Tambayar da na iya kan abin da aka fi sani a tsakiyar karamin zafi na ZW32-12 Vacuum Circuit Breaker

Akwai amfani da ZW32 - 12 vacuum circuit breaker da yawa a tashar kungiyar zabe. Amma, yadda ake gina ZW32 - 12 vacuum circuit breakers na masu gine-gine suna dacewa. Wasu ZW32 - 12 vacuum circuit breakers suna kyau mai kudan, tare da abubuwa masu iya kasa cewa za su iya haifar da kasa ya zama wajen kawo zabe a wurin [1]. An yi ZW32 - 12 type vacuum circuit breaker na gaba da kyau, tsari mai tsawo da kuma tsaro, kuma an yi shi aiki da kudanci da kuma mai kudanci.

Amma a gaba-daya, zai iya samun abubuwan da suka faru saboda haifar da kasa, kungiyar kasa, ko karamin adadin kusa. Kawai ne ta hanyar hada kan tarihin amfani da shi da kuma yin hanyoyin sauki da ilimi don in haifar da kasa, za a iya kadan da kuma haifar da kasa na ZW32 - 12 vacuum circuit breakers. Tattalin al'adu na ZW32 - 12 vacuum circuit breakers da kuma yin hanyoyin sauki suna da muhimmanci wajen kadan da kasan amfani da shi.

Rana ranar da aka faru haifin da ya faru ya fi yawa. A lokacin amfani, an samu cewa babban B na switch da take faru ta kasance, wanda ya haifar da kasa na circuit breaker da take faru, kuma duk masu amfani a gaba na switch da take faru suka faru zabe a gaba daya. Babu daya da ya faru wa, kawai ne ya yi ayyukan sauki, ya nuna cewa an yi tripping na vacuum circuit breaker na gaba na switch da take faru, kuma an koye duk tushen da ke kafa da kasa da tushen da ke kafa da zabe na switch da take faru, kuma an yi bypass switch a fagen da kafin da kafin switch da take faru, wanda ya haifar da kasa na darasi daban-daban a lokacin da ya kai.

An fito switch da take faru daga rukuni. An samu cewa insulation resistance to ground na closing da opening na babban B na kafa da zabe na switch da take faru ya faru zero, amma insulation resistance to ground na kafa da kasa ya faru non-zero idan an yi opening (ba a yi amfani da tushen da ke kafa da kasa da tushen da ke kafa da zabe na circuit breaker, ana yi testin har zuwa babban ta hanyar megger). Daga ma'anarta, ana iya cewa akwai kasa na babban B na kafa da zabe na switch, kuma kafa da kasa na babban B ta shahara. Wannan haifin ya faru saboda kasa na kafa da zabe.

Daga baya da aka yi fitowa da koyewa switch, an samu cewa waje na arc-extinguishing chamber na insulating cylinder na babban B ya faru lafiya. Ba a yi koyewa insulating support na babban B, an samu cewa arc-extinguishing chamber ya faru da lafiya. Yanayin yanayi na disassembled parts na arc-extinguishing chamber shine: moving and stationary contacts na arc-extinguishing chamber ta shahara, ba a samu cewa akwai lafiya a tsakiyar, amma tsakiya ya faru mai dubu da kuma soot. Akwai lafiya a fagen da kafin da kafin shielding cylinder, da farkon tsarin da ya faru 180° a circumferential direction.

Akwai lafiya a stationary-end grading shield na shielding cylinder na stationary end, da kuma lafiya a moving-end bellows da bellows protection cover na moving end. Ceramic shell ya faru lafiya a fagen da kafin da kafin wasu lafiyan. Tsakiyar shielding cylinder ya faru mai dubu, amma waje na shielding cylinder da ya faru na lafiya a cikin. Ba a samu cewa akwai alamomin da ya faru a waje na ceramic shell da ya faru. Guide sleeve ya faru mai soft da kuma ya yi flowing downward. Flowing ya faru da kadan a fagen da kafin da kafin lafiya na moving end, da kuma ya faru mai boiling. Solidified guide sleeve ya kada moving conductive rod a open position.

Tambayar da Koyewar Haifin

Daga baya da aka samu tsakiyar moving and stationary contacts na arc-extinguishing chamber, ya faru cewa contacts ba suka faru da lafiya a atmospheric environment, kuma contacts ya faru a open state; tsakiyar shielding cylinder ya faru mai dubu, wanda ya faru saboda action of the arc da kuma air mai kudanci. Waje na shielding cylinder da ya faru na lafiya ba a samu cewa akwai discoloration saboda ba a samu cewa arc ya faru, wanda ya nuna cewa arc ya faru local ablation; gaps on both sides na stationary-end grading ring na arc-extinguishing chamber da stationary end na shielding cylinder ya faru da lafiya, wanda ya nuna cewa arc burning ya faru a wannan; gaps on both sides na moving end na shielding cylinder da protection cover na moving-end contact na arc-extinguishing chamber ya faru da lafiya, wanda ya nuna cewa arc burning ya faru a wannan.

Guide sleeve ya faru melting da kuma flowing marks, da kuma flowing ya faru da kadan da kuma ya faru mai boiling a fagen da kafin da kafin lafiya na moving end, wanda ya nuna cewa high temperature of the arc ya faru impact da wannan area da kuma ya faru da kadan; solidified guide sleeve ya kada moving conductive rod a open position, wanda ya nuna cewa switch ya yi operation a lokacin da haifin ya faru kuma switch ya faru a open state a gaba na haifin; contact surface ya faru soot deposit, wanda ya nuna cewa its temperature ya faru da kudanci a lokacin da arc ya faru kuma ba a samu cewa akwai arc burning a tsakiyar a gaba na accident development. Wannan ya nuna cewa switch ya faru a open state a gaba na fault. Accident process ya faru saboda:

Kafin haifin ya faru, vacuum interrupter ya faru saboda leakage, amma akwai vacuum mai kudanci, amma ba a samu cewa ya faru operating conditions na vacuum interrupter. Lokacin da haifin ya faru, circuit breaker ya faru a closed operating state, kuma contacts na interrupter ya faru closed. Idan babban B line na kafa da zabe na switch ya faru saboda kasa, switch ya faru automatic tripping.

Interrupters na phases A da C ta shahara da kuma ta yi breaking operation da kai. Interrupter na phase B, da vacuum degree da ba a samu cewa ya faru operating conditions, ya faru da ya yi extinguish da arc between the contacts successfully saboda a three-phase neutral-ungrounded system, idan biyu na phases ya faru breaking, phase na uku ya faru breaking.

Wannan ya nuna cewa contact surface ta shahara, ba a samu cewa akwai ablation even at the edges and corners. Arc combustion ba a faru completely confined between the two contacts, amma ya faru diffusion, wanda ya faru blackening of the inner wall of the shielding cylinder. Saboda inside na interrupter ya faru low-vacuum state, vacuum insulation ability ya faru extremely low. Wannan ya faru breakdown and arcing between the shielding cylinder and the moving-end bellows protection cover under the recovery voltage, kuma arc ba a faru controlled.

Shielding cylinder ya faru heating up severely, kuma potential ya faru change, wanda ya faru breakdown (breakdown at the weakest point) with the stationary-end shielding cover and generating an arc. Arc ya faru transfer from the moving end to the stationary end, forming a current path from the power supply to the ground and sustaining the arc combustion until the upper-level switch of this switch ya faru tripping and the arc extinguished. Akwai vacuum mai kudanci a vacuum interrupter, amma ba a samu cewa ya faru operating conditions saboda gas leakage before the fault occurred.

Lokacin da haifin ya faru, circuit breaker ya faru a closed-circuit operating state, kuma contacts na interrupter ya faru closed. Idan babban B line na kafa da zabe na switch ya faru saboda kasa, switch ya faru automatic tripping. Interrupters na phases A da C ta shahara da kuma ta yi breaking operation da kai. For the phase B interrupter, although the vacuum degree da ba a samu cewa ya faru operating conditions, arc between the contacts ya faru successfully extinguished.

Wannan ya nuna cewa contact surface ta shahara, ba a samu cewa akwai ablation even at the edges and corners. Arc combustion ba a faru completely confined between the two contacts, amma ya faru spread to some extent, wanda ya faru blackening of the inner wall of the shielding cylinder. Saboda inside na interrupter ya faru low-vacuum state, vacuum insulation capacity ya faru extremely low. Wannan ya faru breakdown and arcing between the shielding cylinder and the moving-end bellows protection cover under the recovery voltage, kuma arc ba a faru controlled.

Shielding cylinder ya faru heating up severely, kuma potential ya faru change, wanda ya faru breakdown (at the weakest point) with the stationary-end shielding cover and generating an arc. Arc ya faru transfer from the moving end to the stationary end, forming a current path from the power source to the ground and sustaining the arc combustion until the upstream switch of this switch ya faru tripping and the arc was extinguished.