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Soft Start

Rangkaian ini biasa digunakan pada Televisi Sony 14 inch
Diagram pemasangannya lihat gambar berikut.:
Rangkaian Lainnya


The circuit will limit the current through the supply wires to 5.5A for about 1.5sec. After that time the relay will close and the current flow won't be restricted anymore. This is a very interesting circuit if you have a large toroid with big electrolytic caps connected to the power supply, since these will act like short circuits for a small amount of time if they start charging.

Rangkaian ini akan membatasi arus melalui kabel pasokan ke 5.5A selama sekitar 1.5sec. Setelah itu relay akan menutup dan arus tidak akan dibatasi lagi. Ini adalah sirkuit yang sangat menarik jika anda memiliki toroida/trafo besar dengan elco besar tersambung ke catu daya, yang bertindak seakan akan seperti sirkuit hubungan pendek untuk sesaat ketika mereka memulai pengisian daya.

 
  • R1, R2                                   470K 0.25W 1% mf
  • R3                                         220R 0.25W 1% mf
  • R4, R5, R6, R7                      10R 5W
  • C1                                         330n 250V (for direct mains connection)
  • C2, C3                                   470uF 40V electr.
  • B1                                         B250C1500
  • Re1                                       24V (250V-8A contact)
  • F1                                          Depends on the amp

sumber/source :
http://electronics-diy.com/electronic_schematic.php?id=451
http://mitglied.multimania.de/Promitheus/delay_circuit_for_toroids.htm

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