Previous in Forum: Transformer Earth fault   Next in Forum: What is AC1,Ac2& AC3 Duty cycle?
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
4 comments
Rate Comments: Nested
jaswant
Participant

Join Date: Apr 2009
Posts: 4

Voltage Vector Surge Relay

04/06/2009 3:24 AM

We are running an 8 mw biomass based independent power plant. For generator protection we have installed MRG2 relay. Power is supplied to nearest grid at voltage level of 66 kv. The problem is that whenever there is tripping of any 11 kv feeder of the substation our vector surge relay is operated. I have set the angle of the relay to 7 deg but the surge is to the tune of 10-11 deg. Should i increase the setting to avoid frequent trippings or that will endanger the generator protection

jaswant
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
CraziestOzzy
Power-User
Australia - Member - Igor...pull the switch!!!

Join Date: Apr 2009
Location: Australia, sunny North Queensland
Posts: 380
Good Answers: 12
#1

Re: Voltage Vector Surge Relay

04/12/2009 8:09 PM

Homer Simpson would press a few buttons in a wild panic and then run from the control room...D'OH!!!

...seriously though, I have a guru friend who works on high voltage stuff who may answer your question if your request is fairdinkum.

__________________
 CraziestOzzy
Register to Reply
vatsanurag6
Member

Join Date: May 2009
Posts: 5
#2

Re: Voltage Vector Surge Relay

05/24/2009 12:34 AM

Dear Jaswant can you tell me how did you measured the angle of fault. If it is recorded in the fault record of the relay then you will have to increase the setting no option but canyou tell me what time delay is there with this setting because typically fault clearence time in grid with 11KV system is of the order of 100 to 150ms so can you mail me the settings 0f the relay.To avoid tripping you wil have to change the time curve or set the relay to have on delay of 200ms.

Anurag Vats

vatsanurag6@gmail.com
Register to Reply Off Topic (Score 5)
Anonymous Poster
#3

Re: Voltage Vector Surge Relay

04/20/2010 11:19 AM

Your relay may be instanteneous, think of delaying it's tripping, i.e introduce a timer to give chance to the breakers downstream
Register to Reply
Anonymous Poster
#4

Re: Voltage Vector Surge Relay

08/10/2010 9:44 PM

you dont change the VSR setting normally relay set is max 6 to 7 deg

u may change the setting u faced problem more, it operate safe to our equipment also us.
Register to Reply
Register to Reply
Have a Different Question?
4 comments
Copy to Clipboard

Users who posted comments:

Anonymous Poster (2); CraziestOzzy (1); vatsanurag6 (1)

Previous in Forum: Transformer Earth fault   Next in Forum: What is AC1,Ac2& AC3 Duty cycle?

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (64 right now)
Show Members
Advertisement