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  1. Thread: Faulty Transformer

    by zog
    Replies
    16$$
    Views
    627

    7.2.1.1 Transformers, Dry Type, Air-Cooled,...

    7.2.1.1 Transformers, Dry Type, Air-Cooled, Low-Voltage, Small
    Page 28
    ANSI/NETA MTS-2019
    NOTE: This category consists of power transformers with windings rated 600 volts or less and
    sizes equal...
  2. Thread: Faulty Transformer

    by zog
    Replies
    16$$
    Views
    627

    Why don't you just have the transformer tested?

    Why don't you just have the transformer tested?
  3. Thread: NYC power outage

    by zog
    Replies
    42$$
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    1,850

    Probably these guys again 23376

    Probably these guys again

    23376
  4. Replies
    28$$
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    2,642

    And here is a good presentation on the subject ...

    And here is a good presentation on the subject

    http://www.wmea.net/Technical%20Papers/0516_Arc_Resistant_Switchgear_Eaton_May_2016.pdf
  5. Replies
    28$$
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    2,642

    You seem to only be reading half of Jraefs posts....

    You seem to only be reading half of Jraefs posts. There is an ANSI standard for arc rated switchgear, which requires special design elements to be able to re-direct the arc blast. If your gear is not...
  6. Replies
    14$$
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    1,158

    Well they never co-existed. FPE sold the whole...

    Well they never co-existed. FPE sold the whole (USA) stab lok product line to ACBC in 1988
  7. Replies
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    1,158

    The UL listing and issue number are on the label....

    The UL listing and issue number are on the label. Should also get info in the box with more details.
  8. Replies
    3$$
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    317

    IEEE has defined five different voltage classes...

    IEEE has defined five different voltage classes for power distribution equipment.

    Low 600V or less
    Medium 601-69KV
    High 70-230KV
    Extra High 230-800KV
    Ultra High >800KV
  9. Replies
    30$$
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    3,786

    Get Some Now

    Get Some Now
  10. Replies
    30$$
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    3,786

    Ha, I was going to post the same thing. We just...

    Ha, I was going to post the same thing. We just talked about this at work the other day, I asked my fresh out of the Navy guy about the one I was taught and he laughed and said no way would that fly...
  11. Replies
    7$$
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    398

    Certified contractor or thermographer? Plenty of...

    Certified contractor or thermographer? Plenty of contractors out there with IR guns with no idea how to use them. A single temp doesn't tell you much, it is your delta T's that matter.
  12. Replies
    7$$
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    398

    Well there will be some heating, how much are we...

    Well there will be some heating, how much are we talking about? Was the IR scanning done by a certified thermographer?
  13. Replies
    41$$
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    2,301

    Easy to make claims against a company no longer...

    Easy to make claims against a company no longer in business (And that no longer has lawyers lol)
  14. Replies
    11$$
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    768

    Agree, but the question was specifically asked...

    Agree, but the question was specifically asked about power CB's, not molded case
  15. Replies
    11$$
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    768

    Mains typically will not have INST trips since it...

    Mains typically will not have INST trips since it is impossible to coordinate
  16. Replies
    1$$
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    1,553

    Nope, not unless it is labeled as Arc Resistant...

    Nope, not unless it is labeled as Arc Resistant per ANSI C37.20.7
  17. Replies
    4$$
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    1,810

    Try these, depends on the gear For low-voltage...

    Try these, depends on the gear
    For low-voltage PSG:
    •UL 891-2005: Switchboards for dead-front switchboards
    •UL 1558-2016: Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear...
  18. Replies
    41$$
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    2,301

    This is the only official notification on the...

    This is the only official notification on the matter, there was never a recall issued in the USA ...
  19. Thread: 480V switchgear

    by zog
    Replies
    5$$
    Views
    599

    Required? No. But do you want a single ground...

    Required? No. But do you want a single ground fault to take out that entire line up?
  20. Replies
    7$$
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    557

    Correct, it's the only safe way to do it. Keep in...

    Correct, it's the only safe way to do it. Keep in mind the gap in a VI is about 1/8" when the breaker is open, you want your life depending on a 1/8" gap. What if the VI loses vacuum? Do you know...
  21. Thread: federal pacific

    by zog
    Replies
    5$$
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    721

    As far as I know they all were besides a couple...

    As far as I know they all were besides a couple year period in the 80's??? Any of the American Circuit breaker ones should be UL listed. UBI ones should be listed as well.
  22. Replies
    10$$
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    632

    Should have temperature corrected values since...

    Should have temperature corrected values since that is what really matters as your final result.
  23. Replies
    10$$
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    632

    DAR and PI ratios, PI is usually only done on...

    DAR and PI ratios, PI is usually only done on transformers and motors.
  24. Replies
    23$$
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    1,550

    It's not a breaker repair , it's a trip unit...

    It's not a breaker repair , it's a trip unit repair, or you can replace the trip unit with a new one. A new replacement for that breaker (PJA) should be around $5k (19k is insane)
  25. Replies
    23$$
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    1,550

    Nope, I'm sure it is the trip unit, a simple...

    Nope, I'm sure it is the trip unit, a simple secondary injection test will verify that.
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