Siemens SINAMICS DCM Operating Instructions Manual page 74

Control module for variable-speed dc drives

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6.4 Connecting the external power unit

Please refer to the next section for options on how to position the two plates and how the

unit can be divided.

The following electrical connections between the power unit (line voltage) and the

electronics must have short-circuit protection:

• Secondary sides of the firing pulse transformers

• Voltage measurement equipment

• Fuse monitoring equipment

Short-circuit protection measures must be implemented when laying these cables (which

carry a line voltage). The rms currents in the cables referred to are lower than 0.5 A.

Short-circuit proof cables which burn from the inside when overloaded without bursting

their insulation

Cables protected as close to the power unit as possible with fuses. Fuses must have the

required cut-off capacity!

SINAMICS DCM Control Module

Operating Instructions, 06.2010, C98130-A7067-A1-02-7619