When both contractor star & delta is hold in star delta motor ?? So what happen in this case ??
1 1791if flux and load static in dc motor and supply voltage increases 20% then what happened in speed
1500Shall we use Dyn1 transformer in place of Dyn11 for motor application as a distribution transformer
1 2315From reading, Under voltage relay used also as phase sequence relay now, Why I use under voltage and phase sequence relay in the same circuit (ATS)?
1352What is the permissible limit of shaft voltage for 6.6 KV motors ? Why? Is there any standard is available?
2179In what situations relays are used in Circuit breaker? In Above what rating of Circuit breaker the relays are used? Why relays are not used for CB like MCB?
1297How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?
1379Now I inject 1kv DC supply r&y=??? R&Y=?? Y&B=?? B&R=???? RYB&N=??? RYBN&E=????? Minimum value====???????
1 2371What will happen if the rotor circuit of a slipring I.M. is kept open & electric supply is given to its stator winding.
2 6385Post New Electrical Engineering Questions
How we select the vector group of 3phase power transformer?
If i have two 3000 kW motors and the whole facility requires a 10 MVA transformer. What would be better installing two 5 MVA transformers(one for 1 motor ) or just a single 10 MVA transformer for both of them. Give reasons for your answer.
how 650 volts creates? where is use?
if field breaker of generator is closed prior to its rated speed on a power generating unit. what will be the effect on generator, unit transformer and starting transformer.
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
I have a situation to design sub-Distribution board/Panel meant for feeding power sockets. In the incomer CAN i Take TP MCCB with Neutral Link and All the outgoing feeders with to sockets with TP MCCB and Neutral Link? P.S : My System is IT Earthing
sir please send me previous year questions of jspl of electrical section through which i could prepare myself fpr the test.
How to test lightning Arrester?
if sf6 gas low in gis what will happen
A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?
What are the advantages and disadvantages of negative feed back?
During FEED, you will have all the information with regards to cable. How will you calculate the MTO for MV and LV Cables? what are your considerations?
IF HT CAPACITOR IN ON POSITION IS THERE ANY LOSSES I.S I SQURE OCCURS IN THE SYSTEM
for a 400kv t/m line with 10 ampere current will corona occur?
How to size fuse? How to size MCB?
