Properly Sizing an Overload

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Viable option, not too involved:

Allen Bradley enclosed mag starter with E1 Plus SS OL relay, line voltage control (so no control transformer is necessary), Start-Stop PB on the cover.

It's not just because they happen to sign my paycheck twice a month (I'm in a different division anyway), it's because I know that the aux contacts on the E1 Plus SSOL are rated for up to 600VAC, making them suitable for using line voltage control, regardless of your line voltage. The E1+ is also one of the few SSOLs that does not need a separate source of control power, it is powered by the current flowing through it, and it has true current based phase loss protection built-in.


IEC version, you can get it with a NEMA starter too.
View attachment 11806

There may be other options out there, but nobody pays me to care any more... :cool:

Wow, that's perfect and exactly what I need. I see these are available with IP66 boxes. Probably not cheap but that's AB! Great products though, you get what you pay for. I did find the
catalog for these now for the hard part which is deciphering and coming up with good PN's for ordering. Thanks Jraef for the pointer. Seriously, something like this is exactly what we need.
Minimum controls with good protection for our pump motors.
 
Viable option, not too involved:

Allen Bradley enclosed mag starter with E1 Plus SS OL relay, line voltage control (so no control transformer is necessary), Start-Stop PB on the cover.

It's not just because they happen to sign my paycheck twice a month (I'm in a different division anyway), it's because I know that the aux contacts on the E1 Plus SSOL are rated for up to 600VAC, making them suitable for using line voltage control, regardless of your line voltage. The E1+ is also one of the few SSOLs that does not need a separate source of control power, it is powered by the current flowing through it, and it has true current based phase loss protection built-in.


IEC version, you can get it with a NEMA starter too.
View attachment 11806

There may be other options out there, but nobody pays me to care any more... :cool:

I thought pretty much all the big players had a SSOL that needs no external power with an up to 600 V control contact. I know I have used Square D's (motorlogic?) and Siemens (ESP?) versions.
 
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