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Type: Posts; User: Besoeker3

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  1. Actually, you don't need either.

    Actually, you don't need either.
  2. VA, not W And all you need to do is multiply the...

    VA, not W
    And all you need to do is multiply the current by the voltage ratio.
    That gives you the 43.3A
  3. Replies
    3$$
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    83

    Depends on what you call fairly low. With a good...

    Depends on what you call fairly low. With a good sized DC choke and nearly level DC current, the current harmonics are roughly the reciprocal of the harmonic number.
    For a six-pulse rectifier front...
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    Some real highbrow comments here.... :p

    Some real highbrow comments here....
    :p
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    11$$
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    633

    No issues that I'm aware of. But being from UK we...

    No issues that I'm aware of. But being from UK we don't work with the NEC.
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    11$$
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    633

    Agreed. We Grossen Metrawatt power analysers in...

    Agreed. We Grossen Metrawatt power analysers in our MV panels.
  7. Why not just stick with kW? Power is power. For...

    Why not just stick with kW?
    Power is power.
    For me, and most of the rest of the world, HP is a redundant unit.
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    4$$
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    Could it be tripping on unbalanced phase voltages...

    Could it be tripping on unbalanced phase voltages like phase loss?
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    15$$
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    620

    Good point. I did the calcs and they don't equate...

    Good point. I did the calcs and they don't equate to 5HP (3.7kW) motor.
  10. Replies
    15$$
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    620

    Yes, that would be my starting point. That and...

    Yes, that would be my starting point. That and the voltage. It could be a bad connection somewhere/anywhere on the supply side.
    Or just a bad motor. How much would it cost to replace it? Probably...
  11. Thread: Max Breaker

    by Besoeker3
    Replies
    17$$
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    885

    Max breaker? I don't want to break Max.......:D...

    Max breaker?
    I don't want to break Max.......:D

    Sorry mods...........:(
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    That would have been helpful information at the...

    That would have been helpful information at the outset.
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    18$$
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    663

    The OP says it is ungrounded.

    The OP says it is ungrounded.
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    20$$
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    843

    Thank you, LF. My ignorant Brit brain is...

    Thank you, LF.
    My ignorant Brit brain is constantly being upgraded here.......:D
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    843

    SEWAG?

    SEWAG?
  16. Replies
    20$$
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    843

    How hot?

    How hot?
  17. Thread: Voltage Drop

    by Besoeker3
    Replies
    12$$
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    715

    Good question. I'm with Junkhound on this. I...

    Good question. I'm with Junkhound on this. I can't see a gate opener taking anything like 30A.
  18. I'll try not to get steamed up about...

    I'll try not to get steamed up about it..............:p
  19. OK, pedant strikes again - and will probably get...

    OK, pedant strikes again - and will probably get shot down for it again......:D

    These are not metric units, they are SI (Système international).
    You can't measure Watts by the metre.
  20. If the motor slowed down significantly, the...

    If the motor slowed down significantly, the current rise, probably to tripping levels.
    I'd be inclined to think it is a hydraulic issue.
  21. Replies
    17$$
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    1,076

    Can't these transformers turned off instead of...

    Can't these transformers turned off instead of left energised? A simple isolator on the primary of each.
  22. Thread: UPS

    by Besoeker3
    Replies
    9$$
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    479

    I agree. That's their purpose in life. Think...

    I agree. That's their purpose in life. Think about what the U stands for.
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    21$$
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    907

    That's a relay??

    That's a relay??
  24. Thread: Altitude

    by Besoeker3
    Replies
    20$$
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    1,350

    Like your sense of humour - and, yes that's how...

    Like your sense of humour - and, yes that's how we spell it........:)

    A bigger challenge than altitude for us was ambient. Many of the switch rooms had aircon. But not the tin mining dredgers up...
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    8$$
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    Are you talking about the input power to the VFD...

    Are you talking about the input power to the VFD or the output from the VFD to the motor?
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