Overcurrent Protection - Siemens SINAMICS S220 Equipment Manual

Application planning
4.10 24 V DC supply voltage
Recommended power supplies: SITOP Power modular
Rated output cur‐ Phases
rent [A]
40 1 / 2
3
Recommended power supply: SITOP PSU400M
Rated output cur‐ Phases
rent [A]
20 -
Recommended power supply: Control Supply Module
Rated output cur‐ Phases
rent [A]
20 3
4.10.4

Overcurrent protection

Overview
The cables on the primary and secondary sides of the 24 V power supply must be protected
against impermissible overcurrents.
Description
Primary side protection must be implemented according to the manufacturer's instructions.
Secondary side protection depends on the prevailing situation:
• Load levels as a result of connected loads, including the simultaneity factor depending on the
operation of the machine
• Establishing the 24 V connection between the components in the drive line-up via the 24 V
busbars integrated in the components; continuous current-carrying capacity of these 24 V
busbars: 20 A
• Continuous current-carrying capacity of the conductors and cables used in normal and short-
circuit conditions
• Ambient temperature
50
Rated input voltage [V]
Operating voltage range [V]
AC 120/230
85 ... 132/176 ... 264
3 AC 230/400 ... 288/500
320 ... 550
Rated input voltage [V]
Operating voltage range [V]
300 ... 824 DC
Rated input voltage [V]
Operating voltage range [V]
3 AC 380 ... 480
300 ... 800 DC
Short-circuit current [A]
approx. 46 (running up)
typ. 120 for 25 ms (in oper‐
ation)
Short-circuit current [A]
approx. 40 (running up)
typ. 60 for 25 ms (in opera‐
tion)
Short-circuit current [A]
< 24
Equipment Manual, 09/2023, A5E53307519B AA
Article number
6EP1337-3BA00-8AA0
6EP1437-3BA00-8AA0
Article number
6EP1536-3AA00
Article number
6SL3100-1DE22-0AA1
Booksize power units