EQUATION1708 V1 EN (Equation 65)
The setting Angle1(2) gives the characteristic angle giving maximum sensitivity of the
power protection function. The setting is given in degrees. For active power the set
angle should be 0° or 180°. 0° should be used for generator low forward active power
protection.
Operate
Angle1(2) = 0
°
Power1(2)
P
Q
en06000556.vsd
IEC06000556 V1 EN
Figure 73: For low forward power the set angle should be 0° in the underpower
function
TripDelay1(2) is set in seconds to give the time delay for trip of the stage after pick up.
The possibility to have low pass filtering of the measured power can be made as shown
in the formula:
( )
1
Old Calculated
S k S k S= × + - ×
EQUATION1893 V1 EN (Equation 66)
Where
S is a new measured value to be used for the protection function
S
old
is the measured value given from the function in previous execution cycle
S
Calculated
is the new calculated value in the present execution cycle
k
is settable parameter
1MRK 505 291-UEN A Section 6
Current protection
151
Application manual
To Next Page
Loading...
Need help?
General
