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 | 0Ω | ∞ | 22kΩ | 4.7kΩ | 281.65 |
| ZMPT_1X_280 | 291V | 0.145V | 0Ω | ∞ | 33kΩ | 4.7kΩ | 249.34 |
| ZMPT_1X_140 | 145V | 0.145V | 0Ω | ∞ | 33kΩ | 4.7kΩ | 124.67 |
- ZMPT_1X_225 is no longer used. Listed here for reference.