Function Diagram - Siemens SINAMICS S150 NEMA Operating Instructions Manual

Functions, monitoring and protective functions
9.2 Active Infeed functions
Parameters
• r0069[0...8]
• p3624[0...1]
• p3625[0...1]
• r3626[0...1]
9.2.3 Variable power factor (reactive power compensation)
Description
Changing the reactive current allows the power factor of the cabinet unit to be set as
capacitive or inductive. The total setpoint is composed of the fixed setpoint p3610 and the
dynamic setpoint via the connector input p3611.
The reactive current can be changed by specifying a parameterizable supplementary
setpoint for the reactive current from a higher-level cosφ control.
Note
Direction of rotation
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.
Note
Limitation of the reactive current setpoint
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.

Function diagram

FP 8946
Parameters
• p3610
• p3611
502
Phase currents actual value
Infeed harmonics controller order
Infeed harmonics controller scaling
Infeed harmonics controller output
Current precontrol / current controller / gating unit (p3400.0 = 0)
Infeed reactive current fixed setpoint
CI: Infeed reactive current supplementary setpoint
Operating Instructions, 12/2018, A5E36652151A
Enclosed Drives