Kev kuaj hipot tau ua tiav, thiab HV tawm. Kuv puas tuaj yeem taug kev thiab kov cov khoom kuaj tam sim no?
Tsis yog kiag li. Lub zog khaws cia hauv cov qauv tuaj yeem ua rau tuag taus: E=½ × C × V². Piv txwv li: 50 nF ntawm 100 kV=250 Joules (threshold threshold ≈ 10 J).
Yuav tsum tau ua 7-kauj ruam tso tawm (IEEE 510 §5.3):
|
Kauj ruam |
Kev ua |
Duration |
Kev xav |
|
1 |
Txo HV mov rau xoom (ramp down) |
2–3 s |
Tiv thaiv qhov hluav taws xob overshoot |
|
2 |
Tua HV mov, disconnect input zog |
Tam sim ntawd |
Tiv thaiv kom rov- zog |
|
3 |
Tos (capacitive tus kheej- tso tawm) |
Ntau dua lossis sib npaug li 60s |
Initial los ntshav los ntawm cov ntshav resistors |
|
4 |
Siv ib lub pas hauv av nrog lub resistor rau HV |
Tuav 10 s |
Tswj kev tso tawm txwv tam sim no spike |
|
5 |
Txav tus pas mus rau qhov chaw ze tshaj plaws hauv av |
2–3 s |
Paub meej ntawm lub peev xwm hauv av |
|
6 |
Luv -circuit & av HV + LV ua ke nrog tooj liab braid |
Tawm hauv qhov chaw |
Tiv thaiv recharge los ntawm kev nqus |
|
7 |
Tos 2 min → txheeb xyuas nrog tsis yog - tus neeg ntes |
Ntau tshaj lossis sib npaug li 2 min |
Dielectric absorption rov qab voltage |
Grounding stick specifications:
• Insulating ncej ntsuas rau qhov ntsuas voltage. Tawm tawm resistor: 5-20 kΩ
• Hauv av cable: 16–35 mm² tooj liab braid, ntev Less tshaj los yog sib npaug li 5 m.
Dielectric absorption (rov qab voltage):
• Daim ntawv / roj rwb thaiv tsev re- absorbs charge → terminals re-energize rau 20–40% ntawm qhov ntsuas voltage hauv 1-2 min.
• Tshem tawm → tos 2 min → xyuas → yog tias qhov hluav taws xob rov qab, tso tawm dua.
• Rov ua dua kom txog thaum voltage nyob <50 V tom qab 2 min.
TSIS MUAJ:
❌ Kov lub HV davhlau ya nyob twg tam sim tom qab cov khoom tsis raug.
❌ Siv lub hau ntswj/ liab qab hlau kom luv -circuit HV (uncontrolled arc + shockwave).
❌ Tshem tawm yam tsis muaj cov resistor (cov qauv puas + arc flash).
❌ Xav tias cable / TX tus kheej - tso tawm tom qab 30 s (ntev cables: 5-30 min).