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  1. Thread: Lost power

    by gar
    Replies
    16$$
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    661

    190722-0915 EDT Today it is interesting to see...

    190722-0915 EDT

    Today it is interesting to see how the outage map has changed or not.

    Ann Arbor is mostly cleaned up, but north of us toward Brighton not much change.

    In the Detroit area...
  2. Thread: Lost power

    by gar
    Replies
    16$$
    Views
    661

    190721-2421 EDT Yesterday's storm created many...

    190721-2421 EDT

    Yesterday's storm created many more outages.
    https://www.clickondetroit.com/weather-center/dte-energy-360000-customers-without-power-after-severe-storms

    There is some disparity...
  3. 190721-2237 EDT pendragon: You are working...

    190721-2237 EDT

    pendragon:

    You are working with a rule based system which may not relate to logic. You need to know what are the legal rules, probably public service commission defined, and how...
  4. Thread: Power generation

    by gar
    Replies
    0$$
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    116

    Power generation

    190721-1154 EDT

    It is interesting to note the capability of pumped storage. The Ludington MI plant has a capacity of 2172 MW or 10 % of lower Michigan's peak demand. We need more of these.

    From...
  5. Thread: Lost power

    by gar
    Replies
    16$$
    Views
    661

    190721-0751 EDT GMc: It was not Generac. ...

    190721-0751 EDT

    GMc:

    It was not Generac.

    New outage information.

    As I mentioned my power was restored yesterday. But later in the day yesterday another big storm came thru. To an extent...
  6. Thread: Lost power

    by gar
    Replies
    16$$
    Views
    661

    190720-1119 EDT My power is restored, but the...

    190720-1119 EDT

    My power is restored, but the outage map still shows us as out.

    During the outage I used about 12 gallons of gasoline.

    My neighbor is still going to get a generator. From...
  7. Thread: Lost power

    by gar
    Replies
    16$$
    Views
    661

    190720-0940 EDT GMc: My neighbor only needs...

    190720-0940 EDT

    GMc:

    My neighbor only needs a 5 kW portable. It will more than cover his basic needs. In our area one's basic needs are not much more than 1 to 2 kW, and extra capacity is...
  8. Thread: Lost power

    by gar
    Replies
    16$$
    Views
    661

    190720-0823 EDT Our power is still out as I...

    190720-0823 EDT

    Our power is still out as I would expect, and the outage map looks about the same.

    Last night I told my neighbor that if they had some stuff that needed to be in the freezer...
  9. Thread: Lost power

    by gar
    Replies
    16$$
    Views
    661

    Lost power

    190719-2347 EDT

    Storm damage caused us, and many others to loose power, about 60,000.

    From what I could observer close by, a much larger area than usual was out. Also my daughter lost power and...
  10. Replies
    18$$
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    971

    19071-1943 EDT When I made the last post there...

    19071-1943 EDT

    When I made the last post there were 12 motors, now none.

    If you search for treadmill DC motors you will find many. Look for low cost, you don't really need quality. Your...
  11. Replies
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    190719-1624 EDT nickelec: A motor/generator...

    190719-1624 EDT

    nickelec:

    A motor/generator like the following is quite inexpensive, and might be good for experiments. It is a permanent magnet field type. Might require external blower for...
  12. Thread: Faulty Transformer

    by gar
    Replies
    16$$
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    717

    190719-1224 EDT RV6: Real power going into...

    190719-1224 EDT

    RV6:

    Real power going into a load is no greater than the input volt-amperes.

    Your unloaded VA to the transformer is small, therefore the noload real power input (heat being...
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    519

    190719-0912 EDT danickstr: I would not...

    190719-0912 EDT

    danickstr:

    I would not blame the LED.

    Put a high impedance DVM across a glowing LED, 10 megohms is a typical meter impedance. I would not expect the LED to stop glowing. Read...
  14. Thread: Dimming complaints

    by gar
    Replies
    36$$
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    1,173

    190718-2351 EDT synchro: I used a different...

    190718-2351 EDT

    synchro:

    I used a different technique, but the result is the same.

    .
  15. Thread: Dimming complaints

    by gar
    Replies
    36$$
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    1,173

    190718-2313 EDT nickelec: Your measurements...

    190718-2313 EDT

    nickelec:

    Your measurements after correction do not correlate with a a center tapped single phase transformer with mostly resistive loading, and no major source series...
  16. Thread: Dimming complaints

    by gar
    Replies
    36$$
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    1,173

    190718-2002 EDT If that was a 3 phase wye...

    190718-2002 EDT

    If that was a 3 phase wye source, then wye line to line voltage would be about 193 V.

    .
  17. Thread: Faulty Transformer

    by gar
    Replies
    16$$
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    717

    190718-1943 EDT When you measure the real...

    190718-1943 EDT

    When you measure the real power input to an unloaded transformer, then that power defines the transformer temperature rise over ambient for whatever cooling conditions exist.
    ...
  18. Thread: Dimming complaints

    by gar
    Replies
    36$$
    Views
    1,173

    190718-1625 EDT nickelec: The voltage...

    190718-1625 EDT

    nickelec:

    The voltage readings you took are next to useless in trying to determine the cause of your light dimming problem.

    Phase to phase should be 118 + 105 = 223. The 105...
  19. Thread: Faulty Transformer

    by gar
    Replies
    16$$
    Views
    717

    190718-1307 EDT Jaref's ballpark for PF = 0.3...

    190718-1307 EDT

    Jaref's ballpark for PF = 0.3 is certainly a good estimating value with no other knowledge available.

    I checked PF on two small transformers using a Kill-A-Watt EZ:

    1....
  20. Replies
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    971

    190718-1224 EDT Besoeker3: I mentioned that...

    190718-1224 EDT

    Besoeker3:

    I mentioned that in post #2.

    With small surplus components it should not cost a lot to make a good experimental setup.

    .
  21. Replies
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    971

    190718-1056 EDT To add to my post #12. 8....

    190718-1056 EDT

    To add to my post #12.

    8. If you want to maintain the same mechanical power output at the same speed after reducing the field excitation to a lower flux density, then this means...
  22. Replies
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    971

    190717-2219 EDT A full wave rectified sine...

    190717-2219 EDT

    A full wave rectified sine wave has an RMS value equal to the RMS of the sine wave without rectification, and this is 0.707 of the sine wave peak. Whereas the average value of a...
  23. Thread: Faulty Transformer

    by gar
    Replies
    16$$
    Views
    717

    190717-2107 EDT Sorry I did not see the center...

    190717-2107 EDT

    Sorry I did not see the center tapped winding. Yes the voltages as displayed in the post are good.

    .
  24. Replies
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    971

    190717-1944 EDT nickelec: I would describe...

    190717-1944 EDT

    nickelec:

    I would describe the torque speed relationship as follows:

    1. Torque is determined by the load. Whether the motor can supply the required torque is a function of...
  25. Thread: Faulty Transformer

    by gar
    Replies
    16$$
    Views
    717

    190717-1799 EDT RV6: I don't think this...

    190717-1799 EDT

    RV6:

    I don't think this electrician knows what he is talking about. What would be the definition of unbalanced power? Does he mean unbalanced voltage? You don't have that. Your...
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