Alternative for Joslyn Clark DC contactor for braking resistor.
Alternative for Joslyn Clark DC contactor for braking resistor.
(OP)
Hi Folks
Any alternatives to this unit, they are obsolete now and very expensive ($4000.00). My armature volts is 240V and 89A. The problem with these I think is the small copper square ring around the laminated plates, this ring cracks or opens and I'm thinking it is the culprit causing the contactor to chatter. I have spot welded the ring with good results but would like to just find a newer unit to replace these, we have three. Currently checking into an AB product.
Recommendations anyone?
Thanks, Chuck
Any alternatives to this unit, they are obsolete now and very expensive ($4000.00). My armature volts is 240V and 89A. The problem with these I think is the small copper square ring around the laminated plates, this ring cracks or opens and I'm thinking it is the culprit causing the contactor to chatter. I have spot welded the ring with good results but would like to just find a newer unit to replace these, we have three. Currently checking into an AB product.
Recommendations anyone?
Thanks, Chuck





RE: Alternative for Joslyn Clark DC contactor for braking resistor.
This is a pic of my iron with broken ring, not sure what the technical term is of course.
RE: Alternative for Joslyn Clark DC contactor for braking resistor.
Joslyn Clark still exists, but is this PARTICULAR contractor obsolete? 240V DC rated contractors should not be too hard to find, but harder than they used to be as DC falls out of popularity. Be careful though, the contactor must have a DC current rating, you cannot assume that an AC contactor without the rating for DC will work, DC is much harder to switch.
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Alternative for Joslyn Clark DC contactor for braking resistor.
Good luck,
Dave
RE: Alternative for Joslyn Clark DC contactor for braking resistor.
RE: Alternative for Joslyn Clark DC contactor for braking resistor.
RE: Alternative for Joslyn Clark DC contactor for braking resistor.
If you need a DC contactor try Eaton DC Crane Systems. SqD does not carry them anymore was bought by EC&M after the French bought SqD. EC&M has the best dc contactors around. Every crane in the steel mill that I retired from has nothing but EC&M (SqD) controls from 1 ton to 550 ton and about 40% of the rolling mills, Good Stuff.
Good luck,
Dave
ps google ec&m electric, not the magazine
RE: Alternative for Joslyn Clark DC contactor for braking resistor.
RE: Alternative for Joslyn Clark DC contactor for braking resistor.
RE: Alternative for Joslyn Clark DC contactor for braking resistor.
http://www.hubbell-icd.com/dcIndex.asp
In A-Bs product lines, there is a version of the 500 line of contactors (500DC) that has DC ratings on it, but it is no longer in the catalog. Sales are too low to devote the bytes I guess. It is still available however, you just need to have your A-B distributor find someone that knows this. Old farts like me do, the young punks often don't, they just ask the computer which has no relational database function that can extend its reach that far...
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington