Jiki na Overhead Conductor
Conductor shine wani abu mai kyau a taka shugaban kuli daga wurin zuwa wurin. Yana da muhimmanci a cikin masana'antar tsari na ƙarshen rikita da kuma jiragen. Zan iya zaba conductor ba ta hanyar adadin kaɗa da kuma tushen.
Yana da tushen kuli mai kyau.
Yana da tushen mai karfi don in taimaka da ƙaramin alama.
Yana da adadin kaɗa mai yawa (kaɗa / mita).
Yana da adadin kaɗa mai yawa ba ta sauransu biliyan.
Din daɗi ɗaya na Conductor na Ƙarshen Rikita
A lokacin daɗi, ana amfani da conductor na 'Cu' (copper) a cikin tsari na ƙarshen rikita don in taimaka da tushen mai karfi. Amma yanzu an fi saki da aluminium 'Al' saboda dalilai:
Yana da adadin kaɗa mai yawa da copper.
Yana bayyana girman tsari mai yawa don adadin kaɗa na kuli wanda ya yi tasiri a kan gudanar corona.
Corona: shine ionization na harkar sama saboda ƙarshen kuli mai yawa (ƙarshen kuli mai yawa da ya fi girma) wanda ya ba da ɗan kuli mai lafiya a kan conductor da kuma ɗan kuli mai fitaccen laba. Yana ba da gas oxygen da kuma yana ba da abubuwa mai yawa.
Aluminium tana da wasu abubuwa game da copper:
Yana da tushen kuli mai yawa.
Yana da girman tsari mai yawa wanda yake yi tasiri a kan area na samun sama da kuma yana ba da adadin kaɗa mai yawa. Saboda haka, yana buƙata da cross arms mai yawa wanda ke yi tasiri a kan adadin kaɗa.
Yana da tushen mai karfi mai yawa da kuma yana ba da sag mai yawa.
Yana da adadin kaɗa mai yawa (2.71gm/cc) da copper (8.9 gm/cc) cc = cubic centimeter.
Saboda tushen mai karfi mai yawa, aluminium ana amfani da wasu abubuwa ko alloys.
AAC (All Aluminium Conductor)
Yana da tushen mai karfi mai yawa da kuma sag mai yawa a kan span length.
Saboda haka, ana amfani da ita a kan span mai yawa, yana da amfani a kan level na distribution.
Yana da tushen kuli mai kyau a kan ƙarshen kuli mai yawa da ACSR, yana da amfani a kan level na distribution.
Adadin kaɗa na ACSR ana da AAC.
ACAR (Aluminium Conductor, Aluminium Reinforce)
Yana da adadin kaɗa mai yawa da AAAC amma pro to corrosion.
Yana da adadin kaɗa mai yawa.
AAAC (All Aluminium Alloy Conductor)
Yana da same construction da AAC except the alloy.
Tushensa ana da ACSR, amma saboda abin da steel, yana da kaɗa mai yawa.
Abin da formation of alloy makes it expensive.
Saboda tushen mai karfi mai yawa da AAC, ana amfani da ita a kan spans mai yawa.
Ana iya amfani da ita a kan level na distribution, misali river crossing.
Yana da sag mai yawa da AAC.
The difference between ACSR and AAAC is the weight. Being lighter in weight, it is used in transmission and sub-transmission where lighter support structure is required such as mountains, swamps etc.
ACSR (Aluminium Conductor Steel Reinforced)
Ana amfani da ita a kan spans mai yawa saboda sag mai yawa.
It may consist of 7 or 19 strands of steel surrounding by aluminium strands concentrically. The number of strands are shown by x/y/z, where ‘x’ is number of aluminium strands, ‘y’ is number of steel strands and ‘z’ is diameter of each strand.
Strands provide flexibility, prevent breakage and minimize skin effect.
The number of strands depends on the application, they may be 7, 19, 37, 61, 91 or more.
If the Al and St strands are separated by a filler such as paper then this kind of ACSR is used in EHV lines and called expanded ACSR.
Expanded ACSR has larger diameter and hence lower corona losses.
IACS (International Annealed Copper Stand)
It is 100% pure conductor and it is standard for reference.
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