Kuv muaj daim ntawv tshaj tawm DGA nrog ntau ntawm xya gases. Kuv yuav hloov cov lej no li cas rau kev kuaj mob?
A: Peb qhov kev lees paub thoob ntiaj teb kev sib piv txoj kev hloov cov roj concentration rau hauv hom kev kuaj mob. Siv tag nrho peb rau kev hla - pov thawj.
Txoj Kev 1: IEC 60599 / IEEE C57.104 Duval Daim duab peb sab (feem ntau siv)
|
Zone |
Hom txhaum |
Hom Gas Kos Npe |
|
PD |
Kev tso tawm ib nrab |
H₂ dominant, me CH₄ |
|
D1 |
Tsawg- tawm hluav taws xob (tws) |
C₂H₂> 4% ntawm tag nrho HC |
|
D2 |
Siab - zog tawm (arcing) |
C₂H₂ + C₂H₄ dominant |
|
T1 |
Thermal txhaum <300 degree |
CH₄ + C₂H₆ tseem ceeb |
|
T2 |
Thermal txhaum 300℃-700 degree |
C₂H₄ > CH₄ |
|
T3 |
Thermal txhaum> 700 degree |
C₂H₄ + H₂ siab |
|
DT |
Thermal + hluav taws xob (sib xyaw) |
Cov qauv sib xyaw |
Txoj Kev 2: IEEE C57.104 Gas Concentration Limits
|
Roj |
Qhov xwm txheej 1 (Normal) |
Xwm Txheej 2 (Ceev faj) |
Yam 3 (Alert) |
Hom 4 (High Risk) |
|
H₂ |
Tsawg dua lossis sib npaug li 100 ppm |
101-200 ppm |
201-300 ppm |
>300 ppm |
|
CH ₄ |
Tsawg dua lossis sib npaug li 75 ppm |
76-125 ppm |
126-200 ppm |
>200 ppm |
|
C₂H₄ |
Tsawg dua lossis sib npaug li 100 ppm |
101-200 ppm |
201-300 ppm |
>300 ppm |
|
C₂H₂ |
Tsawg dua lossis sib npaug li 3 ppm |
4-10 ppm |
11-35 ppm |
>35ppm ua |
|
CO |
Tsawg dua lossis sib npaug li 350 ppm |
351-570 hli |
571-900 hli |
>9 00ppm |
|
TDCG |
Tsawg dua lossis sib npaug li 720 ppm |
721–1,920 ppm |
1,921–4,630 ppm |
>4,630 pwm |
Diagnostic workflow:
1. Sib piv txhua cov pa roj rau IEEE C57.104 Cov xwm txheej theem → ntsuas qhov ceev.
2. Xam Duval Daim duab peb sab ratios → txheeb xyuas hom txhaum.
3. Hla-xyuas nrog cov roj sib piv tseem ceeb (Rogers/Doernenburg).
4. Txheeb xyuas cov xwm txheej keeb kwm yav dhau los - yog qhov hloov pauv nrawm?
5. Yog hais tias tsis meej pem los yog tiam tus nqi> 30% / hli, txo sampling lub sij hawm.