This question is for the same project I asked in my other post about HRG with multiple soures but question is of a different topic.
Customer wants to combine (4) individual sections of single ended MLO switchgear into a M-T-M-T-M-T-M arrangement by adding (4) tie breakers between each of the buses. These switchgear sections are currenly MLO and each from via a separate transformer from an upstream MV feeder breaker on a single ended switchgear lineup.
The idea would be to add main breakers to each lineup and interlock the tie breakers such that no more than two ties would be permitted to be closed at the same time.
Has anyone ever seen anything like this before. This seems like it provides a great bit of secondary selective reliability but is there a better way to accomplish the same reliability?
Customer wants to combine (4) individual sections of single ended MLO switchgear into a M-T-M-T-M-T-M arrangement by adding (4) tie breakers between each of the buses. These switchgear sections are currenly MLO and each from via a separate transformer from an upstream MV feeder breaker on a single ended switchgear lineup.
The idea would be to add main breakers to each lineup and interlock the tie breakers such that no more than two ties would be permitted to be closed at the same time.
Has anyone ever seen anything like this before. This seems like it provides a great bit of secondary selective reliability but is there a better way to accomplish the same reliability?
