Hi Experts.
In one of our projects , vendor has some limitations for installation the CT between disconnector and Circuit breaker for Bus Coupler and Bus section Panels as required (shown in Red) however vendor is proposing new CT panel to achieve the busbar differential protection requirements.
The system is double busbar type , 3 nos. bus couplers are between bus-1 & Bus-2 and 2- nos. Bus sections at Bus-2 , main bus is Bus-2 and Bus-1 is back up.
your expert feedback is required to validate that the proposed solution is meeting the Low impedance zone overlapping requirements and there is not risk of unwanted differential tripping.
file is attached.
Thanks
Anjum
In one of our projects , vendor has some limitations for installation the CT between disconnector and Circuit breaker for Bus Coupler and Bus section Panels as required (shown in Red) however vendor is proposing new CT panel to achieve the busbar differential protection requirements.
The system is double busbar type , 3 nos. bus couplers are between bus-1 & Bus-2 and 2- nos. Bus sections at Bus-2 , main bus is Bus-2 and Bus-1 is back up.
your expert feedback is required to validate that the proposed solution is meeting the Low impedance zone overlapping requirements and there is not risk of unwanted differential tripping.
file is attached.
Thanks
Anjum
