Answer Posted / shyam kishor
Merz-Price protection is the method used for protection of alternators. it is a most common system used for the protection of stator winding faults employs circulating current principle. in this scheme of protection,current at the two ends of the protected section are compared. under normal operating conditions,these currents are equal but may become unequal on the occurrence of a fault in the protection section. the difference of the currents under fault condition is arranged to pass through the operating coil of the relay. the relay then closes its contacts to isolate protected section from the system.(Ref. book on power system v.k mehta and rohit mehta)
| Is This Answer Correct ? | 65 Yes | 8 No |
Post New Answer View All Answers
in cvt,there are two windings,1a,1n and 2a,2n.in my one project i use only one winding i.e.1a,1n. the other winding is not in use, so i connect it in open delta and want to close it by ibsertibg thermal resistor. the output of cvt is 132kv/115/sqrt3. plesae tell me exact value of resistor, so i may close it to avoid the resonance phenomenin. send me answer on this email adress please. aetcon-po@aetcon.com
Why need 3phase machine double earthing?
Load transfer in 11kv double busbar switchgear - operation.
please write motor, transformer, Generator setting, fault level calculation of Tr.etc
how to find the voltage's of a transmission line plzz help with pictures i am not able to understand
How do you select the pickup value of the relay?
what is the advantages of having in-built acvvvf (without seperate inverter in the control panel)in the drive system of elevators?
When and where resistance earthing is used ? How to calculate the time constant for earth fault
what is the voltage regulation for unity and zero power factor?
area control error
What is the dc grounding system and what is diff between AC/DC grounding system?
how did the testing of protection relays done through current injection
hi frnds...pls send me aptransco previous papers .....pls..pls,,,(madhar.rocking@gmail.com)and suggest me some websites
what about SAP/MRP regarding manufacturing of electric motors and all drives?
What is the working principle of MIG welding? and its out put Voltage?
