Fault loop impedance measurement
1. Z LINE: line impedance phase-neutral / phase (METREL MI 3100 s)
2. Z LOOP: impedance of the fault loop phase / earth (METREL MI 3100 s)
3. Zs rcd: impedance of the fault loop with low test current (METREL MI 3100 s)
4. Zs: impedance of the fault loop with high test current (Thytronic Impmeter2).
Item: Multifunction Tester
Model: METREL MI 3100 s + Thytronic Impmeter2
Reference Laboratory: ISO IEC 17025 accreditated laboratory or NMI
Measurement points:
| Metrel | Measurement points |
|---|---|
| Z line | 0.50 Ω – 1.80 Ω – 5.00 Ω – 50.0 Ω – 100.0 Ω – 180 Ω |
| Z loop | 0.50 Ω – 1.80 Ω – 5.00 Ω – 50.0 Ω – 100.0 Ω – 180 Ω |
| Zs rcd | 0.50 Ω – 1.80 Ω – 5.00 Ω |
| Impmeter2 | Measurement points |
|---|---|
| Zs | 100 mΩ -130 mΩ – 200 mΩ – 0.900Ω |
Reference Laboratory CMC:
| Value | CMC |
|---|---|
| Da 0.01 Ω a 0.2 Ω | 2 mΩ |
| Da 0.2 Ω a 1 Ω | 8.3 mΩ + 6.1 x 10^-3 x IZI |
| 1 Ω | 10 mΩ |
| 1,8 Ω | 18 mΩ |
| 5 Ω | 30 mΩ |
| 10 Ω | 60 mΩ |
| 18 Ω | 100 mΩ |
| Value | CMC |
|---|---|
| 50 Ω | 300 mΩ |
| 100 Ω | 500 mΩ |
| 180 Ω | 1 Ω |
| 500 Ω | 2.5 Ω |
| 1 kΩ | 5 Ω |
| 1,8 kΩ | 10 Ω |
Note: Indications regarding organizational methods, presentation and sending of results will be reported in the PT participation protocol
Scheduled start date for PT: September 2023
Payment: by bank transfer