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Thank you Scott. Good information Brij

My question is with regard to voltage transformers for 33 kV GIS switchgear Are plug-in type voltage transformers for GIS switchgear available from most major suppliers Are plug-in type voltage transformers with primary fuses for GIS switchgear available from most suppliers. Please give me...

Raghunath, Your response is a great help. It is now clear to me why we should limit the earth current to 10 A for unit transformer fed motors and not for other motors directly on the system. Thank you

High resistance earthing with 10 A limit is being proposed only for the motors which are supplied via its own unit transformers on the motor side. HV motor voltage rating could be 3.3, 6.6, or 11 kV. Thanks

I have a specification which insist high resistance earthing, limiting the earth fault current 10A to prevent core burning of the motor, for unit transformer fed high voltage motors. On the other hand we have high voltage motors directly supplied from high voltage system with resistance...

Che,Many thanks for your response it is quite clear. Thanks

My question is with regard to IP rating. I want to specify IP 31. Is there any benefit in specifying IP 41. What would the cost difference between the two for a typical switchboard and other pros and cons. Other details are as below. The LV switchgear will be installed indoors in an...

Marmite, Many thanks for your excellent and comprehensive response. Let me grasp this fully, I may have follow on questions later. Regards Brij

My question is regarding the maintainability and repair of oil filled cables. if a single core cable's outer sheath is damaged and oil leaks due to external excavation what minimum repairs will be needed. 1. Can the external sheath be repaired insitu. 2. Can a small piece of cable be cut and...