Woodward HighPROtec MCDLV4, Manual

Page: 985 / 1275

Protective Elements
PQS - Power [32, 37]
Available stages:
PQS[1] ,PQS[2] ,PQS[3] ,PQS[4] ,PQS[5] ,PQS[6]
Each of the elements can be used as P<, P>, Pr>, Q<, Q>, Qr>, S< or S> within the device planning.
P< and P> are settable and effective in positive active power range, Q< and Q> in positive reactive power range.
These modes are used for protecting against underload or overload in positive power direction.
The apparent power makes S< or S> effective like a circle in all power quadrants. Protection is against underload
and overload.
In reverse mode, Pr> is effective in negative active power range and Qr> in negative reactive power range. Both
modes protect against power direction reversing from positive into negative direction.
The following graphics show the areas that are protected by the corresponding modes.
985 MCDLV4 DOK-HB-MCDLV4-2E