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
SMA Solar Technology AG
System Manual
MVPS22JP-SH-en-11
194
Summary of Contents for 1000-1SC
Page 257: ......
