Results 1 to 11 of 11
  1. #1
    Join Date
    Sep 2002
    Posts
    12,195

    Where do you get current-sensing relays ?

    Yesterday I thought it would be simple: just get one from one of the refrigeration supply houses.

    Nope.

    So I called my local Honeywell distributor - 90% controls. And all they had was a RIB intended for residential use: humidifier or whatever.

    Under the gun to make this freezer work; I used it, with a transformer and isolating micro relay, to power the oil pressure safety heater. But a direct-use relay would have been Way simpler. <g>

    What and where do you all get them?
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  2. #2
    Join Date
    Jun 2005
    Location
    Las Vegas NV
    Posts
    1,152
    phm,

    It's odd the reefer supply houses don't have them.

    The Penn part number is R310AD-1C. It's used to prevent the lube oil control from tripping when power is interrupted.

  3. #3
    Join Date
    Sep 2002
    Posts
    12,195
    Thanks for the lead!

    That number you gave me (R310AD-1C) is actually a 24 volt version and won't work.

    But you getting me onto the Penn track here I found that a Penn # R310AE-1C is rated for 120/240 volts.

    PHM
    --------



    Quote Originally Posted by powell View Post
    phm,

    It's odd the reefer supply houses don't have them.

    The Penn part number is R310AD-1C. It's used to prevent the lube oil control from tripping when power is interrupted.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  4. #4
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,259

  5. #5
    Join Date
    Feb 2008
    Location
    Altmar, New York, United States
    Posts
    4,262
    try grainger.

  6. #6
    Join Date
    Jul 2006
    Location
    Atlanta, Georgia
    Posts
    62
    Those appear to be Hawkeye 800 current switches from Veris Industries rebranded for Johnson Controls. RIB also makes current switches with those same specs.

  7. #7
    Join Date
    Sep 2002
    Posts
    12,195

    Here's what a dope I am -

    We all spoke over the last weekend and then Monday I had to get the 208 volt freezer up and going. All day Monday I looked for an in-stock current sensing relay, (while rebuilding a steam boiler <g>) and finally had to go with a RIB 30 volt current sensing relay, a 10 amp micro-relay, and a multi-tap 24 volt transformer.

    Yesterday I was digging around for a 3 uf 440 volt capacitor and found, not one, but TWO of those exact RIB current relating sitting there in one of my parts drawers.

    I could have fixed the dam thing in one trip! And it's a huge distance for me these days - 35 miles each way. I generally don't go out more than 10 miles from the office.

    I have no idea why I would have ever bought them - but there there were. I was just glad that the Honeywell boys only had one in stock this time or I'd have three of them in the truck now. <g>
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  8. #8
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,386

  9. #9
    Join Date
    Jun 2009
    Location
    Charlotte, NC
    Posts
    32
    United Refrigeration carries them in our area and so does grainger

  10. #10
    Join Date
    Jun 2006
    Location
    Omaha, Nebraska
    Posts
    861
    I used to order boatloads of them from Kele Supply.

  11. #11
    Join Date
    Feb 2004
    Location
    Medford Oregon
    Posts
    807
    Current Relay only used on compressors with “inherent” protection

    Ex: 9RS2-0765-TFC the “F” in TFC refers to inherent protection
    EAV1-0200-TAC the “A” in TAC refers to inherent protection
    If it’s not a “A” or an “F” you don’t need a current sensing relay

    people who have oil trips from other causes buy and install a current sensing relay 'cause they don't know what to do. Most times this is wrong!

    here is quote from Copeland Engr bulletin AE 8-1314:
    The Current Sensing Relay Used With Compressor
    Inherent Motor Protectors:
    A compressor may exhibit nuisance trips if it has an
    inherent protector and experiences motor overheating.
    The use of a current-sensing relay allows the compressor
    to cycle on the internal inherent protector without affecting
    the operation of the Sentronic

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event