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hi, I am doing a Timing tsts for 11 Kv breaker,Close time is 50ms,open time is 30ms and close to open time is 40ms,Actually what close-open time mentions which duration.The equipment is SCOPE Make.

Hi, 415/415 V Dyn11 100KVA Lightning transformer vector group results are not matching.Energizing this transformer will be a problem...

Hi Guys, In Numerical Relay defining star point what does it means 1.From object or towards object whether it influence protection operation. 2.why star point is also done towards protected equipment.

Hi Guys, Can any body give the details of fast bus transfer in the power plants(Unit Incomer &station Tie).my questions are 1.What should be the time duration of tie bkr closing when the unit incomer going to trip. 2.Undervoltage trip for the motor fedders in the Unit board

Hi Guys, Can anyone explain concept of High Impedance Diff protection.Diff between Low and High imp diff protection

Hi Guys, Unit Auxiliary T/F 13.8Kv/6.6Kv Dyn1 Vector group.In this LV Wdg brought Out with 2 neutrals,One neutral is directly grounded and another one is grounded via NGR,What may be the reason for providing 2 neutrals?

Hi Guys, Can any body give CT Polarity for a High impedance differential protection for HT Motors.CT polarity in the Line side of a motor and in the neutral side of a motor.