26
Operating Instructions
Power and Energy Computation
Every pulse from the meter corresponds to a fixed amount of energy. Power (watts) is energy
divided by time, which can be measured as pulses per second (or pulses per hour). The following
scale factor tables and equations convert from pulses to energy (watt-hours or kilowatt-hours) for
different models.
If you have ordered a custom full-scale pulse output frequency, then see the
section below. For
Option PV (Photovoltaic)
, see
Manual Supplement MS-10: Option PV
for scale factors.
Scale Factors - Standard Bidirectional Outputs (and Option DPO)
The following table provides scale factors for standard bidirectional output models with a full-
scale pulse output frequency of 4.00 Hz. This table also works for 4.00 Hz models with
Option
DPO
. Equations to compute power and energy follow the scale factor tables.
CT Size
(amps)
Watt-hours per pulse (
WHpP
)
Pulses Per kilowatt-hour (
PpKWH
)
3Y-208
3D-240
3Y-400
3D-400
3Y-480
3D-480
3Y-600
3Y-208
3D-240
3Y-400
3D-400
3Y-480
3D-480
3Y-600
5
0.125
0.2396
0.2885
0.3615
8000.00
4173.91
3465.70
2766.57
15
0.375
0.7188
0.8656
1.0844
2666.67
1391.30
1155.24
922.190
20
0.500
0.9583
1.1542
1.4458
2000.00
1043.48
866.426
691.643
30
0.750
1.4375
1.7313
2.1688
1333.33
695.652
577.617
461.095
50
1.250
2.3958
2.8854
3.6146
800.000
417.391
346.570
276.657
60
1.500
2.8750
3.4625
4.3375
666.667
347.826
288.809
230.548
70
1.750
3.3542
4.0396
5.0604
571.429
298.137
247.550
197.612
100
2.500
4.7917
5.7708
7.2292
400.000
208.696
173.285
138.329
150
3.750
7.1875
8.6563
10.844
266.667
139.130
115.523
92.219
200
5.000
9.5833
11.542
14.458
200.000
104.348
86.643
69.164
250
6.250
11.979
14.427
18.073
160.000
83.478
69.314
55.331
300
7.500
14.375
17.313
21.688
133.333
69.565
57.762
46.110
400
10.000
19.167
23.083
28.917
100.000
52.174
43.321
34.582
600
15.000
28.750
34.625
43.375
66.667
34.783
28.881
23.055
800
20.000
38.333
46.167
57.833
50.000
26.087
21.661
17.291
1000
25.000
47.917
57.708
72.292
40.000
20.870
17.329
13.833
1200
30.000
57.500
69.250
86.750
33.333
17.391
14.440
11.527
1500
37.500
71.875
86.563
108.44
26.667
13.913
11.552
9.2219
2000
50.000
95.833
115.42
144.58
20.000
10.435
8.6643
6.9164
3000
75.000
143.75
173.13
216.88
13.333
6.9565
5.7762
4.6110
any
CtAmps
40
CtAmps
20.87
CtAmps
17.329
CtAmps
13.833
40,000
CtAmps
20,870
CtAmps
17,329
CtAmps
13,833
CtAmps
Table 5: Scale Factors - Bidirectional Outputs
Contact CCS for scale factors for models with full-scale pulse output frequencies other than 4.00
Hz.
