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We in my plant one of the transformer showing neutral to earth voltage is 22V how to solve it
3 5716why in some cases the receiving end voltage is higher than the sending end voltage in transmission line (called 'Ferranti effect') ????? whts the reason behind tht???
3 7643Hi If connecting a temp generator 670KVA .415kv with step up Tx .415/11kv. I am given Generator impedances Z1 Z2 Z0 to 100MVA base. Do I need to work out the generator fault current by using these impedances i.e gen rating / impedance. Then use this as my source impedance for the calculations that follow.
20401)Why potential transformer primary site grounded? 2)can be loop between neutral & body for grounding? 3)What is the difference between ELCB &RCCB? 4)Why we use iron core in transformer insted of wooden core? 5)what is the principle of excitation? 6)Why we test the core balance test for transformer? 7)what is creepage?What is the creepage length for insulators at different voltages? 8)How much type of relays used for differential protection of generator,transformer & busbar protection?
5 13206Which is is best option for 33 kv line incomer.I am Desinging the panel for new projects and i would like to get Your opinion on this Vcb or sf6. Please help me with your replies. Thanks D p singh
6 7970Post New Electrical Engineering Questions
I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.
What difference between ref protection and differential protection ?
Please clarify, 1. Is it required to lay two runs of GI wire along with Armoured LT cable if it is laid between one big mains (63Amps TPN SDF) to small main (32A TPN SDF) with proper glanding termination? 2. If the armoured cable with proper glanding is laid from DB to CNC machine, is it required to run two runs of body earthing to the Machine from DB? 3.If the armoured cable with proper glanding is laid from Substation to Hangar, distance is approx. 100 mtrs, is it required to do earthing at shop area though the primary termination at substation is earthed through gland.
what is the safty of poly phase tranformer?
What will be the current if the resistance total in a series circuit doubles?
Why we are using only Dyn11 tranformer in distribution system but not using a Dyn1 in distributing system?why not and advantage and disadvantage in both
how can we understand that where we have to use ac or dc coil for solenoid valve and why?what is the different between coil of ac and dc explain please.
what is meant by CT`s saturation ? Can we use Metering CT`s with Protetection CT`s ?
hi i have applied for lic of india south cenrtal zonal ,hyd. i didnt get hall ticket till now.let me know how can i get form internet
What is the mechanism of WTI
oil cooled transformer
What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.
Explain how you intend to work under pressure to meet up with deadline target?
why we need to us lenz's law for synchornous motor
how to calculate
