Tahaddai da Kulaɗi Ƙauna na Gwaji-gwaji na 35kV a Cikin ƙasa

Bayanan Aiki

Dabbobi ZW7 - 40.5 na farkon karamin shi da kuma siffofin zafiya ce wanda yake fito a kan gida, tsohon fasalin uku, AC 50 Hz, wanda ke amfani da zafiya a matsayin muhimmin mutanen cutar. Ana amfani da shi domin kawo masu karamin shi da kuma hankali masu karamin shi a cikin tattalin karamin shi ta 40.5 kV, kuma yana da muhimmanci a wurare da ake yi ayyuka da dama.

Gagantaccen wannan babban aiki ce mai karfi, kamar yadda aka nuna a Filin 1. Karfi na faduwa ce karfi na tsakiyar zafiya, a kan ya fi tsakiyar zafiya, kuma karfi na kasuwa ce karfi na takam. Duk da cewa karfi na tsakiyar zafiya da kuma karfi na takam suna da zafiya mai kyau, suka fi tsakiyar zafiya da kuma karfi na takam. Fasalin uku suna fi tsakiyar karfi na biyu a kan filayi na biyu.

Fasalin uku na transformers na current suna fi tsakiyar filayin a kan karfi na biyu, kuma suna haɗa da ci gaba na circuit breaker a kan fasalin uku na karfi na takam. An samun plaitoci a cikin filayin duk ofishin da kuma a baya don adabtara ga yanayi a kan gida.

Yawan tsakiyar zafiya an haɗa da shi a cikin shafin kokarin aiki da abubuwan insulasiya. Yadda ake yi ayyukan karo da karamin shi, kuma yadda ake yi kontrol da kuma hankali, ana haɗa shi a kan abubuwan kompoziti da terminali a kan box na mechanism. An samu ayyukan fasalin uku a kan tsakiyar aiki da kuma tsakiyar ayyuka.

Filin 1 Diagram mai cutar na vacuum circuit breaker

Bincike Masu Nemi Cewa

A ranar 18 ga Maris, 2010, a lokacin da ake yi ayyukan adadin rayuwar da ake yi a kan aikinsu a wata substation, an samu cewa an yi cutar da tsakiyar zafiya a fasalin A na 3515 vacuum circuit breaker (model: ZW7 - 40.5/T1250 - 25) a lokacin da ake yi testin cutar da AC.

Masu testin sun yi bincike da kuma testin masu nemi cewa a fasalin A na 3515 circuit breaker. Abubuwan bayanai na musamman suna nufin a Filin 1:

Idan ake iya bayyana da tashizaban testin daɗi na State Grid Corporation, insulation resistance na vacuum circuit breakers a 35 kV da kusa ba za a zama ƙarin da 3000 MΩ, kuma AC withstand voltage test voltage ba za a zama 80% na factory-tested value, haka muna 76 kV/min. Kafin ake yi testin cutar da AC a 3515 vacuum circuit breaker, insulation resistance na main circuit a fasalin uku suna daidai da tashizaban tashizaban.

Sannan, masu testin sun yi testin cutar da AC a main circuits na fasalin uku. An samu cewa idan jirgin fasalin A ya zama 35 kV, karamin shi ya ɗauki waɗanda ake yi cutar da shi.

Ba da wannan alamomin da suka faru, masu testin sun yi waɗannan testin daɗi a kan gabatar da wannan model na circuit breaker:

• An yi karo a vacuum circuit breaker, kuma an yi testin insulation resistance a karfi na faduwa na circuit breaker. Abubuwan bayanai na testin suna daidai da tashizaban tashizaban, wanda ya tabbatar da cewa abu da muhimmanci ce a karfi na kasuwa.

• An yi testin insulation resistance a karfi na kasuwa. Abubuwan bayanai na testin ba su daidai da tashizaban tashizaban, wanda ya tabbatar da cewa abu da muhimmanci ce a karfi na kasuwa.

• Karfi na kasuwa suna da karfi na kasuwa, insulating tie-rod, da kuma supporting porcelain vase. Saboda haka, masu testin sun yi karo a crank arm a kan insulating tie-rod da supporting porcelain vase, kuma sun yi testin insulation resistance a insulating tie-rod da supporting porcelain vase. Insulation resistances na supporting porcelain vase da insulating tie-rod suna daidai da tashizaban tashizaban, wanda ya tabbatar da cewa abu da muhimmanci ce a karfi na kasuwa.

• Karfi na kasuwa suna da vacuum insulating grease da kuma current transformers. Tabbatar da cewa ƙarfin insulation resistance ya zama saboda ƙarfin zafiya na vacuum insulating grease da kuma cutar da current transformers.

Tattalin Nemi Cewa

A ranar 31 ga Oktoba, 2010, masu sayarwa sun yi karo da kuma tattalin fasalin A na circuit breaker. Tsari na testin da kuma abubuwan bayanai suna nufin:

• An yi karo a karfi na faduwa da support na vacuum circuit breaker, kuma an yi testin insulation resistance a cikin supporting porcelain vase. Abubuwan bayanai na testin suka tabbatar da cewa binciken da ake yi a ƙarfin ita ce mai daidai.

• An yi karo a vacuum insulating grease da kuma current transformers na vacuum circuit breaker, kuma an yi testin insulation resistance a cikinsu. Insulation resistance na vacuum insulating grease ya zama kusan 50 M&Ω, kuma insulation resistance na current transformers suna daidai da tashizaban tashizaban. Wanda ya tabbatar da cewa cutar da shi ya zama saboda vacuum insulating grease.

• Ba da ƙarfin vacuum insulating grease, an yi testin insulation resistance da kuma AC withstand voltage a fasalin A na vacuum circuit breaker. Abubuwan bayanai na testin suna daidai da tashizaban tashizaban.

 Takamaimawa

Insulation na farko na ZW7 - 40.5 type vacuum circuit breaker suna amfani da vacuum insulating grease, wanda yana da mutanen zafiya. A lokacin da ake yi ayyukan da kuma fitowa aikinsu, ƙarfin zafiya na liquid medium ya zama ƙarin. Zafiya na liquid medium suna cika a matsayin "bridge" a kan electric lines of force.

Wannan "bridge" na zama ta fi cutar da shi, wanda yana iya ƙaranta cutar da shi da kudace. Wannan tana bayyana cewa insulation resistance ya zama ƙarin da 5 kV a lokacin da ake yi testin insulation resistance, amma wannan alamomin ba a sanar da shi a lokacin da ake yi a operating voltage.

Idan ake iya bayyana da binciken da ake yi, don haka ake buƙatar da waɗannan takamaimawa don ƙaranta cutar da shi da kuma ƙarfin zafiya na vacuum insulating grease na vacuum circuit breaker:

• Fitowa aikinsu a cikin tsari na assembly process don ƙaranta cewa abubuwan impurities ba su ka ƙoƙarin da kuma medium ba su ka ƙoƙarin da atmosphere. 

• Ƙaranta ayyukan da kuma yi testin partial discharge a kan tester na ultraviolet.

• Yi testin daɗi a kan tashizaban electrical test, sama da seal-tightness testing, vacuum-degree testing, insulation testing, k.s.