Siemens SINAMICS S150 NEMA, Руководство по эксплуатации

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Electrical installation
4.9 Additional connections
Enclosed Drives
142
Operating Instructions, 12/2018, A5E36652151A
4.9.12 Line-side surge arrester (option L96)
Description
The Siemens TPS3-03 surge arrester protects the cabinet components from overvoltages.
The device is connected after the mains switch.
A green LED on the device (equipment designation -A96) indicates the correct functioning.
If this LED is dark when voltage is applied, the device must be replaced.
4.9.13 Insulation monitor (option L87)
Description
On ungrounded / IT power networks, the insulation monitor checks the entire electrically-
connected circuit for insulation faults. The insulation resistance as well as all insulation faults
from the line supply to the motor in the cabinet unit are detected. Two response values
(between 1 k Ω and 10 M Ω ) can be set. If a response value is undershot, an alarm is output
to the terminal. A system fault is output via the signaling relay system.
In the delivery condition of the cabinet unit, the plant configuration (one or more loads on an
electrically-connected network) and protection concept (immediate shutdown in the event of
an insulation fault or restricted continued operation) are not known. The signaling relays of
the insulation monitor must be integrated into the fault and alarm circuit by the customer.
Safety instructions
Note
Number of insulation monitors
Only one insulation monitor can be used within one electrically-connected network.
Note
The connection clip to the basic interference suppression module is removed in the factory
When using the insulation monitoring option, the connecting clip to the basic interference
suppression module is removed in the factory and placed in the cabinet unit (see Chapter
"Electrical installation/removing the connecting clip to the basic interference suppression
module when connected to ungrounded line supplies (IT line system)").