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2. The "DEMAND TIME" (demand integration time) setting allows the selection of the integration interval
between 15, 30 or 60 minutes. The total length for the record register is immediately defined when this
selection is made. The length is 24 hours for 15 minutes, 48 hours for 30 and 96 hours for 60.
3. The "ACTIVE TABLE" setting for setting the number of the active settings table allows you to select which
of the three settings tables on the SMOR unit is active at a given moment. This selection can also be
carried out by means of digital inputs configured for this purpose. If there is a disagreement between this
setting and the input selection, the last one has priority over the table selection via setting.
4. To set the Breaker aging monitor function it is first necessary to set the "kI 2 t OP. MODE" (operation
mode) setting. If this is selected as "measured" no other setting is required, since the time used for the
calculation is the time measured by the unit from the trip order until the detection of a successful Breaker
opening. If the fixed mode is selected it is necessary to set the subsequent "I 2 t INTegration TIME" setting,
using the time desired for the calculations.
5. The cold load pick-up function "CLP PERMISSION" setting (if selected) requires the setting of the times
to change to and to return from table 3. These two settings are conditioned by the times set for the
recloser, in order to prevent unwanted operations of this function during a reclose cycle. Therefore the
minimum setting value for the change to table 3 will be the greatest of the settings for the reclosing times,
and the minimum value for the time to return from table 3 will be the value set as the reset time for the
recloser.
6. The "PREFAUL CYCLES" setting is the number of cycles before the oscillography trigger that the system
register (between 2 and 10 cycles). In any case the total number of cycles for an oscillography register is
preset at 66 cycles, regardless of the setting for the number of pre-fault cycles.
7. The difference between the "Function Permission" and "Trip Permission" settings is that, while the
Function Permission settings permit or completely disable the function, the Trip Permission setting allow
the possibility of enabling or disabling only the trips, thus allowing the function to remain active and
capable of generating events, alarms and signals.
8. The settings procedure for all the timed Overcurrent functions (51PT, 51NT, 46PT) is identical. In all
cases it is necessary to set the "- - - PICK-UP" pick-up threshold first, and then the type of timing chosen,
"CURVE" setting. If any of the inverse, very inverse and extremely inverse curves are selected, the curve
dial value in the "TIME DIAL" setting will be relevant; on the other hand, if the definite time setting is used
the time dial setting is ignored and the "DEFINITE TIME" setting is used.
9. The ranges for the Overcurrent units shown in the previous table (Table 6) correspond to a base range of
0.2 - 2.4 A, with 5 A transformers for the phase units and 1 A for the ground units. In the case of the
voltage units the ranges shown correspond to a nominal voltage 100/√3 to 220/√3 Vac. The other
possible ranges are defined in the model selection table. The variation in setting ranges among different
models in the same family only affects the Overcurrent functions (51PT, 51NT, 50PH, 50PL, 50NH, 50NL,
46PT). The instantaneous and negative sequence setting ranges maintain the same relation than the
timing units as described.
10.In the frequency group, the "INHIBITion Voltage" (minimum voltage supervision) setting establishes not
only the voltage threshold below which the frequency functions are inoperative, but it also establishes the
value below which no frequency measurement is shown for the unit.
11.The maximum and minimum voltage units are set, calculated and displayed as phase-to-phase voltages,
even if the unit is connected phase to ground.
12.In the reclose settings group, the "INIT 79 X - - -" reclose permission setting masks indicate the functions
with trips that can initiate the recloser, and the setting is valid for either of the programmed cycles. In the
same way, the "- - - TRIP AFTer 79" trip permission settings masks allow the identification of those
functions whose trip is permitted after any of the reclosing attempts.
The names used to describe the settings both for the local MMI and the communications program is limited
by the space available for the identifying texts. For reference, the following is a table of the names used for
each setting in the local display and the GE-LOCAL software.
GEK-105593C
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