ANALISIS KEDIP TEGANGAN AKIBAT PENGASUTAN MOTOR INDUKSI 3 FASA 250 KW PADA RUMAH POMPA SWK KARAH KOTA SURABAYA

Pratama, Bima Gilang (2025) ANALISIS KEDIP TEGANGAN AKIBAT PENGASUTAN MOTOR INDUKSI 3 FASA 250 KW PADA RUMAH POMPA SWK KARAH KOTA SURABAYA. Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

Penelitian ini bertujuan untuk mengetahui faktor utama yang dapat menyebabkan terjadinya kedip tegangan pada saat proses starting motor induksi 3 fasa dengan kapsitas 250 KW pada Rumah Pompa SWK Karah Kota Surabaya. penggunaan motor induksi 3 fasa berdaya besar di rumah pompa merupakan komponen penting dalam mendukung upaya pengendalian banjir di Kota Surabaya. Namun proses pengasutan motor tersebut khususnya dengan metode Direct On Line (DOL) dan Star-Delta dapat menghasilkan arus start yang tinggi dan berpotensi memicu terjadinya kedip tegangan . Penelitian ini bertujuan untuk mengkaji besarnya arus start, menghitung impedansi total pada sistem distribusi, serta mengevaluasi tingkat kedip tegangan yang timbul selama proses pengasutan motor induksi 250 kW di Rumah Pompa SWK Karah. Metode yang diterapkan meliputi pengukuran langsung impedansi kabel dan transformator, serta analisis arus start dan tegangan dengan mengacu pada standar IEC 61000-4-15. Berdasarkan hasil perhitungan metode DOL menghasilkan arus start sebesar 1.710,61 A atau sekitar 2,88 kali arus nominal yang menyebabkan penurunan tegangan RMS secara signifikan. Sementara itu metode Star-Delta memberikan dampak kedip tegangan yang lebih kecil namun tetap memerlukan perhatian khusus terhadap durasi perpindahan mode pengasutan. Berdasarkan hasil analisis dapat disimpulkan bahwa pengasutan motor induksi berdaya besar secara langsung tanpa pengendalian arus start yang memadai dapat menurunkan kualitas daya dan mengganggu stabilitas sistem distribusi listrik di rumah pompa.

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