Why dc supply is used for closing and tripping coil of ht breakers. What happen if we use only ups ac supply only.
12 40897E.B sending end to receiving end 33kv ug cable laid 8Km,receiving end to ss1,ss2,ss3,ss4 all are Approx 800 Mtr,can go for 33KV to 430V or 33kv to 11kv in receiving end and 11kv to 430 near ss ,which one is good for technically and economically.
1 4215How to calcualte the total number of cells required for particular UPS of some X KVA with 3 and 5 hours back-up?
1 3530Post New JLL Electrical Engineering Interview Questions
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