Previous in Forum: Speed Sensors   Next in Forum: 13.8kV Crossing Cables
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
10 comments
Rate Comments: Nested
dg1961
Active Contributor

Join Date: Feb 2010
Posts: 16

Cable Calculation

04/30/2011 5:36 AM

what is the formula for voltage drop calculation for cables in 415V ac in india
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
3
TonyS
Guru
United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#1

Re: cable calculation

04/30/2011 7:03 AM

Same as they are in the rest of the world.

__________________
 The reports of my death are greatly exaggerated.
Register to Reply Good Answer (Score 3)
Go to Next Good Answer
Ried
Guru

Join Date: Dec 2005
Posts: 1602
Good Answers: 19
#5
In reply to #1

Re: cable calculation

05/01/2011 12:19 AM

Good answer!

__________________
 Eventually, one needs to realize that it is far less important to be the smartest person in the room than it is to sit next to that person and make friends.
Register to Reply Off Topic (Score 5)
CONWAYMECH
Power-User

Join Date: May 2006
Posts: 142
Good Answers: 3
#6
In reply to #1

Re: cable calculation

05/01/2011 9:01 AM

GA
Register to Reply Score 1 for Off Topic
kvsubramanyam
Guru

Join Date: Apr 2007
Location: Hyderabad, India
Posts: 596
Good Answers: 12
#9
In reply to #1

Re: cable calculation

05/03/2011 12:20 AM

> GA

__________________
 Subramanyam
Register to Reply
2
harry potter
Power-User

Join Date: Nov 2008
Location: India
Posts: 333
Good Answers: 6
#2

Re: Cable Calculation

04/30/2011 11:08 AM

dear,

IN 3 PHASE AC SYSTEMS,

VOLT DROP DV = 1.732 * I LINE * R * L KM WHERE R = Resistance of conductor

---------------- per KM.

PF L = Cable length in KM

PF= power factor except zero.

VOLT & CURRENT BEING VECTORs, PF PLAYS THE ROLE.

IN DC SUPPLY,

DV = 2 * I * R * L

__________________
 Exploring the Science of Electricity
Register to Reply Good Answer (Score 2)
No more Good Answers.
harry potter
Power-User

Join Date: Nov 2008
Location: India
Posts: 333
Good Answers: 6
#3
In reply to #2

Re: Cable Calculation

04/30/2011 11:28 AM

DEAR ALL,

IT SEEMS, POSITION OF PF & DIVIDER LINE IS SHIFTED, FORMULA BEING UN CLEAR,

AGAIN,

DV = (1.732 * I LINE * R * L) / PF

ALL PARAMETERS AS MENTIONED EARLIER.

NORMALLY, PF = 0.87 FOR MOTOR LOADS, 1.0 FOR HEATERS ETC...

__________________
 Exploring the Science of Electricity
Register to Reply
hithuanand
Power-User
India - Member - New Member Engineering Fields - Electrical Engineering - New Member

Join Date: Apr 2010
Location: Asia/India
Posts: 365
Good Answers: 1
#4

Re: Cable Calculation

04/30/2011 10:48 PM

To cross-check your calculations you can try this software
Register to Reply
msamad
Guru

Join Date: Feb 2009
Location: Houston, USA
Posts: 946
Good Answers: 244
#7

Re: Cable Calculation

05/01/2011 10:05 PM

See this thread:

http://cr4.globalspec.com/thread/51446/voltage-drop

- MS

__________________
 "All my technical advices in this forum must be consulted with and approved by a local registered professional engineer before implementation" - Mohammed Samad (Linkedin Profile: http://www.linkedin.com/in/msamad)
Register to Reply
electricalexpert65
Guru

Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#8

Re: Cable Calculation

05/02/2011 2:22 AM

Please refer to IS 1255 (Code of Practice for the Installtion of Power Cables up to 33kV). In this IS, there is a table listing the maximum permissible voltage drop for each size & type of cable, in Voilts per km per Ampere. Take this as a guidnace and claculate for the actual type, size, length & Ampere of the cable.
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
#10

Re: Cable Calculation

05/03/2011 7:10 AM

The Indian equivalent of British Standard 7671.

__________________
 "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
Register to Reply
Have a Different Question?
10 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

CONWAYMECH (1); electricalexpert65 (1); harry potter (2); hithuanand (1); kvsubramanyam (1); msamad (1); PWSlack (1); Ried (1); TonyS (1)

Previous in Forum: Speed Sensors   Next in Forum: 13.8kV Crossing Cables

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 (74 right now)
Show Members
Advertisement