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micromind micromind is offline

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Visitor Messages

Showing Visitor Messages 1 to 9 of 9
  1. Naman Verma
    03-22-2018 01:13 PM - permalink
    Naman Verma
    Hi Everyone , I have made an automatic star delta starter for 7hp motor when i start the motor in in manual mode the motor works in star connection for 3-4 seconds and when motor comes in delta connection it stops suddenly ...
    I have used schneider contactors of 25 amperes each

    Thanks in Advance
    Have a Nice Day
  2. Blaren
    11-11-2017 01:17 PM - permalink
    Blaren
    Hey,
    I really appreciate your reply on my wye delta vid question!
    I was hoping maybe you could help me out a little more.
    The motor not getting up to speed causing more draw, would that be because of more slip?
    And vfd or no vfd, the 480 is what matters, not the v/hz or anything like that.
    I knew the wye connection would essentially derate the motor power at the same 480 supply versus delta, but couldn't wrap my head around the increased draw, Especially since the purpose of the wye start is to reduce the draw.
    So not having enough power will not allow the motor to get up to speed, which will cause more slip and therefor more current?
    If the motor was well oversized and could get up to speed as connected wye, the current and temp wouldn't have been an issue?
    Thanks again!
  3. LATTC123
    10-26-2017 07:43 PM - permalink
    LATTC123
    So with the nameplate that I sent u, why didn’t they disclose T10,T11, & T12 ... thanks again sir
  4. LATTC123
    10-26-2017 07:42 PM - permalink
    LATTC123
  5. bad_crimp90
    09-19-2016 12:23 PM - permalink
    bad_crimp90
    Thanks for your reply Rob, ill just be testing the waters here in Central California, if all else fails at least i know theres alot of work in Nevada.
  6. bad_crimp90
    09-16-2016 01:12 PM - permalink
    bad_crimp90
    hey Micro, i noticed you were located in Fernley, pretty damn close to where my parents are moving, Fallon....i was curious as to how much work is available for electricians or apprentices in that area? I am in the process of becoming an apprentice here in California with the IBEW, thanks for any input.....Allan
  7. cthom
    08-31-2014 10:18 PM - permalink
    cthom
    Hi there,
    Was reading one of your previous posts about 3phase motors connected for wye-delta starting. I have a 6-lead motor that needs to be connected to a wye-delta contactor setup, but the motor leads are just 2 labeled T1, T2, T3. Does it really matter what the polarity of the windings are, and if so how do I determine this is they weren't labelled from the rewind.

    Thanks in advance,
    Corey
  8. micromind
    10-11-2012 09:19 PM - permalink
    micromind
    If the 480 side of the transformer is a delta connection (almost all of them are), there is no place to land the neutral.

    It cannot go anywhere on the low side; they are different systems.

    A delta connection on the primary side of a transformer, by its nature, is a 3 phase 3 wire connection.

    A wye connection can be 3 phase 3 wire, or it can involve the neutral. This is because a wye has a common point where all 3 coils are connected, a delta does not.

    Once you connect a couple of them, 3 phase transformers are actually easy.

    Best of luck,
    Rob
  9. jcar302
    10-07-2012 08:20 PM - permalink
    jcar302
    Rob, i'd just like to thank you for your posts here: http://www.electriciantalk.com/f2/tr...-feeders-3433/

    In hours of reading today for connecting the identical transformer, so many posts or responders forget where they come from.
    Not everyone connects transformers often and in a competitive market sometimes you just have to learn on the fly. You gotta learn somewhere.
    I do have my old boss (who's like 80 now) to guide me, but it sure as hell helps to at least sound like i know what i'm talking about when he comes by for guidance.
    Your post was not only the most respectful but very informative.
    Enough so that i joined this forum to send you this message.

    I'll end this with one last question, that at this point i do not fully understand, if i'm reading this right, i do NOT need to bring the neutral in from the 480 panel?
    Is that right and why?

    I appreciated your input.
    Thanks,
    Joe

About Me

  • About micromind
    What is your electrical related field/trade:
    Journeyman Elactrician
    General Location
    Fernley, Nevada (near Reno)

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General Information
  • Last Activity: Yesterday 11:33 PM
  • Join Date: 08-11-2007
  • Referrals: 0

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Mentions

06-03-2020
06:09 AM - splatz mentioned micromind in post Sad Day.......
...y to hear this news micromind. Your post was very...
05:25 AM - flyboy mentioned micromind in post Sad Day.......
My condolences micromind.
04-20-2020
09:19 PM - John Valdes mentioned micromind in post What are the top UL listed motors?
...tion for sure. Rob micromind knows this business ...
02-09-2020
12:59 PM - Switched mentioned micromind in post How Do You Find GOOD Help?
micromind is correct. As contr...
10-09-2019
06:11 PM - 460 Delta mentioned micromind in post Remotely-triggerable 3 phase power switch
...ding this wrong? As micromind said, a NEMA 1 start...
09-15-2019
06:08 PM - 460 Delta mentioned micromind in post 25 hp Wye Delta motor problem
...rect? If so then as micromind says at least double...
08-18-2019
08:35 PM - 460 Delta mentioned micromind in post
06-08-2019
11:36 PM - JasonCo mentioned micromind in post Typical nut sizes for pole bases?
...ro at any sport. micromind Damn good informatio...
03-10-2019
11:28 AM - abean707 mentioned micromind in post Lift Battery Charger Voltages
CoolWill micromind frenchelectrician Th...
06-28-2018
12:06 PM - splatz mentioned micromind in post Emergency amp load setpoint to 110v control valve
...g the lines of what micromind suggested using a PI...
06-25-2018
08:52 AM - splatz mentioned micromind in post 4-022 of CE Code 2018
...ecent remarks from micromind have me reconsiderin...
05-26-2018
02:23 PM - splatz mentioned micromind in post Help me be great at my new job.
...g the lines of what micromind and John M. said, on...
04-18-2018
10:30 AM - Yellow World mentioned micromind in post 30amp transformer supplies multiple copiers and other stuff - can it work?
...ge giant thank you, micromind! I've read your pos...
04-14-2018
08:12 PM - Yellow World mentioned micromind in post 30amp transformer supplies multiple copiers and other stuff - can it work?
Good morning! micromind: There's only one tr...
10-16-2017
06:23 AM - splatz mentioned micromind in post Logged Out But Not By Me
... With backstay, micromind, and me, it's going ...
10-15-2017
10:43 PM - emtnut mentioned micromind in post Logged Out But Not By Me
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10-12-2017
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10-07-2017
11:19 AM - emtnut mentioned micromind in post
04-01-2017
08:57 PM - emtnut mentioned micromind in post Kobalt 60 gallon compressor
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Quotes

07-02-2020
12:40 AM - cuba_pete quoted micromind in post
06-28-2020
05:16 PM - JoeSparky quoted micromind in post Doing company vehicle maintenance off the clock
This^^^^!!!! The very few emp...
04:55 PM - micromind quoted eddy current in post Doing company vehicle maintenance off the clock
Bad move for the company IMO. Mo...
06-27-2020
11:34 PM - micromind quoted CoolWill in post Doing company vehicle maintenance off the clock
If you have to maintain it of...
11:33 PM - flyboy quoted micromind in post Doing company vehicle maintenance off the clock
I have a company van, I do all...
06-26-2020
05:54 AM - paulengr quoted micromind in post uneven amp draw
Especially with a high-strung ...
06-25-2020
09:30 PM - micromind quoted Cow in post uneven amp draw
A little bit of a voltag...
06-24-2020
11:12 PM - micromind quoted Jarp Habib in post I don’t like
20-30 year old #18 solid fixtur...
06-22-2020
11:25 PM - Cow quoted micromind in post I Could Use Some Help With Transformer Selection
Doesn’t Square D make a comb...
11:09 PM - micromind quoted 460 Delta in post I Could Use Some Help With Transformer Selection
Doesn’t Square D make a comb...
08:58 PM - 460 Delta quoted micromind in post I Could Use Some Help With Transformer Selection
I would do the same thing........
08:54 PM - micromind quoted 460 Delta in post I Could Use Some Help With Transformer Selection
If it were me, I would probabl...
06-21-2020
07:16 AM - 460 Delta quoted micromind in post My Competition
That's me! I've never been ...
06-20-2020
09:06 PM - micromind quoted 460 Delta in post My Competition
Remember, if you didn’t do a...
06-19-2020
10:52 PM - micromind quoted MotoGP1199 in post Gems of the Trade
I hate those style panels. No s...
06-18-2020
08:05 PM - micromind quoted John Valdes in post Old school build
I see the numbers after I clicke...
06-14-2020
11:28 PM - Bird dog quoted micromind in post Conductor Identification
DON'T POUND THE WIRES........t...
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06-05-2020
12:56 AM - macmikeman quoted micromind in post
06-04-2020
11:17 PM - micromind quoted 99cents in post

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