HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 2/2
Larry M
User Rank
Platinum
Re: Relay vs. Contactor
Larry M   4/25/2012 11:10:43 AM
NO RATINGS
GlennA wrote "There is a difference."

Not really. That's like saying that all lamps over 300 watts are to be called lamps and those less than 300 watts are to be called light bulbs. A difference between control voltage and switching voltage isn't really a discriminator either.

Is the "condenser" in the ignition of your pre-1980s car not a capacitor, just because the auto mechanic calls it by that name?

Larry

TJ McDermott
User Rank
Blogger
Re: Relay vs. Contactor
TJ McDermott   4/25/2012 9:58:21 AM
NO RATINGS
Boy, this story sounds a lot like the Maytag stories we've heard this year.

GlennA
User Rank
Gold
Relay vs. Contactor
GlennA   4/25/2012 9:23:34 AM
NO RATINGS
There is a difference.  Contactors are usually used when driving motors.  They have a higher voltage rating to prevent arc-over when stopping a motor.  Relays are often used in control circuits and have lower voltage ratings.  N.B. There is a voltage rating for the coil that pulls-in the contacts, and a different voltage / current rating for the contacts that drive the load..

<<  <  Page 2/2


Partner Zone
Latest Analysis
Multiple defenses to harden network infrastructures and better management of user access are defeating cyber threats that can be physical, procedural, or electronic.
Linear guides are one of the most important components required for the design of automated or computer-controlled equipment. Aluminum profile extrusions, used for these guides, can enable designed-in functional features.
UL is working on four major initiatives aimed at 3D printing and additive manufacturing.
The oil and gas and power industries will combine for a hefty 45 percent of the global medium-voltage motors market, with oil and gas investments worldwide pushing demand.
A team from MIT's Computer Science and Artificial Intelligence Lab (CSAIL) has developed a breakthrough new multi-material 3D printer.
More:Blogs|News
Design News Webinar Series
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
6/25/2015 11:00 a.m. California / 2:00 p.m. New York
6/24/2015 11:00 a.m. California / 2:00 p.m. New York
6/11/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 31 - Sep4, Embedded System Design Techniques™ - Writing Portable and Robust Firmware in C
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service