04/09/2026
What does BIL really mean when choosing a transformer? ⚡️🛡️
Beyond normal operating voltages, electrical systems constantly face lightning impulses and sudden switching surges. Basic Impulse Insulation Level (BIL) is the critical benchmark that ensures your transformer insulation can take the hit safely.
We put together an approachable, easy-to-read guide breaking down the standards and testing methods.
Check it out on our blog: https://ltecpower.com/bil-definition-in-transformers/