SMA MEDIUM VOLTAGE POWER STATION 500SC-JP - Displacement Power Factor Cos Φ Via Standard Signal: Pfcnstanin Mode

13.3.3.8 Displacement Power Factor cosφ via Standard Signal: PFCnstAnIn Mode
The reactive power setpoint is set at the input terminals for the setpoints via an analog signal. This is usually
implemented by a ripple control signal. The analog value is converted into a displacement power factor cos φ. The
electrical current strength of the connected signal determines the setpoint. The analog measured values must be
between 4mAand19mA. If the analog signal is less than 2mA, an error message will be displayed in the
instantaneous value Q‑VArModFailStt.
Signal Power limit Description
< 2 mA Last valid mean value or 0kVAr after
restart
Signal is in the invalid range.
2mA to 4mA
PFAbsMin/underexcited
The maximum amount of negatively excited reactive
power is fed in.
4 mA
PFAbsMin/underexcited
Start point of the characteristic curve
The maximum amount of negatively excited reactive
power is fed in.
11.5 mA 0 kVAr Zero-crossing of the characteristic curve
No reactive power is fed in.
> 19 mA
PFAbsMin / overexcited
End point of the characteristic curve
The maximum amount of positively excited reactive
power is fed in.
The analog value is converted into a setpoint for the displacement power factor cos φ. Here, the parameter PFAbsMin
is the starting and end point of the linear characteristic curve.
13 Function Description
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System ManualMVPS22JP-SH-en-11194