CCS WattNode Pulse WNB-3D-240-P, Справочное руководство

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Operating Instructions 27
Scale Factors - Option P3: Per-Phase Outputs
The following table provides scale factors for Option P3 models with a full-scale pulse output
frequencies of 4.00 Hz for each phase. Note: with Option P3 , different phases can use different
CTs with different rated currents.
WARNING: Only use this table if you have Option P3 (Per-Phase Outputs)!
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 0.04167 0.07986 0.09618 0.12049 24000.0 12521.7 10397.1 8299.71
15 0.1250 0.2396 0.2885 0.3615 8000.00 4173.91 3465.70 2766.57
20 0.1667 0.3194 0.3847 0.4819 6000.00 3130.43 2599.28 2074.93
30 0.2500 0.4792 0.5771 0.7229 4000.00 2086.96 1732.85 1383.29
50 0.4167 0.7986 0.9618 1.2049 2400.00 1252.17 1039.71 829.971
60 0.5000 0.9583 1.1542 1.4458 2000.00 1043.48 866.426 691.643
70 0.5833 1.1181 1.3465 1.6868 1714.29 894.410 742.651 592.837
100 0.8333 1.5972 1.9236 2.4097 1200.00 626.087 519.856 414.986
150 1.2500 2.3958 2.8854 3.6146 800.000 417.391 346.570 276.657
200 1.6667 3.1944 3.8472 4.8194 600.000 313.043 259.928 207.493
250 2.0833 3.9931 4.8090 6.0243 480.000 250.435 207.942 165.994
300 2.5000 4.7917 5.7708 7.2292 400.000 208.696 173.285 138.329
400 3.3333 6.3889 7.6944 9.6389 300.000 156.522 129.964 103.746
600 5.0000 9.5833 11.542 14.458 200.000 104.348 86.643 69.164
800 6.6667 12.778 15.389 19.278 150.000 78.261 64.982 51.873
1000 8.3333 15.972 19.236 24.097 120.000 62.609 51.986 41.499
1200 10.000 19.167 23.083 28.917 100.000 52.174 43.321 34.582
1500 12.500 23.958 28.854 36.146 80.000 41.739 34.657 27.666
2000 16.667 31.944 38.472 48.194 60.000 31.304 25.993 20.749
3000 25.000 47.917 57.708 72.292 40.000 20.870 17.329 13.833
any CtAmps
120.00
CtAmps
62.609
CtAmps
51.986
CtAmps
41.499
120,000
CtAmps
62,609
CtAmps
51,986
CtAmps
41,499
CtAmps
Table 6: Scale Factors - Per-Phase Outputs (Option P3)
Scale Factor Equations
Using the “Watt-hours per pulse” WHpP value from the table above for your model and current
transformer, you can compute energy and power as follows:
●
PulseCount - This is the count of pulses, used to compute energy. You can use the count of
pulses over specified periods of time (like a month) to measure the energy for that period of
time.
●
PulseFreq - This is the measured pulse frequency (Hertz) out of the meter. This can also be
computed by counting the number of pulses in a fixed period of time and then dividing by the
number of seconds in that time period. For example, if you count 720 pulses in five minutes
(300 seconds), then
PulseFreq = 720 / 300 = 2.40 Hz.
Energy (watt-hours) = WHpP
•
PulseCount
Power (watts) = WHpP
•
3600
•
PulseFreq
To convert these values to kilowatt-hours and kilowatts, divide by 1000.