Basic Line Modules (BLM) are compact line infeeds for two-quadrant operation, i.e. no regenerative feedback.

They are used when energy need not be fed back into the network.

If regenerative conditions occur in the drive line-up, Braking Modules must be used because they convert the excess energy into heat in braking resistors.

Basic Line Modules are suitable for connection to grounded TN/TT and non-grounded IT systems. The following voltages and power ratings are available:

The power ratings can be increased by connecting up to four identical Basic Line Modules in parallel.

For an infeed with the Basic Line Modules, depending on the line short-circuit power, a line reactor should be provided at the connection point. This reactor is available as standard in the Line Connection Module. However, it can be omitted if it is not required (option L22).
For additional information, please refer to the SINAMICS Low Voltage Engineering Manual.