What happens in a transformer when a secondary load exceeds power output?February 6, 2018 by ShivamDWQA Questions › Category: Transformer › What happens in a transformer when a secondary load exceeds power output? 0 Vote Up Vote Down Shivam asked 5 years ago 1 Answers 0 Vote Up Vote Down admin Staff answered 5 years ago Following thing may happens in a transformer when a secondary load exceeds power output : There may be voltage drops due to the impedance mismatch Core saturates is also occur Unless there’s a thermal/overload protection, your transformer becomes a BBQ.