380V 3-phase ac dynamic braking units for AC Drive/Frequency Inverter

Power

Grid voltage

Three-phase 220V/380V/460/660V (it depends on the models)

Grid frequency

45Hz~65Hz

Control

Braking mode

Automatic voltage tracking

Response time

Within 1mS, multiple noise filtering algorithm

Response voltage

It depends on the models.

Hysteresis voltage

Less than 10V

Protective function

Overheating, over-current and short circuit

Overheating protection

75°C

Digital input port

one, and function setting by software

Digital output port

One, and function setting by software

Indications and setting

Status indication

All types are with power and working indications.

Types with operation panels are with power, fault, blown fuse and braking status indications.

Operation monitoring

Types with operation panels are available with operating parameters for monitoring DC bus voltage and inside temperature.

Response voltage setting

For EM-BU1/BU2/BU3 series, it can be set by the jumper wire in short circuit.

For EM-BU3HA/4HA/5HA series, it can be set directly by operation panels.

For others, it can be set when leaving factory.

Conditions

Installation site

Indoor, less than 1000m altitude, no direct sunlight, without conductive dust or corrosive gas.

Ambient temperature

-10~40°C and sound ventilation

Ambient humidity

Below 90%RH (no dewing)

Vibration

Below 0.5g

Brake Unit

Specific occasion

Min. resistance

Rated current

Peak current

Match inverter

Model

EM-BU1

Dynamic braking

20 ohm

6A

33A

0.75~18KW

EM-BU2

15 ohm

10A

50A

22~45KW

EM-BU3

7 ohm

15A

100A

55~110KW

EM-BU3H

5 ohm

40A

150A

132~160KW

EM-BU4H

3.5 ohm

50A

200A

187~220KW

EM-BU5H

2.5 ohm

60A

300A

250~315KW

EM-BU3HA

With keypad dynamic braking

5 ohm

40A

150A

132~160KW

EM-BU4HA

3.5 ohm

50A

200A

187~220KW

EM-BU5HA

2.5 ohm

60A

300A

250~315KW