502 069 02
Manual
Power Monitor, PD 3260
45/79
Precise function description:
After reset:
SwitchEnable := False;
OutFlag := False;
Loop
IF (SwitchEnable = True) AND (ABS(PhaseSpeed) <= StartSpeed)
THEN OutFlag := True at calculated time when PhaseSpeed = 0;
IF SwitchEnable = False THEN OutFlag := False;
End
Synchronous generator switch (Functions = $20)
The generator speed and acceleration is measured via the generator voltage input UrGEN.
When the generator has obtained the configured StartSpeed, the moment in time when line and
generator voltages will be in phase is calculated and compensated by the configured relay Start-
Delay.
The switch function is enabled by setting SwitchEnable = True. The output selected in Ref_A is
switched on at the calculated instant, and is switched off by setting SwitchEnable = False.
Precise function description:
After reset:
SwitchEnable := False;
OutFlag := False;
Loop
IF (SwitchEnable = True) AND (ABS(PhaseSpeed) <= StartSpeed)
THEN OutFlag := True at calculated time when Phase = 0;
IF SwitchEnable = False THEN OutFlag := False;
End
Ref_A:
Ref_A holds the number of the channel to be controlled. If a Digital I/O Channel is selected, it
must be configured as an output (Functions = $10). If the Thyristor Switch Channel is selected,
it must be enabled, and two or more of the digital I/O´s must be configured to be controlled by
the Thyristor Switch channel (Functions = $40 for the digital output channels).
SWNo $BA: TachoScale.
The TachoScale variable is only used when an asynchronous generator is selected in the
Functions configuration.
The scale factor that converts the tachometer frequency to generator voltage frequency is
configured in the TachoScale variable. For best results, choose a tachometer giving a pulse
frequency equal to the generator frequency at nominal generator speed i.e. TachoScale = 1.
