Reactive Current Control - Siemens SINAMICS S120 Function Manual

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Table of Contents

Alarm present

Master control by PLC

Pre-charging completed

Line contactor energized feedback

Reactive current control

A reactive current setpoint can be set to compensate the reactive current or to stabilize the

line voltage in infeed mode. The total setpoint is the sum of the fixed setpoint p3610 and the

dynamic setpoint via the connector input p3611.

The direction of rotation of the network is compensated automatically with reactive current

control. A negative reactive current setpoint causes an inductive reactive current; a positive

setpoint generates a capacitive reactive current.

The closed-loop control limits the reactive current setpoint dynamically in such a way that the

sum of the active current setpoint and the reactive current setpoint does not exceed the

maximum device current.

The reactive current consumption of the line filter selected in the configuration Wizard is

automatically covered by the Active Infeed closed-loop control. This means that the display

value of the current reactive current setpoint in r0075 no longer corresponds with the

parameterized total reactive current setpoint.

The reactive power setpoint of the Line Module with respect to the network can be derived

by multiplying the parameterized total reactive current setpoint by 1.73 * rated line voltage.

Drive functions

Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5

Internal status

1.1 Active Infeed

PROFIdrive telegram 370