Siemens SINAMICS S120 Manual page 433

Description
The option includes the installation of surge arresters and upstream fuses for each phase.
The signaling contacts of the monitoring of the surge arresters and the fuses are connected
in series and connected to a customer interface.
Removal of the connection clip to the interference suppression capacitor for operation in an IT system
When operating the devices in an IT system, the connection clip to the interference
suppression capacitor must be removed in the following Cabinet Modules:
● Basic Line Connection Modules
● Active Line Connection Modules (connection clip in the Active Interface Module)
For the positions of the connection links in the respective Cabinet Modules, see Chapter
"Connection of the Cabinet Modules to non-grounded systems (IT systems)".
X700 - monitoring surge arresters and fuses
Table 9- 53
Terminal
1
4
Max. connectable cross-section: 2.5 mm²
NC: NC contact
1)
Reason why the monitoring function responds
After the monitoring function responds at terminal block X700:1/4, the cause must be
identified:
● Surge arresters (-A703, -A704-, A705) have a display showing the operating state.
● In the event of a fault, the fuses (-Q700) must be checked and may have replaced once
the fault cause has been eliminated.
Replacing surge arresters
The surge arrestor involved must be replaced in the case of a fault:
● Basic Line Connection Modules, Active Line Connection Modules, 3 AC 380 ... 480 V:
The insert (protection module) is removed by withdrawing the defective insert and
installing the spare part.
● Basic Line Connection Modules, Active Line Connection Modules, 3 AC 500 ... 690 V:
The complete surge arrester is replaced.
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A
Terminal block X700, monitoring surge arresters and fuses
Designation Technical data
1)
NC Max. load current:
- at 24 V DC: 1 A
NC
- At 230 VAC: 0.5 A
Options
9.28 L21, surge suppression
431