Electricity Stopped Suddenly
Last night our electricity stopped suddenly at a site that we have been at for the last 5 days... w/good power the entire time. I figured it was a power surge and my "protection" device cut things dow...
Forum Discussion
wa8yxm wrote:MrWizard wrote:
EMS power management system ?
transfer switch ?
30amp switch as either/or contacts, something is always connected, unless its an internal connection problem
BUT 50 amp switch has TWO relays
one for shore, one for generator
control board failure in the TS and neither one works
Not always true
Some ATS units have separate normally open relasys for Shore and Generator (And optionally inverter)
Some have only a single Double Throw Relay.. Now they may have 3 of them (one for each leg and one for Neutral) but something is always connected.. Usually shore on those.. Generator power only connects after the generator has been running for a half to one and a half mninutes.
I have worked with both types of switches.
I don't think I have ever seen an OEM 30 amp switch with two relays
Only one relay
Yes you could have seen a two relay 50amp switch used as replacement in a 30 amp service, it should never fail
And yes I have seen three relay switches
Shore power , generator, inverter
I only described the single relay 30 amp and the two relay 50 amp,
Because we don't know what service the op has
