Dimensioning Conditions - Lenze L-force Drives ERBM R W Série Instructions De Montage

Dimensioning conditions

If brake resistors are used, observe the following:
ƒ Mean value of regenerative power < permanent power P
the brake resistor.
ƒ Regenerative power during braking time < heat quantity Q
of the brake resistor.
ƒ Braking time < 10 % of cycle time (braking time + dead
time).
ƒ Always connect the thermal contact and integrate it in a
way into the system monitoring that the mains supply will
be switched off when the standard device is overheated.
At all times, the following must apply: In the time interval t
(brake resistor cycle) the cumulative braking times t
£
always be of the maximum total braking time t
Calculation
Brake resistor cycle t
Q
+
t
cyc,RB
P
Q Heat quantity in Ws
B
P Permanent power in W
d
Max. total braking time t
Q
+
t
brk,max
Q Heat quantity in Ws
B
R
Resistance in
B
U Max. operating voltage in V
max
EDKRBM390R DE/EN/FR/ES/IT 3.1
:
cyc,RB
B
with
d
brk,max
@ R
B B
with
2
U
max
W
l
Product description
Dimensioning conditions
within the time interval t
3
of
d
B
cyc,RB
must
brk
.
brk,max
:
cyc,RB
33