L41, Current Transformer Upstream Of Main Switch - Siemens SINAMICS S120 Device Manual

Note
Switching under load when checkback signal wiring is missing
If parameter p0864 is not wired to the checkback signal, it is possible to operate the switch
under load. This can shorten the service life of the switch.
Note
To switch from the "Pre-charging" to the "1 (Operation)" position, a switching current of 4
A/24 V DC is required for 30 ms. This must be provided via the auxiliary power supply and
taken into account during dimensioning (see the block diagram above).
Note
Additional information
When activating digital inputs, note the guidelines provided in the List Manual and S120
Commissioning Manual.
8.29

L41, current transformer upstream of main switch

Availability of option
This option is available for the following S120 Cabinet Modules:
● Line Connection Modules
Description
If current transformers are used for measuring or monitoring purposes, they are installed in
the Line Connection Modules with option L41. The current transformers are included in all
three supply phases of the infeed.
The transformers have an accuracy class of 1.0. The secondary current is 5 A maximum.
The measuring connections for the current transformers are routed in the Line Connection
Module to terminal block -X60.
Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A
8.29 L41, current transformer upstream of main switch
Options
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