Greetings,
Some time ago, I raised the question about Mercury switches to the
group. It was determined that Scandinavia would not allow Mercury type
switches. We went with a relay recommended as an alternate by the
mercury switch vendor. Since then we have had problems with contact
arcing (it is switching 40A at 230V) and spikes getting back on the
24V control line. Diodes and surge suppressers have been installed.
And seem to have fixed the problem for now. (This is also a relay used
to shut off the power to a heater circuit, when the coolant is low, or
a some other fault occurs. So I believe a open contact is required
over a solid state relay).
My question is, has anyone seen a good replacement for a Mercury
displacement relay for switching high currents? It appears that the
design of the MDR is superior over dry contact type relays. I've
checked with most of the big relay manufacturers and have not found a
good solution.
Thank you, and I hope that you all have a Happy Holiday Season,
Ray Russell
Leco Corporation
3000 Lakeview Ave.
St. Joseph, MI 49085-2396
Ph (616) 983-0308
Fx (616) 982-8964
email: [email protected]
