Gen3 Passive Component Setup

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Vref = 3.3V

CT Current Transformers

Sensor Range
(Rms Amps)
Burden Resistor
(Ω)
Calibration Coefficient
(theoretical)
Input rating (mA)
SCT-013-000 100 24 83.33 50
60 39 51.28 30
50 47 42.55 25.0
40 56.2 35.59 20.0
30 75 26.67 15.0
25 91 21.98 12.5
20 120 16.67 10.0
SCT-006 20A/25mA 20 47 17.02 25.0
SCT-019 200A/33mA 200 33 181.82 33.0
SCT-024 400A/100mA 400 12 333.33 100.0
SCT-031 600A/100mA 600 12 500.0 100.0


AC Voltage

All voltage reported as RMS value in the table below.

Sensor Range
@ sensor input
Range
@ board input
RD1 (Ω) RD2(Ω) Gain Resistor
RF (Ω)
Gain Resistor
RG (Ω)
Calibration Coefficient
(theoretical)
Any ac/ac adaptor
up to 14.5V output
(EU) 77DE-06-09: 290V
(UK) 77DB-06-09: 300V
(US) 77DA-10-09: 145V
14.5V 53.6kΩ 4.7kΩ 0 (EU) 77DE-06-09: 248.1
(UK) 77DB-06-09: 256.6
(US) 77DA-10-09: 124.04
ZMPT_1X_225* 329V 0.2V 22kΩ 4.7kΩ 281.65
ZMPT_1X_280 291V 0.145V 33kΩ 4.7kΩ 249.34
ZMPT_1X_140 145V 0.145V 33kΩ 4.7kΩ 124.67
  • ZMPT_1X_225 is no longer used. Listed here for reference.