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Braking Unit
Braking Unit

Product Introduction

The function of the braking unit is to divert into a braking resistor the regenerative energy produced in the process of decelerating the motor, converting that energy into heat. Regenerative energy flows from the motor into the inverter DC Bus, manifested as increased bus voltage. The advantage gained using the braking unit is improved braking performance and shorter deceleration time of the load.

The braking unit in the DBU series is applied to consume in the braking resistor the regenerative energy produced in the deceleration process of the motor in the form of heat energy .In this way ,the braking performance of the frequency inverter is improved and the braking time of the frequency inverter  is reduced.

 

Features

  1. Safety: The tripping function of the equipment against IGBT short circuit and breakdown can effectively avoid the hidden danger of fire caused by the breakdown of IGBT and the overload operation of the resistor in a long time.
  2. Wide Compatibility :The special design of this braking unit allows for the usage of common resistance rather than the non-inductive resistance .It can be adjusted to adapt to 600V-760V DC chopper wave voltage . Further more, this device is used in various type of medium and low voltage frequency inverter (Specially designed product reaches up to 1200V)
  3. Economy: This facility is characterized by high performance cost ratio . With relatively economical price .its quality is same as that of similar imported products. It is therefore considered as the most economical and practical component product for the braking unit of the inverter .
  4. Adaptable to connection in parallel: It adopts a book-shape design can be installed in a parallel connection with zero clearance .It is recommended that up to 3 units can be connected in parallel .

Outline& Mounting Dimension(Unit:mm)

 

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

 

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

DC380V±5V

6

M4

2.3

4-6

DBU-2030

30A

90A

DC380V±5V

6

M4

2.3

6-8

DBU-4030

15A

50A

DC630/DC660/DC690V/DC730V±10V

6

M4

2.3

4-6

DBU-4045

25A

75A

DC630/DC660/DC690V/DC730V±10V

6

M4

2.3

4-6

DBU-4110

B

60A

200A

DC630/DC660/DC690V/DC730V±10V

8

M8

13.2

16-36

DBU-4220

85A

300A

DC630/DC660/DC690V/DC730V±10V

8

M8

13.2

16-36

DBU-4300

120A

500A

DC630/DC660/DC690V/DC730V±10V

8

M8

13.2

25-50

DBU-6220

85A

300A

DC630/DC660/DC690V/DC730V±10V

8

M8

13.2

16-36

 

 

Recommended brake assembly matching specification

 

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

Built-in

 

200W100Ω

200W100Ω

1

2.2KW

Built-in

 

300W70Ω

300W70Ω

1

3.7KW

Built-in

 

400W40Ω

400W40Ω

1

380V

0.75KW

Built-in

 

80W750Ω

80W750Ω

1

1.5KW

Built-in

 

200W400Ω

200W400Ω

1

2.2KW

Built-in

 

300W250Ω

300W250Ω

1

3.7KW

Built-in

 

400W150Ω

400W150Ω

1

5.5KW

Built-in

 

600W100Ω

600W100Ω

1

7.5KW

Built-in

 

800W75Ω

800W75Ω

1

11KW

Built-in

 

1000W50Ω

1000W50Ω

1

15KW

Built-in

 

1500W40Ω

1500W40Ω

1

18.5KW

Built-in

1

2500W35Ω

2500W35Ω

1

22KW

Built-in

1

3000W27.2Ω

1500W54Ω

1

30KW

4030

1

5000W19.2Ω

2500W40Ω

2

37KW

4045

1

6000W16Ω

2000W50Ω

3

45KW

4045

2

9600W13.6Ω

2500W54Ω

4

55KW

4030

2

12000W10Ω

2000W60Ω

6

75KW

4045

2

16000W7.5Ω

2500W60Ω

8

 

 

 

 

Braking Resistor Box

Quantity(PCS)

 

90KW

4030

3

9600W20Ω

3

100KW

4220

1

9600W20Ω

3

132-160KW

4220

1

40KW3.4Ω

1

185-220KW

4220

1

60KW3.2Ω

1

250-315KW

4220

2

40KW4.5Ω

2

315-600KW

4220

3

60KW3Ω

3

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

Wiring diagram for inverter system

 

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