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3 braking operation with external brake resistor, Braking operation – Lenze 8400 BaseLine Manual User Manual

Page 95

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Braking operation

Braking operation with external brake resistor

8

95

EDS84ABD302 EN 4.0

8.3

Braking operation with external brake resistor

To decelerate greater moments of inertia or with a longer operation in generator mode an

external brake resistor is required. It converts braking energy into heat.
The brake resistor is connected if the DC-bus voltage exceeds the switching threshold. This

prevents the controller from setting pulse inhibit through the ”Overvoltage” fault and the

drive from coasting. The external brake resistor serves to control the braking process at any

time.
The E84AVBD...4 controllers are equipped with a brake chopper. The brake chopper

switches in the external brake resistor.

ƒ

Adapt the switching threshold to the mains voltage (C00173/C00714, see software

manual).