) K
Brake unit and resistor unit combinations and used wires
Brake Unit Type
Use the wires of the above recommended size or larger.
Connection example
Three-phase AC
power supply
*1. Connect the inverter terminals (P, N) and brake unit (FR-BU (H)) terminals so that their
terminal signals match with each other. (Incorrect connection will damage the inverter.)
*2. When the power supply is 400V class, install a step-down transformer.
*3. Be sure to remove a jumper across terminal PR-PX when using the FR-BU with the inverter of
7.5K or less.
5.5kW 7.5kW 11kW 15kW 18.5kW 22kW 30kW 37kW 45kW 55kW
200V 5.5K 7.5K 11K
400V
5.5K 7.5K 11K
80 40
-- - - - - - - - - - -
%ED
-- - - - - - - - - - -
80 40
-- - - - - - - - - - -
%ED
-- - - - - - - - - - -
5.5kW 7.5kW 11kW 15kW 18.5kW 22kW 30kW 37kW 45kW 55kW
200V 5.5K 7.5K 11K
400V
5.5K 7.5K 11K
280 200 120
-- - - - - - - - - - - 260
-- - - - - - - - - - -
280 200 120
-- - - - - - - - - - - 260
-- - - - - - - - - - -
Brake Unit
Type W H D
100 240 128
160 240 128
265 240 128
160 240 128
160 240 128
265 240 128
Resistor Unit Type
FR-BU-15K FR-BR-15K
FR-BU-30K FR-BR-30K
FR-BU-55K FR-BR-55K
FR-BU-H15K FR-BR-H15K
FR-BU-H30K FR-BR-H30K
FR-BU-H55K FR-BR-H55K
MCCB
R/L1
S/L2
T/L3
Inverter
PR
*2
PX
N/−
Specifications, Structure, etc.
15K 18.5K 22K 30K
15K 18.5K 22K 30K
15 10 - - -- - - - - - -- - - -- - - -
65 30 25 15 10
- - - -- - - -- - - - 90 60 30
15 10 - - -- - - - - - -- - - -- - - -
65 30 25 15 10
- - - -- - - -- - - - 90 60 30
15K 18.5K 22K 30K
15K 18.5K 22K 30K
100 80 70 - -- - - -
180 160 130 100
- - - -- - - -- - - - 300 250 180
100 80 70 - -- - - -
180 160 130 100
- - - -- - - -- - - - 300 250 180
Resistor Unit
Type W H
FR-BR-15K 170 450
FR-BR-30K 340 600
FR-BR-55K 480 700
FR-BR-H15K 170 450
FR-BR-H30K 340 600
FR-BR-H55K 480 700
Wire (P/+-P/+, N-N/-, (Note) 1.The maximum temperature rise of the resistor unit is
P/+-P, PR-PR) 100°C. Therefore, use heat-resistant wires (such as
glass wires).
2
3.5mm
2
5.5mm
2
14mm
2
3.5mm
2
3.5mm
2
5.5mm
ON OFF
MC
MC
FR-BR
Motor
U
P TH1
V
IM
PR
W
TH2
FR-BU
PR
HA
P/+
HB
*1
N/−
HC
*3
5m or less
37K 45KK 55K
37K 45KK 55K
- - - - - - - - - - -- - - -- - -
- - - - - - - - - - -- - - -- - -
20 15 10
- - - - - - - - - - -- - - -- - -
- - - - - - - - - - -- - - -- - -
20 15 10
37K 45KK 55K
37K 45KK 55K
- - - - - - - - - - -- - - -- - -
80 70 - - -- - -
150 120 100
- - - - - - - - - - -- - - -- - -
80 70 - - -- - -
150 120 100
Resistor unit
D
D
220
220
450
220 Brake unit
220
H
450
W
W
*4
Inverter
FR-BU FR-BR
P/+
P/+ P P
N/-
N/- PR PR
Within Within
5m 5m
Inverter
FR-BU
Twist Twist
P/+ P/+ P
N/- N/- PR
Within 10m Within 10m
Minimize the cable length between the inverter
and brake unit and the resistor unit and brake
unit. Use a twisted cable when the wiring length
exceeds 5m. (If twisted wires are used, the
distance should be within 10m.) Use the wires of
the above recommended size or larger.
H
D D
FR-BR
P
PR
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