Previous in Forum: How to Size Axial Flux Alternators   Next in Forum: changing a dedicated 460 volt motor to a 230 volt motor
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
3 comments
Rate Comments: Nested
manir_b4u2002
Associate
India - Member - New Member Engineering Fields - Electrical Engineering - New Member

Join Date: Feb 2009
Posts: 38

Maximum Continous Overvoltage (MCOV)

05/08/2009 6:52 AM

I have follwing data for 220/33 kv substation:

system voltage-220 kv

LA rated-198kv

LA MCOV-165KV

so you see the rating of MCOV is less than its rated voltage,what does it mean?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Anonymous Poster
#1

Re: Maximum Continous Overvoltage (MCOV)

05/27/2009 3:28 PM

Someone Fthed up and under rated or ordered the wrong parts, get something thats rated for what your working with & see what the operating tolerances +/- are to factor in.
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#2

Re: Maximum Continous Overvoltage (MCOV)

06/10/2024 9:22 AM

It's difficult to say without knowing what the abbreviations mean:

LA - Definition by AcronymFinder

MCOV - Definition by AcronymFinder

Based on the above, there are 297 possibilities.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
raghun
Power-User

Join Date: Jan 2010
Location: Hyderabad
Posts: 343
Good Answers: 22
#3

Re: Maximum Continous Overvoltage (MCOV)

06/17/2024 5:53 AM

MCOV is calculated based on the maximum system voltage and adding a factor over it.

In this case 245kV is the maximum system voltage for 220kV system. Since LA is connected between Phase and Ground, the maximum voltage that appears is 245/1.732 = 141.5kV, with a safety factor of 10% required MCOV comes to 155.6kV. Thus, MCOV of 165kV translates in to 115% of max voltage that can appear across the LA and thus is more than adequate.

Only power systems which are ineffectively earthed need to have higher MCOV.

__________________
 Raghunath
Register to Reply
Register to Reply
Have a Different Question?
3 comments
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); PWSlack (1); raghun (1)

Previous in Forum: How to Size Axial Flux Alternators   Next in Forum: changing a dedicated 460 volt motor to a 230 volt motor

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 (78 right now)
Show Members
Advertisement