Pump Start Relay Question

Discussion in 'Irrigation' started by jvanvliet, Feb 20, 2012.

  1. jvanvliet

    jvanvliet LawnSite Gold Member
    Posts: 3,939

    Anybody familiar with a TECO 220VAC single pole 7.5 HP pump start relay model 130674 and TECO "Ice Cube" relay model GMC-6M?

    Rainbird ESP M controller; 7.5 HP 220VAC Single phase Baldor motor.

    Everything wired correctly (as far as I know). Turn on breaker & trips master breaker (40AMP) Disconect ice cube from the master valve terminal on the time clock & no line problem.

    Swapped controllers; same symptoms.

    WTF?

    Need pictures? Will provide.:dizzy:
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,315

    Does the Baldor motor run at all without tripping a breaker?
     
  3. jvanvliet

    jvanvliet LawnSite Gold Member
    Posts: 3,939

    Yes it does.
     
  4. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,308

    :hammerhead:sorry, read the post wrong:hammerhead:
     
    Last edited: Feb 20, 2012
  5. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,315

    Maybe there are burned contacts on the relay. I can't imagine anything in a power relay that itself would present a short, although you'd check it with a meter anyway. You also want might current readings on the motor.
     
  6. jvanvliet

    jvanvliet LawnSite Gold Member
    Posts: 3,939

    Did that, all is nominal.

    Only time it trips the breaker is when I hook up to the MV block on the controller. Checked voltage from the transformer 26v (+ -) steady. Checked ground, checked common, checked line/load, amperage; double checked wiring everything OK.

    Possibly a bad ice cube relay, will disconnect & replace the ice cube from the relay and see what happens.

    Would like to call the manufacturer.
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,315

    Why not feed the power relay directly from a separate 24vac wallwart?
     
  8. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,308

    i had a similar situation with a goldline aqua-logic complete controller for a saltwater swimming pool. all wiring was good and all measurements on line. called the manufacturer and got the runaround from the troubleshooter. i must of called the troubleshooting line a dozen times and was on hold talking to the secretary, just bsing when she asked if i had run my finger under the backside of the relay when it was off? there was a titt that when open could be felt and was flush to the surface when closed. this relay was stuck mid span allowing it to arc and trip the breaker. i sent her flowers :)

    post some pics
     
    Last edited: Feb 20, 2012
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,315

    Those kind of flaws are what I expect would be caught out before a device ever got official approvals. Then again, I installed any number of Febco 805Y DCVAs, and we know how they've been doing.

    Anyway, I think the icecube relay would be incapable of tripping a pump's breaker, no matter what.
     
  10. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,308

    that's why i'd like to see some pics
     

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