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