Mitsubishi Electric FR-A720-0.4K Specifications Page 80
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83
Brake unit
MT-BU5-(H)K
Resistor unit
MT-BR5-(H)K
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.
Outline dimension drawings
External connection diagram
Name (type) Specifications, Structure, etc.
Brake unit selection table
%ED at short-time rating when braking torque is 100%
Motor Capacity
75
kW
90
kW
110
kW
132
kW
160
kW
185
kW
220
kW
280
kW
375
kW
Inverter
200V 75K 90K
110K
------ ------ ------ ------ ------ ------
400V 75K 90K
110K
132K 160K 185K 220K 280K 375K
Brake unit
2
0
0
V
MT-BU5-55K
%ED
5 ------ ------ ------ ------ ------ ------ ------ ------
M T - B U 5 - 1 1 0 K 2 0 1 5 1 0 ------ ------ ------ ------ ------ ------
4
0
0
V
MT-BU5-H75K
%ED
1 0 5 ------ ------ ------ ------ ------ ------ ------
MT-BU5-H150K 40 25 20 10 5 5 ------ ------ ------
MT-BU5-H220K 80 60 40 25 15 10 10 5 ------
MT-BU5-H280K ------ 80 65 40 30 20 15 10 5
MT-BU5-H375K ------ ------ ------ 80 50 40 20 15 10
Braking torque (%) at short-time rating when 100% ED is 15s
Motor Capacity
75
kW
90
kW
110
kW
132
kW
160
kW
185
kW
220
kW
280
kW
375
kW
Inverter
200V 75K 90K
110K
------ ------ ------ ------ ------ ------
400V 75K 90K
110K
132K 160K 185K 220K 280K 375K
Brake unit
2
0
0
V
MT-BU5-55K
braking
torque
(%)
70 60 50 ------ ------ ------ ------ ------ ------
MT-BU5-110K 150 120 100 ------ ------ ------ ------ ------ ------
4
0
0
V
MT-BU5-H75K
braking
torque
(%)
100 80 70 55 45 40 35 25 20
MT-BU5-H150K 150 150 135 110 90 80 70 50 40
MT-BU5-H220K 150 150 150 150 135 115 100 80 55
MT-BU5-H280K 150 150 150 150 150 150 125 100 70
MT-BU5-H375K 150 150 150 150 150 150 150 130 100
* To obtain a large braking torque, the motor has to have a torque characteristic
that meets the braking torque.
Check the torque characteristic of the motor.
Brake unit and resistor unit combinations and
cables
(Caution 1) Be sure to select the well-ventilated place for installa-
tion of the resistor unit. Ventilation is necessary when
installing the resistor in a place, e.g. enclosure, where
heat is not well diffused.
(Caution 2) The temperature rise of the discharging resistor is
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.
(Caution 3) The temperature of the resistor unit abnormally
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.
* The resistor unit is provided with a thermostat (a contact) as
overheat protection. If this protective device is activated under
normal operation, it is assumed that the deceleration time is too
short. In such a case, increase the deceleration time setting of
the inverter.
Brake Unit Type
Resistor Unit
Type
Cable
200V
MT-BU5-55K MT-BR5-55K
14mm
2
MT-BU5-110K 2×MT-BR5-55K
2×14mm
2
400V
MT-BU5-H75K MT-BR5-H75K
14mm
2
MT-BU5-
H150K
2×MT-BR5-H75K
2×14mm
2
MT-BU5-
H220K
3×MT-BR5-H75K
3×14mm
2
MT-BU5-
H280K
4×MT-BR5-H75K
4×14mm
2
MT-BU5-
H375K
5×MT-BR5-H75K
5×14mm
2
BBA
AA
AB
A
30075 75
4507.5
L
C
LP
LN
CN8
P
N
X-Y
C
P, PR terminal
M6
P PR TH1
TH2
E
M4
193 189
480
510
85
85800
37 60 2110
40
30
NP
4 7
Mounting hole
2 M6 screw N
4 15
Mounting hole
Brake Unit Type
A AA AB B BA C Lc LP LN N
Approx.
mass
X Y Z
200V
class
MT-BU5-55K 118 102 90 200 100 256.5 550 1740 1740 1 1.5 14 12 8
MT-BU5-110K 188 172 160 200 100 256.5 550 2000 2000 2 3.0 22 12 8
400V
class
MT-BU5-H75K 118 102 90 200 100 256.5 550 1740 1740 1 1.5 14 12 8
MT-BU5-H150K 188 172 160 200 100 256.5 550 2000 2000 2 3.0 22 12 8
MT-BU5-H220K 258 242 230 200 100 256.5 550 2000 2000 3 4.5 38 12 8
MT-BU5-H280K 328 312 300 200 100 256.5 550 2330 2330 4 6.0 60 12 10
MT-BU5-H375K 398 382 370 200 100 256.5 550 2330 2330 5 7.5 60 12 10
Resistor Unit
Type
Resistance
Value
Mass
200V
class
MT-BR5-55K 2.0Ω 50kg
400V
class
MT-BR5-
H75K
6.5Ω 70kg
MC
R/L1
Motor
IM
Inverter
Brake unit
MT-BU5
Resistor unit
MT-BR5
S/L2
T/L3
U
V
P/+
N/
P
PR
P
PR
P
PR
P
TH1
TH2
PR
CN8
W
Three-phase
A
C power
supply
MCCB
TH1
TH2
MC
OFFON
MC
CR1 CR2
CR1
CR2
T *1
5m or
less
*2
(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 terminals P/+ and N/- and
connect the control circuit 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 multi-
ple resistor units has terminals
equal to the number of resistor
units. Connect one resistor unit
to one pair of terminals (P, PR).
Inverter
Brake unit
*1 When the power supply is 400V class, install a step-down transformer.
*2 The wiring length between the resistor unit and brake resistor should be 10m maximum when
wires are twisted and 5m maximum when wires are not twisted.
- [Highest level of inverter] 2
- 200V class 5
- 400V class 5
- Standard Specifications 6
- Common specifications 7
- Outline Dimension Drawings 8
- Inverter Type H H1 D D1 9
- (Unit: mm) 10
- FR-A720-75K, 90K 11
- FR-A740-110K, 132K 11
- DC reactor supplied 11
- Unit: mm) 11
- FR-A740-315K, 355K 13
- FR-A740-400K, 450K, 500K 14
- Heatsink protrusion procedure 16
- Panel cutting 17
- Inverter Type D1 18
- Terminal Connection Diagram 19
- Terminal 20
- Terminal Name Description 20
- Main circuit 22
- Control circuit 22
- Torque control 23
- Position control 23
- Operation Panel (FR-DU07) 24
- Operation mode switchover 25
- Monitor/frequency setting 25
- Parameter List 26
- Terminal Connection 27
- Terminal Specification 27
- Explanation 27
- , 2 1 0 67 33
- , 9999 1 9999 67 33
- *2 9999 55 36
- 73 38
- 0, 46, 112 39
- 1, 2, 18 39
- 3, 19, 47, 113 39
- 4 to 6, 24 to 27, 232 to 239 39
- 10 to 12, 802, 850 40
- 24 to 27 42
- Output frequency (Hz) 43
- Output frequency 43
- 31 to 36 44
- 37, 144, 505, 811 44
- 41 to 43, 50, 116, 865 44
- 55, 56, 866 45
- 57, 58, 162 to 165, 299, 611 46
- 61 to 64, 292, 293 47
- 65, 67 to 69 48
- Analog input selection 49
- 73, 242, 243, 252, 253, 267 49
- 74, 822, 826, 832, 836, 849 49
- Frequency 50
- Operation mode selection 51
- 100 equals the 53
- Modbus-RTU protocol 54
- 127 to 134, 575 to 577 55
- 135 to 139, 159 55
- 150 to 153, 166, 167 55
- 160, 172 to 174 56
- 178 to 189 57
- 190 to 196 57
- 245 to 247 58
- 251, 872 58
- 255 to 259 58
- ≠ "9999") 59
- 270 to 274, 4, 5 60
- Stop-on contact control 60
- 270, 275, 276, 6 60
- Brake sequence function 61
- 278 to 285, 292 61
- 285, 853 61
- 286 to 288 62
- 291, 384 to 386 62
- 338, 339, 550, 551 62
- 359, 367 to 369 63
- 419, 464 to 494 64
- 419, 428 to 430 64
- 420, 421, 424 64
- 804 to 806 66
- 807 to 809 66
- 818, 819 66
- 840 to 848 68
- 858, 868 68
- 862, 863 69
- 882 to 886, 665 69
- 888, 889 70
- 892 to 899 70
- C0(900), C1(901) 70
- 989, CL, ALLC, Er.CL, PCPY 71
- Protective Functions 72
- Major failures 73
- Option and Peripheral Devices 74
- Stand-alone Shared 75
- Stand-alone Option 76
- Less than D 76
- Braking torque 78
- Brake unit selection table 79
- Inverter 80
- Brake unit 80
- Recommended cable size 82
- Cable Clamp MS3057-12A 83
- MCCB INV 84
- × (Ig1+Ign+lgi+Ig2+Igm) 85
- ≥ Ig × 10) 85
- Safety Precautions 86
- 0.4K 0.75K 88
- 1.5K or 88
- Leakage currents 89
- Application to Motor 90
- Output torque 91
- Motor type 92
- Dedicated motor model lineup 92
- Motor specification 93
- Dimensions table (Unit: mm) 94
- (1500r/min series) 94
- Section BB 96
- Section B 97
- (1500r/min series) 99
- Item FR-A500(L) FR-A700 101
- Warranty 102
- International FA center 103
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