Rating For Lenze Brake Resistors - Lenze 8400 Hardware Manual

8 Braking operation
Braking operation with external brake resistor

Rating for Lenze brake resistors

8.2.5 Rating for Lenze brake resistors
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 resistors (IP20) recommended in the table are designed to tolerate a
regenerative power of approx. 1.5 times the normal value. The cycle time of the brake
resistors is 150s and includes a braking time of max. 15s and a recovery time (pause) of min.
135s.
The brake resistors are equipped with a thermostat (potential-free NC contact,
ƒ
switching capacity: AC 250V, 0.5A).
To increase the power, brake resistors can be connected in parallel or in series.
ƒ
– The resistance for the controller must not fall below the lowest permissible value.
– The thermostat of several brake resistors at a controller must always be connected
in series.
256

EDS84ASC552 EN 10.0