The isolated phase bus (IPB) is a high energy system used to connect large electric generators to the power grid through the GSU transformer. A typical bus operates for decades with minimum care. How it works and how it is
built is not common knowledge .
Because of inherent high reliability, these high energy systems are often ignored until there is a failure. Repair costs and lost sales revenue can run into millions of dollars Collateral damage to a generator or GSU transformer can result in outage lasting up to a year.