IEC 61869-2 current transformer ratio, itemized burden and accuracy-limit-factor (ALF) / knee-point voltage (Vk) check. Saturation and transient analysis, metering accuracy class, thermal & mechanical withstand, multi-ratio taps and REF/differential ratio matching are advanced features.
IEC 61869-2
Generated
For preliminary engineering use only — always verify results against project-specific standards and a qualified engineer's review before use in a real design.
| Device | VA @ In | Resistance |
|---|---|---|
| Protection Relay | 2.50 VA | 2.500 Ω |
| Lead resistance (20 m, 2.5 mm²) | — | 0.280 Ω |
| Total | 2.50 VA (relay/meter) | 2.780 Ω |
| Fault level | Primary (A) | Secondary ideal (A) | Secondary at ALF limit (A) |
|---|---|---|---|
| 0.2× In | 80 | 0.20 | 0.20 |
| 0.5× In | 200 | 0.50 | 0.50 |
| 1× In | 400 | 1.00 | 1.00 |
| 2× In | 800 | 2.00 | 2.00 |
| 5× In | 2,000 | 5.00 | 5.00 |
| 10× In | 4,000 | 10.00 | 10.00 |
| 20× In | 8,000 | 20.00 | 20.00 |
| 50× In | 20,000 | 50.00 | 20.00 |