First let me say hello to all.

Know I have an issue with a 480 step down transformer. 115 230 115 secondary. I have 480 across the primary and 277 on each leg to ground on the scondary I have 110 and 110 the problem is the 230. Across the legs I have 230 to ground I have 200 on one leg and 60 on the another. The 230 is powering 3heaters in parallel. Can someone help me with the why and theory behind the cause?

Thank You
Shaun