Welcome to electrical and electronics engineering discussion website, Please login or register to continue.

5 views
by
Draw a neat labeled diagram to show protective system for AC traction and give the function of each relay used in it. 

Your answer

Thanks for your contribution. Feel free to answer this question. Please avoid short answer. Your answer is most welcome. Be genuine.

Upload image or document:

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
Are you a robot ? (Y = Yes / N = No)
To avoid this verification in future, please log in or register.

1 Answer

0 votes
by

Protective system for AC traction: 

image

Function Of Each Relay: For transformer

• Inverse time over current relay– as back up protection on primary (HV side) over current protection of transformer and other equipment. 

• Overload thermal relay – protection against sustained overloads on t/f 

• Earth fault relay – earth fault protection of transformer 

• Buchholz relay – Protection from incipient earth or inter winding faults inside the transformer 


For catenary

• MHO relay – wrong coupling protection 

• MHO relay – over current protection at farthest point. 

• over current relay - over current protection against faults near substation 

• Under voltage relay – protection against faults far away from substation

Welcome to Q&A site for electrical and electronics engineering discussion for diploma, B.E./B.Tech, M.E./M.Tech, & PhD study.
If you have a new question please ask in English.
If you want to help this community answer these questions.

...