Advertisement
Statistics data (Peak-demand value group)
Similar to the demand feature (Demand value group), the user can have another peak-demand
feature that provides the Max/Min/Ave data that can be obtained from the initialized time to
the current time; note these data have been calculated from the first energizing moment of the
IED. That is, the data of the peak-demand feature gets to have the latest values in every cycle;
the data will be replaced if the past data is not needed. The user can find that the nature of
the collected values in the peak-demand values being identical to the one of the Demand value
group.
Max/Min/Averaged information about the peak-demand feature
9.5.1
Maximum value
(i)
The peak-demand feature starts to collect the data in every cycle after the IED energized; the
peak-demand feature will have the largest data. If the present data is larger than the past one
with the peak-demand feature will replace the past one for the present one. The maximum
value will be cleared when the data is reset.
Minimum value
(ii)
Similarly, for the minimum value, the IED displays the smallest data after energizing; the data
will be replaced when the present data is smaller than the past one.
Averaged value
(iii)
The averaged value is computed using the data in the IED memory, the data which was
collected after energizing. Collecting data stays on for a long time; hence, when the counter
with regard to the data collection gets to be 2,147,483,647(=0x7FFFFFFF; almost 68 years),
resetting data is performed.
Resetting data of peak-demand features
9.5.2
The data will be cleared by the following operations:
(a)
To energize the IED or to make the initialization about the IED functions
(b)
To operate "Reset All Values" on the IED menu
Figure 9.5-1 Reset menu for Peak demand values
Peak Demand
10:48
1/2
Peak Demand Value >
Reset All Values +
- 786 -
6F2T0207 (0.01)
GRE200 (5,6)
Advertisement
