MG-6 Relays 1

[buzzp]

Are the old multi-contact MG-6 relays still being specified? Is there something a little more modern (smaller) which can be used to replace the MG-6? This is 6 contacts rated for 30A for 1 minute (@12VDC) and 3A@125VDC for one minute. Continuous rating is 12A. Thanks for any suggestions.

 

[duki]

ABB-US still makes them and for sure you replace this relay with a G.E. HFA. Try this link

http://www.abbus.com/abbrelays/pdf/ILsIBs/Cs41/41-753.1M.pdf

 

[buzzp]

I realize these are still made by several different companies although they have different part numbers. However, these relays are unbelievably huge. The same contact rating can be had in a much smaller package. For example, protective relay contacts have the same rating as the MG-6 relays. I believe what makes finding a replacement so difficult is the number of contacts available. If anyone can identify one of these it would be great. In the meantime, I will continue my search.

 

[busbar]

This type of component is very conservatively rated and intended to be maintainable for long-life, high-reliability tripping duty. That, and they are intended to be used with tools like a diamond contact burnisher.

Typical application is with groups of single-function electromechanical protective relays like KD- or HU-series. Space-age, compact, sealed capabilities are not prime requirements for these devices.

For basic switchgear applications, something like an E-max Instruments assembly may do the work with similar reliability but using less panel space.

 

[buzzp]

Thats why I want to replace the MG-6, panel space. As far as long term maintainence, not a real big concern since, historically, these units have only tripped about 15 times in 50 years. Although, this does not mean it won't in the future. Unfortunatley, what I have found so far does not look real promising. I will check with Emax and see what they have but I think I will be stuck with the big MG-6 or similar. Thanks.

 

[jvamos]

Take a look at the LJ relay from Relay Associates.

http://www.relayassociates.com/relay.htm

 

[jbartos]

Suggestion: DC contacts are normally oversized because of the detrimental effect of DC arcs. However, even if the contacts are oversized, contact pitting is still there.

 

[buzzp]

Jvamos, Thanks for the link. This looks like a smaller package which is what I am after. Star for you.