tWindowHunt: Setting of the time window for the window hunting function. This
function is activated when the number of contradictory commands to the tap changer
exceeds the specified number given by NoOpWindow
within the time tWindowHunt.
NoOpWindow: Setting of the number of contradictory tap changer operations (RAISE,
LOWER, RAISE, LOWER etc.) required during the time window tWindowHunt to
activate the signal HUNTING.
Power
P>: When the active power exceeds the value given by this setting, the output
PGTFWD will be activated after the time delay tPower. It shall be noticed that the
setting is given with sign, which effectively means that a negative value of P> means
an active power greater than a value in the reverse direction. This is shown in figure
295 where a negative value of P> means pickup for all values to the right of the
setting. Reference is made to figure 290 for definition of forward and reverse direction
of power through the transformer.
IEC06000634 V2 EN-US
Figure 295: Setting of a negative value for P>
P<: When the active power falls below the value given by this setting, the output
PLTREV will be activated after the time delay tPower. It shall be noticed that the
setting is given with sign, which effectively means that, for example a positive value of
P< means an active power less than a value in the forward direction. This is shown in
figure
296 where a positive value of P< means pickup for all values to the left of the
setting. Reference is made to figure 290 for definition of forward and reverse direction
of power through the transformer
.
IEC06000635 V2 EN-US
Figure 296: Setting of a positive value for P<
1MRK 502 071-UUS A Section 15
Control
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 639
Application manual
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