Operation In The It System (Option L21) - Siemens SINAMICS G150 Operating Instructions Manual
Converter cabinet units 75 kw to 1500 kw
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- Manual (1843 pages) ,
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- Operating manual (240 pages)
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4.11.7
Operation in the IT system (option L21)
Description
The option includes the installation of surge arresters and upstream fuses for every phase.
The signaling contacts of the surge arrester and fuse monitoring are connected in series and
connected to a customer interface.
For this option, the connection clips to the interference-suppression capacitor are removed
from the respective cabinet units and included in the accessory kit.
Installation of the connection clip to the interference suppression capacitor for operation in a TN
system
When the devices are operated in a TN system, the connection clip to the interference
suppression capacitor must be reinstalled in the relevant cabinet units.
The connection clips are included in the accessories pack for the cabinets.
For the positions of the connection clip in the respective cabinet units, see "Removing the
connection clip to the interference suppression capacitor for operation on an ungrounded line
supply (IT system)".
X700 - monitoring surge arresters and fuses
Table 4- 40
Terminal
1
4
Max. connectable cross-section: 2.5 mm²
1)
Reason why the monitoring responded
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.
● The upstream fuses (-Q700) are monitored using phase failure monitoring (-B700), which
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
Terminal block X700, monitoring surge arresters and fuses
Designation
NC
NC
NC: normally-closed contact
has an LED status display. In the event of a fault as a result of a defective fuse, the fuses
(-Q700) must be checked, and if required, replaced after removing the fault.
Technical data
1)
Max. load current:
- At 24 V DC: 1 A
- At 230 V AC: 0.5 A
Electrical installation
4.11 Other connections
131
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