Parameters
Such a Switch-OnTo-Fault application can easily be realized using the
Adaptive Parameter
features above
mentioned: The standard time overcurrent protection element (e.g. 51P) normally works with an inverse curve
type (e.g. ANSI Type A), while in case of
SOTF
condition, it should trip instantaneously. If the
SOTF
logic
function »SOTF
ENABLED
« is detecting a manual circuit breaker close condition the relay switches to
AdaptiveSet1
if the signal »SOTF.
ENABLED
« is assigned to
AdaptiveSet1
. The corresponding
AdaptiveSet1
will
become active and that means e.g. »
curve type = DEFT«
and »
t = 0«
sec.
EN MRU4 10/09
Page 197
