Arcteq AQ-S215, Instruction Manual

Page: 93 / 289

Figure. 5.3.1 - 75. CBFP when "Current and DO" is the selected criterion.
When the current threshold setting of I
set
and/or I0
set
is exceeded, the current-based protection is
activated. At the same time, the counter for CBFP is halted until the monitored output contact is
controlled (that is, until the primary protection operates). When the tripping signal reaches the primary
protection stage, the CBFP counter starts calculating the set operating time. The tripping of the
primary protection stage is constantly monitored in this configuration. If the current is not reduced
below the setting limit or the primary stage tripping signal is not reset, a CBFP signal is sent to the
incomer breaker. The time delay counter for CBFP is reset as soon as the measured current is below
the threshold settings or the tripping signal is reset. This configuration allows the CBFP to be controlled
by current-based functions alone, and other function trips can be excluded from the CBFP functionality.
A AQ Q-S215 -S215
Instruction manual
Version: 2.04
92