D.8.1 Select the braking components

It is appropriate to use braking resistor or braking unit when the motor brakes sharply or the motor is driven by a high inertia load. The motor will become a generator if its actual rotating speed is higher than the corresponding speed of the reference frequency. As a result, the inertial energy of the motor and load return to the VFD to charge the capacitors in the main DC circuit. When the voltage increases to the limit, damage may occur to the VFD. It is necessary to apply braking unit/resistor to avoid this accident happens.

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  • Only qualified electricians are allowed to design, install, modulate and operate on the VFD.

  • Follow the instructions in “warning” during working. Physical injury or death or serious property may occur.

  • Only qualified electricians are allowed to wire. Damage to the VFD or braking options and part may occur. Read carefully the instructions of braking resistors or units before connecting them with the VFD.

  • Do not connect the braking resistor with other terminals except for PB and (-). Do not connect the braking unit with other terminals except for (+) and (-).Damage to the VFD or braking circuit or fire may occur.

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Connect the braking resistor or braking unit with the VFD according to the diagram. Incorrect wiring may cause damage to the VFD or other devices.

Goodrive310-UL series VFDs below 220V (15kW), 460V (G-type≤30kW, P-type≤37kW) need internal braking units and the VFDs 220V (18.5kW), 460V (G-type≥37kW, P-type≥45kW) need external braking unit. Please select the resistance and power of the braking resistors according to actual utilization.

The VFDs of 220V (15kW), 460V (G-type≤30kW; P-type≤37kW) have embedded braking units but the VFDs of 220V (18.5kW), 460V (G-type≥37kW; P-type≥45kW) have optional braking units. Please select the braking resistor according to actual operation.

Model

Model of

braking

unit

Brake

Resistor

at 100% of brake torque  (Ω)

The consumed power of braking resistor

Min allowable braking resistance (Ω)

10% braking

50% braking

80% braking

GD310-0R7G-2-UL

Embedded

braking unit

192

0.11

0.56

0.9

93

GD310-1R5G-2-UL

96

0.23

1.1

1.8

44

GD310-2R2G-2-UL

65

0.33

1.7

2.64

44

GD310-004G-2-UL

36

0.6

3

4.8

33

GD310-5R5G-2-UL

26

0.75

4.13

6.6

25

GD310-7R5G-2-UL

19

1.13

5.63

9

13

GD310-011G-2-UL

13

1.6

8

12.8

8.8

GD310-015G-2-UL

9.6

2

11

18

6.4

GD310-018G-2-UL

DBU100H-060-2

8

3

14

22

GD310-022G-2-UL

DBU100H-110-2

6.5

3

17

26

GD310-030G-2-UL

4.8

5

23

36

3.5

GD310-037G-2-UL

3.9

6

28

44

GD310-045G-2-UL

DBU100H-160-2

3.2

7

34

54

2.4

GD310-055G-2-UL

2.6

8

41

66

GD310-1R5G-4-UL

Embedded

braking unit

326

0.23

1.1

1.8

170

GD310-2R2G-4-UL

222

0.33

1.7

2.6

130

GD310-004G-4-UL

122

0.6

3

4.8

80

GD310-5R5G-4-UL

89

0.75

4.1

6.6

60

GD310-7R5G-4-UL

65

1.1

5.6

9

47

GD310-011G-4-UL

44

1.7

8.3

13.2

31

GD310-015G-4-UL

32

2

11

18

23

GD310-018G-4-UL

27

3

14

22

19

GD310-022G-4-UL

22

3

17

26

17

GD310-030G-4-UL

16

5

23

36

17

GD310-037G-4-UL

DBU100H-060-4

13

6

28

44

11.7

GD310-045G-4-UL

DBU100H-110-4

10

7

34

54

6.4

GD310-055G-4-UL

8

8

41

66

GD310-075G-4-UL

6.5

11

56

90

GD310-090G-4-UL

DBU100H-160-4

5.4

14

68

108

4.4

GD310-110G-4-UL

4.5

14

83

132

GD310-132G-4-UL

DBU100H-220-4

3.7

20

99

158

3.2

GD310-160G-4-UL

DBU100H-320-4

3.1

24

120

192

2.2

GD310-185G-4-UL

2.8

28

139

222

GD310-200G-4-UL

2.5

30

150

240

GD310-220G-4-UL

DBU100H-400-4

2.2

33

165

264

1.8

GD310-250G-4-UL

2.0

38

188

300

GD310-280G-4-UL

TWO

DBU100H-320-4

3.6*2

21*2

105*2

168*2

2.2*2

GD310-315G-4-UL

3.2*2

24*2

118*2

189*2

GD310-350G-4-UL

2.8*2

27*2

132*2

210*2

GD310-400G-4-UL

2.4*2

30*2

150*2

240*2

GD310-500G-4-UL

TWO

DBU100H-400-4

2*2

38*2

186*2

300*2

1.8*2

GD310-5R5P-4-UL


122

0.6

3

4.8

80

GD310-7R5P-4-UL

89

0.75

4.1

6.6

60

GD310-011P-4-UL

65

1.1

5.6

9

47

GD310-015P-4-UL

44

1.7

8.3

13.2

31

GD310-018P-4-UL

32

2

11

18

23

GD310-022P-4-UL

27

3

14

22

19

GD310-030P-4-UL

22

3

17

26

17

GD310-037P-4-UL

16

5

23

36

17

GD310-045P-4-UL

DBU100H-060-4

13

6

28

44

11.7

GD310-055P-4-UL

DBU100H-110-4

10

7

34

54

6.4

GD310-075P-4-UL

8

8

41

66

GD310-090P-4-UL

6.5

11

56

90

GD310-110P-4-UL

DBU100H-160-4

5.4

14

68

108

4.4

GD310-132P-4-UL

4.5

14

83

132

GD310-160P-4-UL

DBU100H-220-4

3.7

20

99

158

3.2

GD310-185P-4-UL

DBU100H-320-4

3.1

24

120

192

2.2

GD310-200P-4-UL

2.8

28

139

222

GD310-220P-4-UL

2.5

30

150

240

GD310-250P-4-UL

DBU100H-400-4

2.2

33

165

264

1.8

GD310-280P-4-UL

2.0

38

188

300

GD310-315P-4-UL

TWO

DBU100H-320-4

3.6*2

21*2

105*2

168*2

2.2*2

GD310-350P-4-UL

3.2*2

24*2

118*2

189*2

GD310-400P-4-UL

2.8*2

27*2

132*2

210*2

GD310-500P-4-UL

TWO

DBU100H-400-4

2.4*2

30*2

150*2

240*2

2.2*2

GD310-018G-6-UL

DBU100H-110-6

55

4

17

27

10.0

GD310-022G-6-UL

40.3

5

23

36

GD310-030G-6-UL

32.7

6

28

44

GD310-037G-6-UL

26.9

7

34

54

GD310-045G-6-UL

22.0

8

41

66

GD310-055G-6-UL

16.1

11

56

90

GD310-075G-6-UL

13.4

14

68

108

GD310-090G-6-UL

11.0

17

83

132

GD310-110G-6-UL

DBU100H-160-6

9.2

20

99

158

6.9

Note:

Select the resistor and power of the braking unit according to the data provided by our company.

The braking resistor may increase the braking torque of the VFD. The resistor power in the above table is designed on 100% braking torque and 10% braking usage ratio. If the users need more braking torque, the braking resistor can decrease properly and the power needs to be magnified.

When using the external braking units, please see the instructions of the energy braking units to set the voltage degree of the braking unit. Incorrect voltage degree may affect the normal running of the VFD.

image.png

Never use a brake resistor with a resistance below the minimum value specified for the particular drive. The drive and the internal chopper are not able to handle the overcurrent caused by the low resistance.

image.png

Increase the power of the braking resistor properly in the frequent braking situation (the frequency usage ratio is more than 10%).


D.8.2 Selecting the brake resistor cables

Use a shielded cable to the resistor cable.

D.8.3 Placing the brake resistor

Install all resistors in a place with enough ventilation.

image.png

The materials near the brake resistor must be non-flammable. The surface temperature of the resistor is high. Air flowing from the resistor is of hundreds of degrees Celsius. Protect the resistor against contact.

Installation of the braking resistor:

image.png

  • The VFDs of 220V (≤15kW) and 460V (G-type≤30kW, P-type≤37kW) only need external braking resistors.

  • PB and (+) are the wiring terminals of the braking resistors.

image.png

Installation of braking units:

image.png

  • The VFDs of 220V (≥18.5kW) need external braking units.

  • The VFDs of 460V460V (G-type≥37kW, P-type≥45kW) need external braking units.

  • The VFDs of 575V need external braking units.

  • (+), (-) are the wiring terminals of the braking units.

  • The wiring length between the (+), (-) terminals of the VFD and the (+), (-) terminals of the braking units should be no more than 5m, and the distributing length among BR1 and BR2 and the braking resistor terminals should be no more than 10m.

Signal installation is as below:

image.png


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