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TD_MRN3-3_08.06_GB
5.4.3 Permissible release time for the
under voltage characteristic curve
The end of the failure incident is detected on condition
that the voltage had been above the voltage range for
at least the period of setting value t
R
. The characteristic
value calculation is interrupted then and any new fal-
ling below the starting threshold will be defined as a
new failure incident. The adjustable value is indicated
in green by LEDs Char1 or Char2 and value t
R
marked
accordingly, in red.
5.4.4 Plausibility check of the voltage
characteristic
The setting points are not independent from each
other. It is therefore recommended to parameterise
them in ascending order, which, in fact, agrees with
the unit's pre-adjusted parameter sequence. This, for
example, means that follow-up times can only be
higher than preceding ones. Voltage-related values,
however, are depending on their function. If, for ex-
ample, the factory set value of U<1 is higher than the
value of U<Start that has to be adjusted, U<1 will
automatically be set to the same value when U< is
adjusted.
(See chapter 3.2.2: Order of parameter setting or
chapter 7.3: Protection parameters.)