When a relay specs says Normally Open Contacts: 40A @ 277VAC, resistive; 6K Ops. (Flange Mount); 30A @ 120/277VAC, resistive; 10A @ 600VAC, resistive;
This means at 600VAC I can only use it up to 10A?
link to datasheet
formatting link
Relay Datasheet question?(Warning Google Group User)
Nov 15, 2010
3 Replies
fernan wrote in news: snipped-for-privacy@n24g2000prj.googlegroups.co m:
Yes 10 amps into a "RESISTIVE LOAD" at 25C.
You also have to derate further for your expected maximum ambient temperature and if your load is reactive "inductive /capacitive" which it likely is.
snipped-for-privacy@n24g2000prj.googlegroups.co
Thanks for the response. This is assuming I switch it at 600Vac and its carrying atleast
10Amps. Once it switch closed it should still be able to deliver 30Amps regardless of voltage?"fernan"
Thanks for the response. This is assuming I switch it at 600Vac and its carrying at least
10Amps. Once it switch closed it should still be able to deliver 30Amps regardless of voltage?** Sure - but it will not reliably switch OFF a current of 30 amps at 600 VAC.
Breaking capacity is what it is all about.
.... Phil
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required