1. Ask the Expert TODAY!
    Learn how to do more with less when it comes to your fertilization services. Gather your top questions about fertilization and nutrient management and join the live Ask the Expert event hosted by Koch Turf & Ornamental TODAY at 12-2 p.m. ET in the Fertilizer Application forum .

    Dismiss Notice

Pump start relay makes loud buzzing

Discussion in 'Irrigation' started by ArTurf, Jul 14, 2012.

  1. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Messages: 7,961

    I wired in a 480 3 phase contactor hot one time.

    It was on a lead/lag vacuum pumps system in a hospital.

    I was sweating bullets. No need to take chances.
     
  2. 1idejim

    1idejim LawnSite Fanatic
    Messages: 11,315

    i have 25kva gloves but that doesn't mean i bare hand 12.5 wire.

    what i do, i do pretty well. what i don't do well i leave alone.
    Posted via Mobile Device
     
  3. jvanvliet

    jvanvliet LawnSite Gold Member
    Messages: 3,944

    Geez... :dizzy:
     
  4. jvanvliet

    jvanvliet LawnSite Gold Member
    Messages: 3,944

    No brain no pain eh?
     
  5. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Messages: 7,961

    It was kind of an emergency... one of many I had as a young man fresh out of school and placed as a Chief Engineer in a hospital. Too many sleepless nights.

    I should tell you about the night we ran out of oxygen, or the night we lost heat....Lost most my hair in a short 6 month before I decided to walk.
     
  6. ArTurf

    ArTurf LawnSite Platinum Member
    Male, from Ark
    Messages: 4,383

    Went back today and took readings. Readings checked out OK, the contacts seemed to be burned and I noticed a small spring in the bottom of the box. So I decided to replace the contactor. After pulling the old one out I realized the spring was 1 of 2 that held the contacts apart. Everything working fine now.

    david i phone 012.jpg
     
  7. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Messages: 7,961

    Cool. Happy it worked out.
    Do you have a megger to check the pump motor windings.

    Often these contactor issues develop over time and can cause some over heating that will weaken motor windings. I would only worry about it if you want to be preventive.
     

Share This Page