110
Working with Scheduled Data
10.7.1
Example, Totalizing Energy
1. For the first minute, A = +4 kWh. B = +2 kWh. C = -3 kWh. Total Energy = +3 kWh
(4 + 2 - 3)
Phase
Delivered (DEL)
Received (REC)
A
4
0
B
2
0
C
0
3
Total
3
0
2. For the second minute, A = B = C = +10 kWh.
Phase
Delivered (DEL)
Received (REC)
A
14
0
B
12
0
C
10
3
Total
33
0
3. For the third minute, A = B = C = -5 kWh.
Phase
Delivered (DEL)
Received (REC)
A
14
5
B
12
5
C
10
8
Total
33
15
4. For the fourth minute,
· · ·
5. For the fifth minute,
· · ·
Lastly, Net energy values for each phase and total can be computed at any time, once the data
are located in the computer. For example, if the net energy per phase is required for phase A, then
the REC entry may be subtracted from the DEL entry to get the net energy for that phase for that
period. Suppose the following values are recorded for the end of the fifth period:
Phase
Delivered (DEL)
Received (REC)
Net*
A
14
11
+3
B
17
5
+12
C
10
8
+2
Total
33
16
+17
* Calculated by user.
The net energy for phase A is 14 - 11 = 3 kWh
