Lenze 520 Series - Selection of the External Brake Resistors; Stationary Generator Mode; Reversing and Braking Mode

4Q - DC Chopper 520 series
5.4 SELECTION OF THE EXTERNAL BRAKE RESISTORS
When selecting the suitable brake resistor, observe:
- the actual continuous brake power and
- the kinetic energy to be braked.
Brake resistors are not supplied with the chopper.
Caution! Since the surface of the brake r~sistors may heat up to 350
0C, the
resistors must be built into a fire-proof housing.
5.4.1 STATIONARY GENERATOR MODE
The rated power of the brake resistor(s) results from:
~N = VGen max~ ‚Genmax
The continuous brake power and the continuous brake current must not be
exceeded.
Example: A drive operates with the following motor data in the generator mode:
LJGen max = 130V
‚Gen max — 3A
= l30V~3A
5.4.2 REVERSING AND BRAKING MODE
tBR
tzy
Chapper type
1:3-1:9 1:10 and larger
522 E Brake resistar, part na. 309 164
1 x 100R, 250W
1 lOkWs
Overcurrent release, part na. 325 695
Setting: 1.58A
Brake resistor, part na. 309 163
1 x iQOR, 100W, 4kWs
Overcurrent release, part na. 325 693
Setting: 1.OA
524 E Brake resistor, part na. 325 193
1 x 47R, 600W, 3OkWs
Overcurrent release, part na. 325 696
Setting: 3.6A
Brake resistar, part na. 309 163
2xlOOR in parallel, 2xlOOW, 2 x 4kWs
Ouercurrent release, part na. 325 695
Setting: 2.OA
Lenze
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