Lenze EMB9351-E Instructions De Mise En Service page 83

Step 1: Calculate brake resistance
U
+
R
B
P
gen,max
Step 2: Determine the number of brake resistors
Two brake resistors are selected with 18 W each which are connected in parallel.
Please observe the rated power when dimensioning the brake resistors. It
ƒ
results from the average braking power of a machine cycle.
Step 3: Calculate the number of brake choppers per brake resistor
+
N
Brm
Every one of the two brake resistors requires two brake choppers each.
EDBMB935X DE/EN/FR 12.0
2
2
(725 V)
DC + + 9.55 W
55 kW
P (3s)
+ 34.375 kW
gen,ave
2 @ 10 kW
@ P
N (U )
R N
ch
l
Dimensioning
Dimensioning examples
Translatory movement
+ 1.72 å 2
5
83