14
Measured data
The values measured are indicated by the three
green digits to the right. An exception, how-
ever, is the measured frequency, for the indica-
tion of which all of the four digits of the display
can be used, see "Menu chart". The measured
value being presented on the display is indicated
by the yellow LEDs above the display.
LED indicator Measured data Measuring range
U Measured phase-to-phase voltage U
12
as a multiple of 0.0...1.40 x U
n
the rated voltage U
n
of the energizing input used.
f Frequency of the phase-to-phase voltage U
12
20.00...75.00 Hz
Recorded data
(modified 2002-06)
The left-most number of the display shows the
register address and the other three numbers the
value recorded. The structure of the registers is
presented in the section "Menu chart".
Register/ Recorded information
STEP
1 The measured phase-to-phase voltage U
12
as a multiple of the rated voltage U
n
.
The register is updated once a protection stage trips. Then the previous values are
moved one step forward in the memory stack, the oldest value being lost. The five
latest values are stored in the memory: the most recent value in the main register
and the other four values in the subregisters.
2 Register 2 records the frequency measured. The function of the register is the same
as that of register 1.
3 Register 3 records the rate of change of frequency measured. The function is the
same as that of register 1.
4 Register 4 records the maximum and minimum frequency and rate of change of
frequency. The maximum rate of change of frequency is the maximum positive
derivative of the frequency. Correspondingly, the minimum rate of change of fre-
quency is the maximum negative derivative of the frequency.
The order of the register is: f
min
, df
min
/dt, f
max
and df
max
/dt.
5 Register 5 records the number of the stage that performed tripping and the timer
from which tripping originated. The stages are numbered from 1 to 4 and the
timers from 1 to 2, so possible values will be 0, 11, 12, 21, 22, 31, 32, 41 and 42.
The function of the register is the same as that of register 1.
6 Start counters for stages 1...4.
0 Display of external control inputs.
The number to the right on the display indicates the status of the external control
signals of the relay module. Each control signal has its own weighting factor. The
number indicated on the display is the added weighting values of the active signals
as follows:
Weighting Active signal
value BS1 BS2 BS3 BS4 BS5
0
1x
2x
4x
8x
16 x
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