Automatic Restart Function - Siemens SINAMICS G150 Operating Instructions Manual

Converter cabinet units 75 kw to 1500 kw

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Automatic restart function

The automatic restart function automatically restarts the cabinet unit after an undervoltage or

a power failure. The alarms present are acknowledged and the drive is restarted

automatically.

The drive can be restarted using:

● The standard procedure starting from standstill, or

● The flying restart function.

The flying restart function can also be activated for drives with large moments of inertia (such

as fan drives). This enables you to switch to the motor that is still rotating.

If p1210 is set to values >1, the motor can be restarted automatically without the need to

issue the ON command.

In the event of prolonged power failures and when the automatic restart function is

activated (p1210 > 1), the drive may have been at a standstill for a long time and

mistakenly considered to have been switched off.

For this reason, entering the area around the drive when it is in this condition can cause

death, serious injury, or considerable material damage.

Converter cabinet units

Operating Instructions, 03/2012, A5E03263466A

For drives with low moments of inertia and load torques facilitating the stopping of the

drive within a matter of seconds (e.g., pump drives with water gauges), starting from

standstill is recommended.

Functions, Monitoring, and Protective Functions

9.2 Drive Functions