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  • Users: SK07
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  1. SK07

    Cost saving in Electrical - Engineering, Procurement & Construction Works

    Can we have different ideas for cost optimization in Electrical - Engineering, Procurement & Construction (EPC) Works. Electrical works includes Indoor Substation, Power distribution in process and non-process facilities, electrification of roads, buildings, facilities etc. The purpose is to...
  2. SK07

    REF CT Class

    For restricted earth fault protection relay for transformer, what Class of current transformers are used. Is it 5 P 10 or class X and why? In the existing system I find Current Transformer Class 5P10 used for REF for Transformer. Thanks in advance.
  3. SK07

    11KV Busbar Sizing

    Arrangement of an Existing 11KV Switchgear receiving power from 132KV substation through cables is as follows; Upstream 132KV Substation - 4 Nos. of 132/11 KV 30 MVA Transformers feeding power to 11KV Switchgear at downstream. The configuration is 3 + 1 hot standby, which means all 4...
  4. SK07

    Electrical Design Calculations - based on IEC / IEEE Standards

    Looking for some reliable website which provides ''Electrical Design Calculations - based on IEC / IEEE Standards'' in excel format preferably for: Earthing calculations, cable sizing calculations, Lighting calculations, Transformer sizing, etc. Kindly help by providing web link.
  5. SK07

    Resistance Earthing OR Solid Earthing for 3.3kV Diesel Generators

    In our Project we have On-site Power Generation with no "State Grid" Connection. On-site Power Generation is by 2 nos. of 3.3kV, 2000kVA, 50Hz Diesel Generators operating in parallel and 3rd Diesel Generator of identical rating connected but on standby mode. Earthing system adopted is Solid...
  6. SK07

    3.3kV Generator Grounding

    In our Project we have On-site Power Generation with no "State Grid" Connection. Power source is 2 nos. of 3.3kV Diesel Generators operating in parallel and 3rd 3.3kV Generator is connected but on standby mode. My questuion is how Grounding is to be done for 3.3kV Generators oerating in...
  7. SK07

    Lightning Protection Interconnection with Equipment Earthing Grid

    I have seen Lightning Protection Earthing grid (electrodes with interconnected conductor system) seperate from Equipment earthing grid without any interconnection. I would like to know Recommended practice as relevant per IEC standard. Are we supposed to interconnect Lighting protection grid...
  8. SK07

    Control Cables for Upstream Substation Signals & Tripping

    I have been regularly using multiple core 2.5 sq.mm XLPE/LC/PVC/SWA/PVC Control cable for signals & tripping between Upstream and downstream Substation with distance upto 5-6 Kms. The signals are as, 1. Solkar Pilot Wire for Differential Protection Relay - ANSI NO. 87 2. Inter Trip Send - ANSI...
  9. SK07

    Diesel Generator Sizing Calculation

    I am in the process of sizing Diesel Generator Set. Expected rating is close to 4000 kVA. It is to be used for Continuous Duty (24 hours a day and through out year) at a remote location since Main power from utility Company is not available. I would appreciate if any one has a sample detailed...
  10. SK07

    Fault Current Limiters

    Any technical information / details available preferably in the form of power point presentation providing overview of Fault current limiters would be highly appreciated.
  11. SK07

    Lightning Strike Counter

    My understanding is that Lightning strike counter can be installed on any one of the down conductor. Additional Lightning strike counter on another down conductor can be installed for reliability purpose only. Please let me know if my understanding is correct and do International Standards...
  12. SK07

    Published Papers

    I am looking for weblink of Publications / Published Papers (similar to IEEE publications) / Journals / Magazines viz. on Electrical Power System Study, Substations, Switchgear, Relay Protection, etc. The intent is to find and read published Papers / Lessons learned from Projects. Please note...

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