Was it an intermittent or continuous duty contactor?

John

Sent from my iPad


> On Nov 13, 2013, at 6:04 AM, "Adam Molny" <Adam@ValidationPartners.com> wrote:
>
> Paul -
> The gear relays are activated by applying a small current to the relay coil
> terminals. That pulls the main contacts closed against a strong spring. When
> you remove power the spring pulls the main contacts apart. There is a known
> failure mode where the main contacts weld themselves together. When that
> happens the relay will remain in the "on" state regardless of what the
> pressure switches are doing.
>
> -Adam
> -----Original Message-----
> From: Paul Miller [mailto:pjdmiller@gmail.com]
>
> Adam, I don't understand how this happens unless the pressure switches on
> the pump aren't shutting down.
>
> Paul
>
>
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