Recent content by elecpl123

Hi Emarch find the report o0f CB attached.http://files.engineering.com/getfile.aspx?folder=de644243-0aac-46f9-8170-02bf8c6de390&file=CBrep.doc

Hi Emarch, Find the attachment of the report of the Circuit breaker.http://files.engineering.com/getfile.aspx?folder=e3832cb0-3401-4ba6-9171-ef4e540ece43&file=cbenq.doc

Hi Elmir, I cant able to understand can u explain in detil.

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 Slavag, Thanks for your response can u explain in detail so that it will help me

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, Thanks for all response, My Questions are, 1.actually in my closing ckt of tie bkr in logic they have included the Sync Check Conditions( of UAT I/C synchronism check between Station line PT and Unit Bus PT Should be OK,what may be the reasons for this 2.what should be the time...

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 Thanks to all, For your response when i contact manufacturer he has given reply ie two neutrals provided one is exposed to environment and another one is in the cable box.we have been using cable from neutral to NGR.Depending upon type of termination kits using we have to choose the...

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, i have the connection as per attacment and i also do the stability test and the result also found ok.i have done stability by applying 415 V supply to the motor for a short duration and stability is also found ok.the motor rated voltage is 6600V.Applying 415 v supply doing stability is...

Hi Slavag, With the above attached documentwhat is your opinion whether diff current flows in to the relay during healthy conditions of motor.

Hi ScottyUK, Here with i have attached the sketch diagram of my circuit can u give me the current flow during the healthy condition and also during the fault condition.relay used is spae010 http://files.engineering.com/getfile.aspx?folder=f0d8ad20-a81a-455c-bbe4-9f159c05e750&file=diff.pdf