Mitsubishi Electric FR-F700 Manual page 53

Name (type)
The brake unit and resistor unit are options that will fully exhibit the regenerative braking capability of the inverter. Use them as a set.
There are six different brake units as in the following table, from which make selection according to the deceleration time.
When the brake unit duty (%ED) excess and an alarm occur, errors appear in the inverter.
* To obtain a large braking torque, the motor has to have a torque characteristic
Outline dimension drawings
Brake unit
MT-BU5-(H) K
Resistor unit
MT-BR5-(H) K
Brake Unit Type
200V
class
400V
class
External connection diagram
Brake unit selection table
%ED at short-time rating when braking torque is 100%
75 90 110
Motor Capacity
kW kW kW
200V 75K 90K 110K
Inverter
400V 75K 90K 110K 132K 160K 185K 220K 280K 375K
MT-BU5-55K 5 --- --- --- ---
2
0
%ED
0
V
MT-BU5-110K 20 15 10
MT-BU5-H75K 10 5 --- ---
4
MT-BU5-H150K 40 25 20
0
MT-BU5-H220K %ED 80 60 40
0
MT-BU5-H280K - -- --- 80 65
V
MT-BU5-H375K - -- --- --- --- --- ---
Braking torque (%) at short-time rating
75 90 110
Motor Capacity
kW kW kW
200V 75K 90K 110K ------ ------ ------ ------ ------ ------
Inverter
400V 75K 90K 110K 132K 160K 185K 220K 280K 375K
2 MT-BU5-55K 70 60 50
braking
0
torque
0
(%)
V MT-BU5-110K 150 120 100 ------ ------ ------ ------ ------ ------
MT-BU5-H75K 100 80 70
4
MT-BU5-H150K 150 150 135
braking
0
MT-BU5-H220K torque 150 150 150 150 135
0
(%)
V MT-BU5-H280K 150 150 150 150 150 150
MT-BU5-H375K 150 150 150 150 150 150
that meets the braking torque.
Check the torque characteristic of the motor.
A
AA
AB
B BA
4 7
Mounting hole
L
P
L
C
N
P
CN8
A AA AB B BA
MT-BU5-55K 118 102 90 200 100 256.5 550 1740 1740
MT-BU5-110K 188 172 160 200 100 256.5 550 2000 2000
MT-BU5-H75K 118 102 90 200 100 256.5 550 1740 1740
MT-BU5-H150K 188 172 160 200 100 256.5 550 2000 2000
MT-BU5-H220K 258 242 230 200 100 256.5 550 2000 2000
MT-BU5-H280K 328 312 300 200 100 256.5 550 2330 2330
MT-BU5-H375K 398 382 370 200 100 256.5 550 2330 2330
Inverter
The wiring length should be 10m
maximum when wires are twisted
and 5m maximum when wires are
R/L1 U
not twisted.
S/L2 V IM
T/L3 W
TH1
P
P/+ P
PR
N/- PR
CN8
P
P
PR
PR
Cable provided with a brake unit
Brake unit
Resistor unit
MT-BU5
MT-BR5
Specifications, Structure, etc.
Brake unit and resistor unit combinations and
132 160 185 220 280 375
kW kW kW kW kW kW
--- --- --- -- - -- --- - -- --- - -- --- - -- --- -
200V
--- --- --- -- - -- --- - -- --- - -- --- - -- --- -
--- --- --- -- - -- --- - -- --- - -- --- - -- --- -
400V
--- --- --- -- - -- --- - -- --- - -- --- - -- --- -
10 5 5 -- --- - -- --- - -- --- -
25 15 10 10 5 -- --- -
40 30 20 15 10 5
80 50 40 20 15 10 (Caution 1) Be sure to select the well-ventilated place for installa-
132 160 185 220 280 375
kW kW kW kW kW kW
(Caution 2) The temperature rise of the discharging resistor is
------ ------ ------ ------ ------ ------
(Caution 3) The temperature of the resistor unit abnormally
55 45 40 35 25 20
110 90 80 70 50 40
* The resistor unit is provided with a thermostat (a contact) as
115 100 80 55
overheat protection. If this protective device is activated under
125 100 70
normal operation, it is assumed that the deceleration time is too
150 130 100
short. In such a case, increase the deceleration time setting of
the inverter.
P, PR terminal
2 M6 screw N
L
N
C
X-Y
Approx.
C Lc LP LN N X
mass
1 1.5 14
2 3.0 22
1 1.5 14
2 3.0 22
3 4.5 38
4 6.0 60
5 7.5 60
(Caution 1) For wiring of the brake unit and inverter, use
an accessory cable supplied with the brake
unit. Connect the main circuit cable to the ter-
TH2
minals P/+ and N/- and connect the control cir-
cuit cable to the connector (CN8) inside by
making cuts in the rubber bush at the top of
the inverter.
(Caution 2) The brake unit which uses multiple resistor
units has terminals equal to the number of
resistor units. Connect one resistor unit to one
pair of terminals (P, PR).
cables
Resistor unit
Brake Unit Type
type
MT-BU5-55K MT-BR5-55K
MT-BU5-110K 2×MT-BR5-55K
MT-BU5-H75K MT-BR5-H75K
MT-BU5-
2×MT-BR5-H75K
H150K
MT-BU5-
3×MT-BR5-H75K
H220K
MT-BU5-
4×MT-BR5-H75K
H280K
MT-BU5-
5×MT-BR5-H75K
H375K
tion of the resistor unit. Ventilation is necessary when
installing the resistor in a place, e.g. enclosure, where
heat is not well diffused.
300deg. Therefore, wire the cable so as not to touch
the resistor. In addition, separate the parts with low
heat resistance and the resistor by at least 40 to
50cm.
increases if the brake unit is operated exceeding the
specified duty. Since the resistor unit may result in
overheat if the temperature of the brake unit is left
unchanged, switch off the inverter.
NP
TH2
M4
M6
P PR TH1 E
193 189
37 60 10 21
480
510
75 300 75
4 15
7.5 450
Mounting hole
Resistor unit Resistance
Y Z
type value
12 8
200V
class MT-BR5-55K 2.0Ω
12 8
MT-BR5-
12 8 400V
6.5Ω
class
H75K
12 8
12 8
12 10
12 10
Brake unit
Inverter
Cable
2
14mm
2
2×14mm
2
14mm
2
2×14mm
2
3×14mm
2
4×14mm
2
5×14mm
mass
50kg
70kg
54