Table 5 Typical standard values for dissolved gases (ppm)
From: Transformer faults in tanzanian electrical distribution networks: indicators, types, and causes
Standards | Gases values | ||||||||
|---|---|---|---|---|---|---|---|---|---|
CO2 | H2 | CO | CH4 | C2H6 | C2H2 | C2H4 | \({\mathrm{H}}_{2}\mathrm{O}\) | TDCG | |
IEEEC57.104–2019 | 9000 | 80 | 900 | 90 | 90 | 1 | 50 | NS | 720 |
IEC 60599–2015 | 4000–6000 | 50–150 | 400–600 | 30–130 | 20–90 | NIL | 60–280 | NS | 700–900 |
PLN-UIJBT | 6500 | 85 | 900 | 180 | 300 | 3 | 45 | NS | NIL |
TANESCO | < 2500 | < 400 | < 300 | < 100 | < 65 | < 1.5 | < 10 | < 20 | < 700 |