Previous in Forum: CT Class Difference   Next in Forum: Tesla Coil Project
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
8 comments
Rate Comments: Nested
jhunair
Associate

Join Date: Feb 2011
Posts: 40

RMU

02/18/2011 3:24 PM

In RMU, what is the purpose of earthing switch?

regards
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: RMU

02/18/2011 3:27 PM

To connect it to the electrical earth.
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: RMU

02/18/2011 4:01 PM
AcronymDefinition
RMURobert Morris University

(Moon Township, Pennsylvania)

RMURing Main Unit
RMURemoval Unit

(Kyoto Protocol)

RMURemote Management Unit

(Oscilloquartz)

RMURadio Management Unit
RMURemote Monitoring Unit
RMURecords Management Unit
RMURack Mount Unit
RMUReproductive Medicine Unit
RMURajabhat Mahasarakham University

(Thailand)

RMURolla Municipal Utilities

(Rolla, MO)

RMURetail Merchandise Unit

(mall cart)

RMURemote Multiplexing Unit
RMUResource Management Update
RMURemote Maneuvering Unit
RMURemovable Memory Unit
RMURAID Management Utility
RMURevenue Management Unit
RMURemote Magnetic Unit

(solid state flux valve)

RMURefresh Memory Unit
RMURenovation, Modernisation and Updating
RMURetrofit, Modification, or Upgrade

(aeorspace)

RMURunway Monitoring Unit

submit new definition

Who knows?

__________________
 "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 Score 1 for Off Topic
cuba_pete
Guru

Join Date: Dec 2010
Posts: 1895
Good Answers: 44
#4
In reply to #2

Re: RMU

02/18/2011 7:50 PM

Ring Main Unit. Just guessing...considering the forum.
Register to Reply Score 1 for Off Topic
TonyS
Guru
United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#3

Re: RMU

02/18/2011 4:02 PM

Each of the incoming cables can be switched to earth for safety when work is being done on interconnecting cables.

__________________
 The reports of my death are greatly exaggerated.
Register to Reply
mrswamy
Guru

Join Date: Jun 2008
Location: Oman
Posts: 612
Good Answers: 14
#5

Re: RMU

02/18/2011 11:07 PM

RMU means Ring Main Unit. Provision of earthling switch is for safety purpose.
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
#7
In reply to #5

Re: RMU

02/19/2011 2:57 PM

Under British Standard 7671, the Ring Main Unit is always earthed. So why the switch?

__________________
 "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
TonyS
Guru
United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#8
In reply to #7

Re: RMU

02/20/2011 5:44 PM

The earth switch is internal. It's so the incoming and outgoing cable cores can be earthed. I trained as a cable jointer, no way would I work on a cable unless both ends were earthed.

BS 7671 doesn't cover 11KV

__________________
 The reports of my death are greatly exaggerated.
Register to Reply
Haajee
Guru

Join Date: Feb 2006
Posts: 1758
Good Answers: 6
#6

Re: RMU

02/19/2011 1:00 AM

Safety from whom?

As far as I know the connection of earth is always ensured to be intact for safety.
Register to Reply Off Topic (Score 5)
Register to Reply
Have a Different Question?
8 comments
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); cuba_pete (1); Haajee (1); mrswamy (1); PWSlack (2); TonyS (2)

Previous in Forum: CT Class Difference   Next in Forum: Tesla Coil Project

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 (121 right now)
Show Members
Advertisement