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Sensed Currents
Note: Control only, does not include sensor tolerance, but
does include the phase current summing process.
Phase Current—Individual Phase Currents:
Range: 1 A to 10,000 A for 500:1 CTs
2 A to 20,000 A for 1000:1 CTs
4 A to 40,000 A for 2000:1 CTs
Accuracy:± 1 mA from 10 mA to 125 mA
0.8% from 125 mA to 1600 mA
(Control only, does not include sensor
tolerance.)
Ground Current—Vector Sum of Three-Phase Currents:
Range: 1 A to 5,000 A for 500:1 CTs
2 A to 10,000 A for 1000:1 CTs
4 A to 20,000 A for 2000:1 CTs
Accuracy: ± 3 mA from 10 mA to 125 mA
2.4% from 125 mA to 1600 mA
Sensed Source Voltages
Three-phase voltages used in voltage, power and power-
factor related calculations:
Voltage measurement accuracy:
± 0.4V from 5V to 80V
0.5% from 80V to 135V
S280-79-10
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INPUT ACCURACY