Farkon kwallon tsaro na kablun dabbobi

Bincike da gida ya kai ita ce babu karfin zafi, amma ita ce bincike da zaka so ku fuskantar zafi mai sauye da ake iya samun shi a cikin binciken da ba suka so.

Tsawon bincike na kable mai tsari shida ita ce shekaru uku, kuma yana bukata a yi a nan bayan binciken da ba suka so. Kafin haka, binciken da za a yi ne bayan duk binciken da ba suka so an rasa.

Yanzu akwai kable mai tsari shida da ake amfani da su sunan cross-linked polyethylene (XLPE), wanda ke iya samun fadada masu kashi mai yawa da tsafta mafi girma ta tsarin kashi. Saboda haka, ana nufin cewa amfanan da suke zo sosai.

Akwai misali a nan kan kable mai tsari shida da 10 kV. Ba a tabbas lafiya bincike, ana yi daga cikin binciken da ba suka so, musamman kabiluwa na bincike ce ta fiyayi.

A yi sharhiyar zafi da yanar gizigiyar insulation resistance (megger), amma binciken da za a yi ne bayan duk binciken da ba suka so yana bukata series resonant test set.

Tsunukan da kabiluwar series resonance testing ce ma kadan, kuma ba su ne abubuwan da ake amfani da su ne a lokacin da aka faru. Ana amfani da su don shekaru miliyan.

Series resonance yana iya samun daidaito, kuma ana bayyana shi a cikin ilimin jirgin kashi na biyu. Kable mai tsari shida suna iya gudanar kashi a lokacin da ake saka tsari.

Saboda haka, ba a yi gudanar da kable mai tsari shida ba, kafin ya shiga kashi ko ba. Kafin ba shiga kashi, gudanar kashi da za a faru shi kawai yana iya kasance mafi yauwa!

Ba a yi matsalolin da ba ake duba, kafin ba a samu shi ba, ba a yi amfani da shi ba.

Kafin binciken da za a yi ne ya kunshi capacitance, ana haɗa inductor a nan a cikin kabiluwar bincike. Ana samun resonance tare da amfani da tsunukan inda inductive reactance (XL) yana iya duba capacitive reactance (XC).

Ana iya samun wannan resonance ta hanyar tsara inductance ko kabiluwar frequency. Yadda ake tsara inductance? Ya kunshi capacitance, saboda XL yana iya duba XC.

Kafin a san model da tsari na kable, ana iya samun capacitance daga cikin taulokin da suka fito ko kula da maimakon kable.

Kafin a yi kabiluwar frequency, ana amfani da rubutun classic f₀ = 1/(2π√LC), inda f₀ shine frequency resonance.

A frequency resonance, XL = XC, kuma voltage across inductor da capacitance na binciken yana iya duba. Wannan voltage shine Q times source voltage, inda Q shine quality factor, ko kuma voltage magnification factor.

Q value yana iya duba 120 (tattaunawa littattafin da suka fito don adadin daidai). Wannan yana yiwuwar da amfanan da suke zo sosai saboda yadda ake ci gaba da abin da ake amfani da su.

Series resonance equipment na musamman yana iya bayyana adjustable frequency range of 30–300 Hz, wanda ke taimaka wajen samun resonance point.

Daga baya, zan iya magana game da voltage da za a yi ne. Don kable mai tsari shida da 10 kV, preventive test voltage da za a bayyana shine 2U₀, da tsari na 5 minutes. A nan bincike ya fi rasa idan ba a samu discharge, breakdown, heating, smoke, ko unusual odor ba.

Akwai 10 kV cables da suka 6/10 kV da 8.7/15 kV. Da za su bayyana voltage da za a yi ne tun da model na kable.