Previous in Forum: High Voltage Cable Laying   Next in Forum: Starter Question
Close
Close
Close
10 comments
Active Contributor

Join Date: Sep 2010
Location: India
Posts: 11

Cable Size for Drive

10/04/2014 8:17 AM

I have 55kw,3 phas ,415V,50hz motor with VFD.what could be size of cable for motor to starter.

Register to Reply
Pathfinder Tags: drive
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Guru
Engineering Fields - Electrical Engineering - Been there, done that. Engineering Fields - Control Engineering - New Member

Join Date: Dec 2008
Location: Long Island NY
Posts: 15283
Good Answers: 940
#1

Re: cable size for drive

10/04/2014 9:45 AM

The cable could be a lot of different sizes depending on the environment of the motor, driver and cable run. It should also matter how critical it is for this motor to run. The electrical codes for the location of this motor will be a good guide but depending on the missing criteria they may not be sufficient. There will also be the question of conductor size that will fit the VFD and motor connections.

You must properly do your own homework before you will understand the reasoning behind any answer you find.

__________________
"Don't disturb my circles." translation of Archimedes last words
Register to Reply
Power-User

Join Date: Mar 2010
Location: Islamic Republic of Pakistan
Posts: 115
Good Answers: 14
#2

Re: cable size for drive

10/04/2014 10:27 AM

Provide the following data :-

a.Total load,

b.Duty factor

c.Distance between source and load

d.Cable laying details

e.No of cables in trench

Register to Reply
Guru

Join Date: Jul 2007
Location: Commissariat de Police, Nouvions, occupied France, 1942.
Posts: 2599
Good Answers: 76
#3

Re: cable size for drive

10/04/2014 12:16 PM

Measure it! If it isn't there yet then it will be whatever the qualified electrician who installs it for you selects; ask him/her!

__________________
Good moaning!
Register to Reply
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 31835
Good Answers: 1750
#4

Re: cable size for drive

10/04/2014 2:17 PM

Should be around 100 FLA for motor....multiply it by 1.25% which gives you the MCA (minimum circuit ampacity)...

http://www.gridcables.com/pdfs/3-core-al-armd.pdf

__________________
All living things seek to control their own destiny....this is the purpose of life
Register to Reply
Guru
United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 180
#5

Re: cable size for drive

10/04/2014 7:55 PM

You don't seem to have any idea on cable sizing (look at his previous posts).

Why should a group of random guys do the job you're paid for?

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

Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#6

Re: cable size for drive

10/05/2014 12:08 AM

Ask VFD/motor manufacturer what type of cable is suitable for this.Is the motor suitable for inverter duty?.

__________________
pnaban
Register to Reply
Guru

Join Date: Jul 2007
Location: Commissariat de Police, Nouvions, occupied France, 1942.
Posts: 2599
Good Answers: 76
#7

Re: Cable Size for Drive

10/06/2014 8:37 AM

It depends on whether it is copper, aluminium or something else, all of which you seem to be keeping to yourself, together with any indication that you know what the applicable electrical installation code is for your location. That is why the post is being treated contemptibly.

__________________
Good moaning!
Register to Reply
Guru

Join Date: Oct 2012
Location: 100 miles North from the World Center
Posts: 856
Good Answers: 42
#8

Re: Cable Size for Drive

10/07/2014 11:56 PM
__________________
Julius
Register to Reply
Guru

Join Date: Oct 2012
Location: 100 miles North from the World Center
Posts: 856
Good Answers: 42
#9

Re: Cable Size for Drive

10/10/2014 10:15 AM

As information only see:

http://www.beldenapac.com/sites/default/files/resource/PBAI_121_VFD_Cable.pdf

and also [may be] :

http://www.gozuk.com/blog/cable-length-between-vfd-and-motor-865061.html

__________________
Julius
Register to Reply
Anonymous Poster #1
#10

Re: Cable Size for Drive

10/19/2014 9:12 AM

To understand more about cable selection, please check out this http://www.psa-outline.com/cable-selection/

Register to Reply
Register to Reply 10 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Copy to Clipboard

Users who posted comments:

7anoter4 (2); Aghvel Niazi (1); Anonymous Poster (1); Crabtree (2); pnaban (1); redfred (1); SolarEagle (1); TonyS (1)

Previous in Forum: High Voltage Cable Laying   Next in Forum: Starter Question

Advertisement