Electrician Talk - Professional Electrical Contractors Forum
CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!
Go Back   Electrician Talk - Professional Electrical Contractors Forum > Electrical Trade Topics > UK Electrical Forum
Variable frequency inverter connections UK: Variable frequency inverter connections
Register Electrical Photos FAQ Members List Social Groups Contractor Talk Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 05-16-2008, 03:45 PM   #1
Junior Member
 
Join Date: May 2008
Location: England
Posts: 1
Default Variable frequency inverter connections
I am looking to replace a 7.5KW (10HP) AC 3 phase motor and Variable Frequency drive. I have selected a Eurotherm 650 3 phase 7.5KW and a SEM 7.5KW motor as they were on stock locally, I was wondering how should the motor be connected, should it be wired star or delta. Any advice much appreciated.

Charlie.
charlietech is offline   Reply With Quote
Join Contractor Talk

Join the #1 Electrician Forum Today - It's Totally Free!

ElectricianTalk.com - Are you a Professional Electrical Contractor? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's the leading place for electricians to meet online. No homeowners asking DIY questions. Just fellow tradesmen who enjoy talking about their business, their trade, and anything else that comes up. No matter what your specialty is you'll find that ElectricianTalk.com is a great community to join. Best of all it's totally free!

Join ElectricianTalk.com - Click Here JOIN FOR FREE

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ElectrcianTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!
Old 05-16-2008, 04:07 PM   #2
Don't like know it alls
 
Join Date: Jul 2007
Location: UK
Posts: 375
Default
Check the motor rating plate bud,it will tell you the connection you need.some people seem to think they all need conneting Delta but this is not so.

I always use SY to connect motors to VFD's , make sure you bond the braid to earth if you use it and check the VFD's manual for max distance of cabling to motor.

Chris
chrisb271 is offline   Reply With Quote
Old 05-16-2008, 05:10 PM   #3
Don't like know it alls
 
Join Date: Jul 2007
Location: UK
Posts: 375
Default
heres a bank of 30 vfd's i've just put into service at a local recycling plant


Attachment 459
Last edited by chrisb271; 01-20-2010 at 12:16 PM.
chrisb271 is offline   Reply With Quote
Old 06-09-2009, 05:57 PM   #4
Junior Member
 
Join Date: Jun 2009
Location: UK
Posts: 1
Default
Quote:
Originally Posted by chrisb271 View Post
Check the motor rating plate bud,it will tell you the connection you need.some people seem to think they all need conneting Delta but this is not so.

I always use SY to connect motors to VFD's , make sure you bond the braid to earth if you use it and check the VFD's manual for max distance of cabling to motor.

Chris
I Have come up against the same problem. The motor rating plate gives values for Star and Delta but does not tell you which connection to use with the Inverter, neither does the Drive Manual.
Big Harry is offline   Reply With Quote
Old 06-09-2009, 06:37 PM   #5
Registered Member
 
Join Date: Feb 2008
Location: orlando florida
Posts: 947
Default
Quote:
Originally Posted by charlietech View Post
I am looking to replace a 7.5KW (10HP) AC 3 phase motor and Variable Frequency drive. I have selected a Eurotherm 650 3 phase 7.5KW and a SEM 7.5KW motor as they were on stock locally, I was wondering how should the motor be connected, should it be wired star or delta. Any advice much appreciated.

Charlie.

Well wire it up delta heres why STAR /DELTA star is reduced voltage start and delta is full voltage applied to motor meaning wire up your motor for a delta full running tap .

Thats why they made freq drives to not have a need to star start /delta run it kinda ramps up the motor speed for you .

Dont know what or how your drive is made or any info about it ?
What is your type of drive ? Take care
Last edited by nick; 06-09-2009 at 07:12 PM.
nick is offline   Reply With Quote
Old 11-02-2009, 02:07 AM   #6
Junior Member
 
Join Date: Jul 2009
Location: China
Posts: 6
Default
I think it's better to ask your supplier for this technical information.
acdrive is offline   Reply With Quote
Reply

« Previous Thread | Next Thread »
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
cleaning buss connections sparky970 General Electrical Discussion 8 09-03-2008 07:21 AM
Inverter Baud Rate? Mackie General Electrical Discussion 15 08-30-2008 11:45 AM
DC - AC Inverter / Bypass Concern ohmontherange General Electrical Discussion 2 06-07-2008 10:32 PM
12V Lighting Connections megavolt Lighting Design 11 04-18-2008 06:42 PM
You Just Gotta Tighten Those Connections! brian john Workplace Safety 8 03-20-2007 05:02 PM

Top of Page | View New Posts

All times are GMT -4. The time now is 10:11 AM.

Contact Us - Electrical Forum - Top

Electrician Talk © 2006 - 2009 The Building Network LLC

Search Engine Optimization by vBSEO 3.2.0