All Forums  Main Area  Kinks for Antennas  Wot size fuse do I use?

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by vk3pa[/i] [br]A fuse in series with the mains input to the Transformer.the value can be calculated as follows.... [black][i][b](power in the secondary of the transformer = power in the primary of the transformer)[/b][/i][/black] Therefore for 13.8v at 20 Amps the secondary power = 13.8V * 20Amp = 276 watts Calculating from that for a mains supply of 240 volts = 276/240 = 1.15 amp fuse. I use a 2 Amp fuse in my supply this gives some provision for the large capacitor charging current ( inrush current )during switch on [/quote]   Check here to include your profile signature.