{"id":7852,"date":"2025-07-29T07:36:52","date_gmt":"2025-07-29T07:36:52","guid":{"rendered":"https:\/\/grwinding.com\/?p=7852"},"modified":"2025-09-25T07:48:49","modified_gmt":"2025-09-25T07:48:49","slug":"corrente-di-spunto-nei-trasformatori-toroidali","status":"publish","type":"post","link":"https:\/\/grwinding.com\/it\/inrush-current-in-toroidal-transformers\/","title":{"rendered":"Guida alla corrente di spunto nei trasformatori toroidali"},"content":{"rendered":"\t\t
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When you first turn on a toroidal transformer, it can draw a very large amount of current\u2014much more than it normally uses. This is called inrush current<\/strong>. It only lasts for a split second but can be 30 to 60 times higher<\/strong> than the transformer\u2019s normal current.<\/p>

\"Graph

Toroidal transformers<\/a> have a round, closed core with no air gap<\/strong>, which makes them efficient and quiet. But this also means they can saturate quickly<\/strong> when power is first applied. That sudden magnetic overload causes a big current spike.<\/p>

If this inrush isn\u2019t managed, it can trip a breaker<\/strong>, blow a fuse<\/strong>, or even damage nearby parts. That\u2019s why it\u2019s important to understand inrush current and plan for it when using toroidal transformers.<\/p>

Why Toroidal Types Have Especially High Inrush<\/h2>

\"Toroidal

Toroidal transformers are known for being efficient and compact, but they also tend to have much higher inrush current than other transformer types. Here\u2019s why:<\/p>