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Name (type) specifications, structure, etc, Brake unit mt-bu5-(h) k resistor unit mt-br5-(h) k, Brake unit selection table – MITSUBISHI ELECTRIC INVERTER FR-F700 User Manual

Page 53

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Features

Standard

Specifications

Outline

Dimension

Drawings

Operation

Panel

Protective

Functions

Options

Instructions

Motor

Compatibility

W

arranty

Inquiry

Peripheral Devices

Why energy

savings?

Te

rminal Connection

Diagram

Te

rminal Specification

Explanation

Parameter

List

Explanations

of

Parameters

54

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

B

ra

ke u

n

it

2

0

0

V

MT-BU5-55K

%ED

5

------

------

------

------

------

------

------

------

MT-BU5-110K

20

15

10

------

------

------

------

------

------

4

0

0

V

MT-BU5-H75K

%ED

10

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

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

Br

a

k

e u

n

it

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

B

BA

AA

AB

A

300

75

75

450

7.5

L

C

L

P

L

N

CN8

P

N

X-Y

C

P, PR terminal

M6

P PR TH1

TH2

E

M4

193

189

480
510

85

85

800

37

60

21

10

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

2.0

50kg

400V

class

MT-BR5-
H75K

6.5

70kg

(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-
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).

R/L1

T/L3

S/L2

U

W

V

N/-

P/+

IM

CN8

TH1

TH2

PR

P

PR

P

P

PR

P

PR

Inverter

Cable provided with a brake unit

Brake unit

MT-BU5

Resistor unit

MT-BR5

The wiring length should be 10m
maximum when wires are twisted
and 5m maximum when wires are
not twisted.

Inverter

Brake unit