Satec PM130P Reference Guide

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b) Assume device settings (wiring via PT): Wiring 4LN3; PT = 120; CT primary current = 200A; Voltage
scale = 144V.
Active Power engineering scales (see Section 4):
ENG_HI = Pmax = Vmax × Imax × 3 = (144 × 120) × (200.00 × 2) × 3/1000 = 20,736kW
ENG_LO = -Pmax = -20,736kW
If the raw data reading is 12000 then the power reading in engineering units will be as follows:
Watts reading = (12000 - (-32768)) × (20,736 - (-20,736))/(32767 – (-32768)) +
(-20,736) = 7,594kW
If the raw data reading is -5000 then the power reading in engineering units will be as follows:
Watts reading = (-5000 - (-32768)) × (20,736 - (-20,736))/(32767 – (-32768)) +
(-20,736) = -3,164kW
4. Power Factor readings
Power factor engineering scales (see Section 4):
ENG_HI = 1.000.
ENG_LO = -1.000.
If the raw data reading is 29166 then the power factor in engineering units will be as follows:
Power factor reading = (29166 - (-32768)) × (1.000 - (-1.000))/(32767 –(-32768)) +
(-1.000) = 0.89
Provided by Northeast Power Systems, Inc.
www.nepsi.com

Satec PM130P Specifications

General

Brand	Satec
Model	PM130P
Category	Measuring Instruments
Language	English