Electronics Losses Of Power Units; Losses In Partial-Load Operation - Siemens SINAMICS S120 Combi Manual

Cabinet design and EMC
12.8 Note on control cabinet cooling
12.8.4.5

Electronics losses of power units

Table 12- 20 Electronics losses for Motor Modules Booksize Compact and S120 Combi Power Mod-
Component
Single Motor Module
Double Motor Module
S120 Combi
3 axes Power Module
S120 Combi
4 axes Power Module
Without power loss of the external fan
1)
12.8.4.6

Losses in partial-load operation

Losses in the partial-load range for the S120 Combi
The losses of the S120 Combi in partial-load operation can be calculated using the following
formula:
P = a + b + IN1 * P1 + S1 * I1 + S2 * I2 + S3 * I3 + S4 * I4
V
a: Electronics losses of the S120 Combi
b: Electronics losses of the external fan unit (article number: 6SL3161-0EP00-0AA0)
IN1, S1 - S4: Coefficients to calculate the power loss
P1: Infeed power [kW] (LINE X1)
I1: Spindle current [A] (SPINDLE X2)
I2: Current of the 1st feed axis (servo X3)
I3: Current of the 2nd feed axis (servo X4)
I4: Current of the 3rd feed axis (servo X5)
302
ules
3 A
5 A
9 A
18 A
1.7 A
3 A
5 A
16 kW / 18 A / 5 A / 5 A
1)
16 kW / 24 A / 9 A / 9 A
20 kW / 30 A / 9 A / 9 A
10 kW / 24 A / 12 A / 12 A / 12 A
1)
16 kW / 18 A / 9 A / 5 A / 5 A
16 kW / 24 A / 9 A / 9 A / 9 A
20 kW / 30 A / 12 A / 9 A / 9 A
Power loss [W]
20.4
20.4
20.4
20.4
27.6
27.6
27.6
36.0
36.0
36.0
38.4
38.4
38.4
38.4
SINAMICS S120 Combi
Manual, 11/2017, 6SL3097-4AV00-0BP7