Tsohon Kudin Yadda Ake Dukkarwa a Tsakiyar 3 Gadi

Star Connection in Three-Phase Systems

A cikin zabe (Y) na iya haɗa, suna haɗa ƙungiyoyi (ko kuma samun) dukkan tare da uku a matsayin wurin da yake tsakiyar star ko neutral. Samanuwar samun suka fito daga baya mai sauƙa don haɗa zaben samun.

Don zabe ta uku masu fili uku, ana haɗa kawai samun samun su da yankin sauki. Kuma, a cikin zabe ta uku masu fili hudu, ana haɗa shiga shugabanar neutral daga wurin star, kamar yadda aka bayyana a dukar:

Star Connection Analysis with Phase and Line Quantities

Daga fassara dukar, suna haɗa ƙungiyoyin tare da uku (a2, b2, c2) don haɗa wurin star (neutral). Samanuwar samun (da ake sanya R, Y, B) suka fito daga baya mai sauƙa, kamar yadda aka bayyana.

• Phase current (Iₚₕ): Kirkiyar wuri a cikin zabe ta ƙasa.

• Line current (Iₗ): Kirkiyar wuri a cikin samanuwar samun.

• Phase voltage (Eₚₕ): Tashin kashi a cikin zabe ta ƙasa.

• Line voltage (Eₗ): Tashin kashi a kan biyu na samanuwar samun.

Phase Voltage vs. Line Voltage in Star Connection

Zabe ta ƙasa na star ya bayyana a cikin dukar:

Star Connection in Balanced Three-Phase Systems

A cikin zabe ta ƙasa mai muhimmanci, tare da uku (R, Y, B) suna haɗa kirkiyar sama. Saboda haka, tashin kashin E_NR, E_NY, da E_NB suna da muhimmanci sama amma suka fito da 120° electrical daga baya masu sauƙa.

Phasor Diagram of Star Connection

Dukarta phasor don zabe ta star ya bayyana a cikin dukar:

Gajimijinsu a cikin EMFs da kirkiya sun nuna yawan alama ba sai yadon da suke faruwa a lokacin da ba.

Tana,

Saboda haka, a cikin zabe ta star tashin kashi na samanuwar samun ya fi tsarki 3 zuwa tashin kashi na zabe ta ƙasa.

Saboda haka, a cikin zabe ta uku masu star, kirkiyar wuri na samanuwar samun ya kasance sama da kirkiyar wuri na zabe ta ƙasa.