1 2
1 2
1 2
1 2
1 2
Function
Display shows
Pressed pushbutton
Corresponding
Type of relay
LED
Trigger signal for the fault recorder
TEST, P_UP, A_PI, TRIP
<SELECT/RESET><+><->
FR
Number of fault occurences
S=2, S=4, S=8
<SELECT/RESET><+><->
FR
Display of date and time
Y=99, M=10, D=1,
<SELECT/RESET><+><->
h=12, m=2, s=12
Software version
First part (e.g. D02-)
<TRIP>
Sec. part (e.g. 6.01)
one time for each part
Manual trip
TRI?
<TRIP>
three times
Inquire password
PSW?
<SELECT/RESET>/
<+>/<->/<ENTER>
Relay tripped
TRIP
<TRIP> or fault tripping
Secret password input
XXXX
<SELECT/RESET>/
<+>/<->/<ENTER>
System reset
CSPC
<SELECT/RESET>
for about 3 s
TTTTTable 5.1: possible indication messages on the display
able 5.1: possible indication messages on the display
able 5.1: possible indication messages on the display
able 5.1: possible indication messages on the display
able 5.1: possible indication messages on the display
5.2 Setting procedure
In this paragraph the settings for all relay parameters are
described in detail. For parameter setting a password has
to be entered first (please refer to 4.4 of description “MR-
Digital Multifunctional Relays”).
5.3 Systemparameter
5.3.1 Display of residual voltage U
E
as
primary quantity (U
prim
/U
sec
The residual voltage can be shown as primary measuring
value. For this parameter the transformation ratio of the
VT has to be set accordingly. If the parameter is set to
“sek”, the measuring value is shown as rated secondary
voltage.
Example :
The voltage transformer used is of 10 kV/100V. The
transformation ratio is 100 and this value has to be set
accordingly. If still the rated secondary voltage should be
shown, the parameter is to be set to 1.
5.3.2
ΔΔΔΔΔ
/Y - Switch over
Depending on the mains voltage conditions, the input
voltage transformers can be operated in delta or Y
connection. Change-overs are effected via the <+> and
the <-> keys and stored with <ENTER>.
5.3.3 Setting of nominal frequency
For proper functioning it is necessary to first adjust the
rated frequency (50 oder 60 Hz).
For this a distinction has to be made between the settings
v = 50 Hz / f = 50 Hz or v = 60 Hz / f = 60 Hz
The difference lies in the method of voltage measuring.
With the setting “v” = 50/60 Hz voltage measuring is
independent of the existing frequency. This means, the
voltage value can be correctly measured between 30 Hz
and 80 Hz without adverse effects from the frequency.
With the setting “f” = 50/60 Hz the measured voltage
value is influenced by the frequency. (see Table 5.2)
This difference in settings is required for the fault
recorder. If the fault recorder is to be used, the setting
must be f = 50 Hz or f = 60 Hz.
The different designations “f” or “v” have no influence on
any of the other functions.
All frequency functions are determined by setting the
nominal frequency, i.e. whether the set frequency
thresholds are evaluated as over or under frequency (see
also chapter 5.4.4). Also the cycle duration (20 ms at 50
Hz and 16.67 ms at 60 Hz) derives from this setting which
determines the minimum tripping delay for frequenc y
elements f
1
- f
3
with an adjustable multiplier (see also
chapter 5.4.5).
During setting of the nominal frequency a value in Hz is
shown on the display.
Declination of measuring value at 50Hz
Declination of measuring value at 60Hz
[%]
100.5
100.0
44
46
48
50
52
54
56
[Hz]
99.5
99.0
98.5
98.0
97.5
54
56
58
60
62
64
66
[Hz]
[%]
100.5
100.0
99.5
99.0
98.5
98.0
97.5
