SMA SC 500HE-US - Manual (Page 44)

8 Reactive Power Regulation SMA America, LLC
44 SC500HEUS-eng-BE-BUS120320 Operating Manual
8.1.9 "PFCnstAnIn" Procedure
The reactive power target value is set at the input terminals using an analog signal for specifying the
target value (see the inverter installation manual). This is usually implemented by a ripple control
receiver.
The analog value is converted into a displacement power factor cos φ. The electrical current strength
of the connected signal determines the target value.
The analog measured values must be between 4 mA and 19 mA. If the analog signal is less than
2 mA, the error message will be displayed in the instantaneous value "Q-VArModFailStt".
The analog value is converted into a target value for the displacement power factor cos φ. Here, the
parameter "PFAbsMin" is the start and end point of the linear characteristic curve.
Signal Power limit Description
< 2 mA Last valid value,
or 1 after restart Signal is in the invalid range.
2 mA … 4 mA "PFAbsMin"/underexcited The maximum amount of negatively
excited reactive power is fed in.
4 mA "PFAbsMin"/underexcited Starting point of the curve
Maximum amount of negatively excited
reactive power is fed in.
11.5 mA 1 Zero-crossing of the curve
No reactive power is fed in.
> 19 mA "PFAbsMin"/overexcited End point of the curve
Maximum amount of positively excited
reactive power is fed in.
Parameter used "PFAbsMin"