Fuse Switch Disconnector (Input Current ≤ 800 A); Circuit Breaker (Input Current > 800 A) - Siemens SINAMICS S120 Manual

Cabinet Modules
6.2 Active Line Connection Modules
Parallel connection of Active Line Connection Modules to increase the power rating
The following rules must be observed when connecting Active Line Connection Modules in
parallel:
● Up to 4 identical Active Line Connection Modules can be connected in parallel.
● Option M88 (DC busbar system for the line-side Cabinet Modules) must be installed so
that the infeed can be realized at the common DC link.
● A common Control Unit is required whenever the modules are connected in parallel.
● The parallel connection must be supplied from a common infeed point (i.e. the modules
cannot be operated on different line supplies); also see SINAMICS Low Voltage
Engineering Manual.
● A derating factor of 5% must be taken into consideration, regardless of the number of
modules connected in parallel.
● The main contactors or circuit breakers of the respective Line Connection Modules must
close together and simultaneously.
The monitoring is realized via terminals -X50 of the particular Line Connection Module.
6.2.1.1 Fuse switch disconnector (input current ≤ 800 A)
Up to 800 A, a switch disconnector with integrated fuses is incorporated.
X50 "Fuse switch disconnector" checkback contact
Table 6- 12
Terminal
1
2
3
Max. connectable cross-section: 2.5 mm²
NC: normally-closed contact, NO: normally-open contact, COM: Center contact
1)
6.2.1.2 Circuit breaker (input current > 800 A)
At currents greater than 800 A, the circuit breaker, which is located in the center of the
cabinet, takes on the function of isolating the system from the supply and the overload and
short-circuit protection. The circuit breaker is internally activated and has its own internal
power supply.
The tripping current on the line-side must be set according to the conditions of the system.
154
Terminal block X50 "Fuse switch disconnector" checkback contact
Designation Technical data
1)
NO "Fuse switch disconnector" checkback contacts
Max. load current: 3 A
NC
Max. switching voltage: 250 VAC
COM
Cabinet Modules liquid cooled
Manual, 10/2015, A5E37067587A