DBU Braking Unit

Description

Overview

The DBU braking unit diverts regenerative energy from an inverter DC bus into an external braking resistor, where the energy is converted to heat during motor deceleration.

Selection and operation

  • Choose the unit by DC chopper voltage, rated and maximum braking current, motor power and matched resistor requirement.
  • Models cover 380V and 630/660/690/730V chopper settings, with a special design stated up to 1200V.
  • IGBT short-circuit and breakdown tripping protects the braking circuit.
  • Up to three units may be connected in parallel where the application requires additional capacity.

Selection and technical data

Model and dimensional data

Type

Mounting Hole Size (mm)

Terminal Screw Size

Wire Size (mm2)

2015/2030/4015/4030/4045

6

M4

4-6

4220

8

M8

16-36

Matched braking selection

Model

Dimensional Drawing

Rated braking current

Max.Braking Current

Chopper Voltage

Mounting Hole Size

Terminal

Weight(kg)

Cable(mm)

DBU-2015

A

15A

50A

DC380V±5V

6

M4

2.3

4-6

DBU-2022

25A

75A

DBU-2030

30A

90A

6-8

DBU-4030

15A

50A

DC630/DC660/DC690V/DC730V±10V

4-6

DBU-4045

25A

75A

DBU-4110

B

60A

200A

8

M8

13.2

16-36

DBU-4220

85A

300A

DBU-4300

120A

500A

25-50

DBU-6220

85A

300A

16-36

Matched braking selection

Inverter

Braking Unit

Braking resistor

Voltage(V)

Motor(KW)

Model

Qty(PCS)

Recommend resistor value

Resistor specification

Qty(PCS)

220V

0.75KW

Built-in

80W200Ω

80W200Ω

1

1.5KW

200W100Ω

200W100Ω

2.2KW

300W70Ω

300W70Ω

3.7KW

400W40Ω

400W40Ω

380V

0.75KW

Built-in

80W750Ω

80W750Ω

1

1.5KW

200W400Ω

200W400Ω

2.2KW

300W250Ω

300W250Ω

3.7KW

400W150Ω

400W150Ω

5.5KW

600W100Ω

600W100Ω

7.5KW

800W75Ω

800W75Ω

11KW

1000W50Ω

1000W50Ω

15KW

1500W40Ω

1500W40Ω

18.5KW

1

2500W35Ω

2500W35Ω

22KW

3000W27.2Ω

1500W54Ω

30KW

4030

5000W19.2Ω

2500W40Ω

2

37KW

4045

6000W16Ω

2000W50Ω

3

45KW

2

9600W13.6Ω

2500W54Ω

4

55KW

4030

12000W10Ω

2000W60Ω

6

75KW

4045

16000W7.5Ω

2500W60Ω

8

Braking Resistor Box

Quantity(PCS)

90KW

4030

3

9600W20Ω

3

100KW

4220

1

132-160KW

40KW3.4Ω

1

185-220KW

60KW3.2Ω

250-315KW

2

40KW4.5Ω

2

315-600KW

3

60KW3Ω

3

Matched braking selection

Model

AC200V-AC300V

AC380V~AC460V

2015

2022

2030

4030

4045

4220

4300

Input And Output

Peak current (A)

50

75

90

50

75

300

400

Rated Current(A)

15

25

30

15

25

85

120

Breaking initial voltage

380±5V

630/660/690/730/760V±10V

Maximum Hysteresis Error

About 8V

About 16V

Multiple units

Maximum: breaking unit are parallel connected

Power

DC Bus Voltage Range

DC 243~400V

DC460~800V

Indication

Function

Power ON

The red "power" LED will be on when the inverter DC Bus voltage is above ~35VDC

Braking ON

The green "braking" LED will be on during braking unit work

Ambient

Temperature

-10C~+40C ( -10C~+50C for store)

Humidity

90% RH (no dew)

Vibration

1G(10~20HZ), 0.2G ( 20~50HZ)

Protection

IP20

Structure

Wall mounted

Drawings and connection details

DBU braking unit outline and mounting dimensions.
DBU braking unit outline and mounting dimensions.
Inverter braking-system wiring with braking unit and resistor connections.
Inverter braking-system wiring with braking unit and resistor connections.