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Posted: 2022-01-02 05:44 PM
Pagi, untuk Rating Trafo 31.76 MVA dan tegangan 11 kV, arus full load nya 1,667 A. Sedangkan rated current untuk VCB 11 kV bisa di 2000 A. Kalau saya pakai breaker 132 kV yang terhubung dengan trafo 11/132 kV, rated currentnya berapa ya? Terima kasih
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Posted: 2022-01-10 07:31 PM
Biasanya untuk breaker 145 kV mempunyai rated current 1200A sampai 4000A.
Berdasarkan turns ratio, untuk 1667 A pada 11 kV akan sama dengan 139 A pada 132 kV:
I(1) x V(1) = I(2) x V(2)
1667 A x 11 kV = I(2) x 132 kV
I(2) = 139 A
Sehingga bisa gunakan rated current 1200A sebagai rated current terkecil dari breaker ukuran 132 kV.
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