Depending on the input current, the following versions are available:

• ? 800 A: Main circuit breaker with fuse switch disconnector
• > 800 A: Circuit breaker, type 3WL, with option L25 as withdrawable circuit breaker

A fully controlled thyristor bridge is used to pre-charge the Basic Line Connection Module and the connected DC link. The thyristors normally operate with a trigger delay angle of 0°.

The power rating can be increased by connecting Basic Line Connection Modules in parallel. You must observe the following rules:

• Up to four identical Active Line Connection Modules can be connected in parallel.
• 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). For information on using line reactors, see section Basic Line Connection Modules > Overview.
• A derating factor of 7.5% 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. Monitoring is performed via the -X50 terminals of the respective Line Connection Module.
• Option M88 must be ordered.

For additional information, please refer to the SINAMICS Low Voltage Engineering Manual.