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Dear all, I would like to seek reason why the following test must be conducted with acceptance criteria, i) partial discharge, ii) high voltage at 66.5kV (AC) for 5 min, iii) Sheath HV (DC) test, 25kV (1min), iV) Hot set test, From i understand, i) to ensure minimum current losses, ii)...

Dear all, Normally, as switchyard/ primary designer, how do you guys select the number of spacers for connecting the gantry and also for between equipments. My second question, what's the static tension force for conductor for connecting in between the conductors. Do share any IEC standards...

Anyone here know how to review capacitor bank drawing ? Any useful knowledge willing to share ? Regards Linspire

Hi guys, I would like to have everyone input for the following items; 1) What is the Form 4 Type 2 ? 2) In general practice, how should design consider in terms of putting the "KWH meter", "Ammeter", "Voltmeter" , "Earth Fault Relay" , "Over-current Relay", "Heater" ? 3) Is it a must to put...

Anyone mind to to share what's the function for under voltage relay to be installed in LVAC system ?

Dear all, I would like to seek opinion how you guys review the submission approval for transformer accessories transformer - OLTC. As far as I know, substation here, they prefered MR Germany - OLTC.

Guys, I would like to seek clarification what is current wave (30/60 us - slow-front/switching), (8/20 us- fast-front/lightning), 1/(2-20 - steep-front)us

Hi guys, Has anyone here happen to know the manufacturer - Valganon Metal Cable (Spain) ? I would like to know the quality and customer service ? Do some feedback or testimonial on this manufacturer.

Hi guys, I would like to seek clarification sentences on IEC 60076-5 2000 clause 3.2.7 Tap-changing equipment. Where fitted, tap changing equipment shall be capable of carrying the same overcurrents due to short-circuits as the windings. However, the on-load tap-changer is not required to be...

Hi guys, Is there anyone experience conducting the design verification review meeting with the well-known manufacturer for such equipments : transformers or any equivalent switchgear equipments or reactor. What you guys usually include the questionare or justify design from the utilities.

Hi guys, I would like to ask does a Power Transformer specications with lower rated power eg. 80 MVA applicable for a higher rated power eg 120 MVA but both are same rated voltage eg. 132/36 kV.

Hi guys, I would like welcome all primary or secondary engineer to output own opinions in term of career and experiences. As far as I'm concern, I only exposed few primary drawings switchyard layout, lightning protection, control building, short circuit for gantry calculation. And yet not...

Hi guys, I would like to know what is dry-out degree of polymerisation test for transformer design ? What is the requirements ?

Dear all, Anyone here can do the calculation based on IEC 865 Part 1 1993 ? I would like to request technical details for i. 45M Span Line Entry - Quad Drake ACSR; ii.45M Span Jack Bus - Twin 1267 Sq.mm AAC;

Dear all, I would like to seek opinion on Manufacturer quality equipment design based for the following company. Busbar - i. Lorunser Austria ii. Hydro Aluminium DC charger - Gutor, France

Hi, Do you guys have picture for oil interceptor for Tx, ETx, NER, NCTx ? Because I'm curious how does RC sump actually help prevent for oil leaking ? Mayb perhaps inside the RC sumpm, there is a drain which leads the leaking oil to the oil interceptor.

Hi, I would like to know what's the function for interbay screen installed in the gantry structure beam there ? Does it serve purpse for supporting the cable or connection cable purpose ?

Hi, I would like to ask do you guys accept the type test report to represent a equipment with same concept design but with minor changes such as rated operating frequency, different Type Test according the standard ( such as normally practice are IECs, but they provided IEEE standard ).

Dear all, I would like to request reading material on regards Surge Arrester. I have came across the different class for SA such as distribution class for teaser reactor and station class IV. So, would like to learn more. Thank you. Regards, Goh Kian Hui

Hi, I would like to know how do you guys set the safety clearance for the following type; i. Minimum horizontal safety clearance from the nearest conductor ii. Insulation Requirement - Rated short duration power frequency withstand voltage a. phase - Earth and between phase; b...