In an existing building the utility is replacing transformers (for an addition which will have a new separate main disconnect). The new transformers have a much higher short circuit let through current. The original building service is a 50 year old ITE switchboard.
The let through current is over 80,000A.
The short circuit rating of the main circuit braker is 50,000A. (the transformers are about ten feet away from the switchboard indoors in a room next to the electric service room)
Any suggestions (other than replacing the entire switchboard)??? The main circuit breaker and switchboard are rated at 1600A.
