Configuring Resistors - Siemens SINAMICS S120 Function Manual

Basic functions
6.12 Motor Module as a Braking Module
6.12.2

Configuring resistors

Rules and values
● Under no circumstances may the resistance values for the peak braking power, which are
● The resistance values apply for each of the 3 resistors in a star connection in the cold
● Each braking resistor absorbs 1/3 of the total braking power. It is imperative that you take
● For a delta connection, multiply the braking resistance value by a factor of 3.
● The tables apply for all Motor Modules of the "chassis" format (liquid- or air cooling).
● The cable lengths to the resistors must be at least 10 m.
● At rated voltages of 380 V to 480 V, Motor Module with a type rating ≥ 250 kW are
● At rated voltages of 500 V to 690 V, all Motor Modules in the "chassis" format have been
You can enter the resistance value in a star connection into parameter p1360. The default
setting of the resistance values is calculated from:
● p1360 = p1362[0] / (√(6) * r0207[0])
● p1362[0] = Braking Module activation threshold according to the following table
● r0207[0...4] = rated current of the Infeed Module.
Table 6- 8 Resistance table 380 - 480 V supply voltage
Motor Rated
Module voltage
frame size
[V]
G 400
480
H 400
480
H 400
480
H 400
480
J 400
480
J 400
480
302
listed in this table, be fallen below!
state.
into account the power rating of the resistors
permitted.
released for use of this function.
Rated Braking
current current
[A] [A]
490 450
490 450
605 545
605 545
745 680
745 680
840 800
840 800
985 900
985 900
1260 1215
1260 1215
U Continuou
DC link
chopper s braking
threshold power
[V] [kW]
667 368
774 427
667 445
774 517
667 555
774 645
667 654
774 758
667 735
774 853
667 93
774 1152
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Peak Resistance at the
braking continuous
power braking power
[kW] [Ω]
551 0,605
640 0,702
668 0,500
775 0,580
833 0,400
967 0,465
980 0,340
1138 0,395
1103 0,303
1280 0,351
1489 0,224
1728 0260
Resistance at the
peak braking
power
[Ω]
0,403
0,466
0,333
0,387
0,267
0,310
0,277
0,263
0,202
0,234
0,149
0,173
Drive functions