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| Can a transformer alone blow fuses ? |
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| Hextejas:
Thank you Zero for your excellent idea. Given my newbieness I have another idea and it is to buy another transformer closer to what was called out. The original spec called for a 15-0-15 however the designer also said that bigger would be ok. So i went bigger, apparently too much bigger. I didn't know enough to worry about in-rush current. Perhaps I will need to build this small limiter also but I think I will start with a smaller xformer. Thanks again. |
| Hextejas:
Ok, I added this thermistor to the input to the toroid transformer and it solved the fuse blowing issue of the transformer alone, however Ametherm SL32 2R025 (Pack of 2) Aqua-Rite Thermistor, ICL 2 OHM 20% 25A 30MM when I hooked it up to the power supply, it still blew the fuse, so something in the power supply is drawing a large current. I tried hooking the power supply to a 24V, AC wall wart and it blew it also. I will start a new topic re the power supply. |
| IanB:
--- Quote from: Hextejas on December 27, 2018, 03:29:29 am ---NiHaoMike, actually it's 120v mains. Is that gonna be a problem ? --- End quote --- It's inconvenient that the transformer is marked 115 V. In the USA the supply voltage is nominally 120 V, and depending on time and place might be up to 125 V. If the transformer is designed right up to the limit of saturation then using a higher than rated supply voltage will be pushing boundaries. |
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