Brake Resistor Connection - Bosch Rexroth EFC 3600 Easy Start Manual

Easy Start Guide

Bosch Rexroth EFC 3600 Series Inverter

High inertia loads can cause overvoltage trips

during deceleration and lead to "OE-3" error

messages. In many cases, the solution is to

increase the deceleration time to compensate.

However, if the application requires it, dynamic

braking can be enabled to maintain or reduce

deceleration times by absorbing the energy

generated by such loads.

12.1 Parameters to change for Dynamic Braking

Parameter Description

b0.02

Access to additional parameters

E4.01

Overvoltage prevention setting

(+)

Heat Resistant

Cable

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Before commencing, confirm that the Inverter and

all cables are completely isolated from the power

supply, have been isolated for at least 5 minutes

and that the motor is not turning.

How to set

Default is 0 for Basic Parameters. Set at

Set to

2

for Stall protection disabled, braking enabled.

B

(+)

A Brake Resistor is first installed to absorb

braking energy and dissipate it as heat. The

resistor

must

be correctly sized for both the

Inverter and application.

Then, the "brake chopper" within the Inverter is

enabled. This detects excessive braking

energy and redirects it to the resistor when

required.

2

to enable Extended Parameters.

12.2 Connecting the Resistor

A wiring diagram is shown in the illustration

opposite. Connect the brake resistor to the B

and (+) Terminals on the Inverter. The order of

the connections is unimportant.

The braking resistor may get hot during

operation. Ensure that it is mounted in a

suitable position at least 10cm away from other

items.

It is important that a resistor of the correct

rating is used. Consult the manufacturer's

manual or product listing on InverterDrive.com

for further information.

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