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    140918-2213 EDT If by induced voltage you mean...

    140918-2213 EDT

    If by induced voltage you mean a magnetically generated voltage or current, then almost certainly it is not.

    Capacitive coupling might be a possibility. 400 ft times 80 pfd per...
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    140918-1919 EDT fifty60: Some more...

    140918-1919 EDT

    fifty60:

    Some more information on the OAC5 leakage current.

    Using a Powerstat and its voltage scale the leakage current varied as follows:
    120 is about 124 V.

    120 1.57 mA
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    140918-1847 EDT fifty60: There can be many...

    140918-1847 EDT

    fifty60:

    There can be many different inputs to an SSR as there can be many different SSRs. The typical SSR used to switch an AC load controlled by a DC input consists of a Triac...
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    140918-1442 EDT fifty60: Look at the Crydom...

    140918-1442 EDT

    fifty60:

    Look at the Crydom SMR 24 90 -x with proper heat sinking for direct drive from your 9 V source. Thus, only one SSR....
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    140917-2404 EDT The EPA mileage for vehicles...

    140917-2404 EDT

    The EPA mileage for vehicles are determined here in our town over some standardized path and driving pattern. I also believe that a programmed dynamometer test is run to provide...
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    140917-2338 EDT fifty60: You need to study...

    140917-2338 EDT

    fifty60:

    You need to study circuit theory to a greater extent. and the characteristics of various commerical products.

    You also need to respond to the responses to your...
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    140916-0853 EDT This discussion,...

    140916-0853 EDT

    This discussion, http://www.crydom.com/en/Tech/Newsletters/Solid%20Statements%20-%20SSRs%20switching%20types.pdf , should answer part of your question. Generally it is a good...
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    "The Road to the Transistor"

    140913-2307 EDT

    Going thru some papers I found a copy I had made several years ago of an essay titled "The Road to the Transistor". You can find a copy at...
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    One prediction on electric cars

    140912-2032 EDT

    One of the links from the Volt Forum " http://gm-volt.com/ "..

    http://www.hybridcars.com/eight-impressive-statistics-about-teslas-gigafactory/

    .
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    Storm Friday 5 Sept 2014 upto 75 MPH

    140909-2110 EDT

    Last Friday 5 September 2014 we had a mostly wind storm, some rain. with peak gusts of 75 MPH. DTE, about 2,000,000 customers, had 375,000 loose power. In my immeadiate...
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    The incandescent light bulb

    140908-2216 EDT

    A generally good discussion on the history and other aspects of The Incandesdent Light Bulb can be found at:
    http://en.wikipedia.org/wiki/Incandescent_light_bulb

    .
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    140908-1530 EDT USMC: If you have a very...

    140908-1530 EDT

    USMC:

    If you have a very large bank of PFC capacitors across the line, and very little load in comparison, then you are possibly way over-correcting for power factor.

    If so...
  13. Thread: Logging voltmeter?

    by gar
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    140906-2200 zbang: The following is an...

    140906-2200

    zbang:

    The following is an isolated amplifier for voltage or current sensing. But requires an isolated +5 VDC power supply on the input side....
  14. Thread: Logging voltmeter?

    by gar
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    140804-1705 EDT zbang: For the DC voltage...

    140804-1705 EDT

    zbang:

    For the DC voltage measurement you will need a differential input amplifier or an isolated DC input to output coupler. There are operational amplifiers with DC isolation....
  15. Thread: Logging voltmeter?

    by gar
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    140904-1442 EDT I have nothing specific to...

    140904-1442 EDT

    I have nothing specific to offer, but I have questions.

    1. What is the AC voltage range? How high does this float off of earth ground?

    2. Can an isolation transformer be used...
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    140827-2220 EDT mbrooke: You are correct...

    140827-2220 EDT

    mbrooke:

    You are correct that at 60 Hz and the same excitation voltage as at 50 Hz that the core will be driven less into saturation. Will the slight reduction in excitation...
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    140827-1100 EDT S_Dot: You list yourself as...

    140827-1100 EDT

    S_Dot:

    You list yourself as a power engineer. I would assume you could answer your own question, but I will try to clarify the question.

    Assumptions:

    The power company...
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    140827-0905 EDT mbrooke: How do you squeeze...

    140827-0905 EDT

    mbrooke:

    How do you squeeze more kVA out of a transformer? Only if you were to raise the voltage.

    To a large extent a transformer rating is current limited by I^2*R losses....
  19. 140827-0814 EDT dmc1701a: Why ask us to...

    140827-0814 EDT

    dmc1701a:

    Why ask us to conjecture what is happening when you should use your voltmeter to investigate the circuit operation? You might answer your own question. I can not...
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    140826-1632 EDT Some experiments on a Sq-D 500...

    140826-1632 EDT

    Some experiments on a Sq-D 500 SV1B transformer, about 20 years old.

    Measured unloaded power input and turns ratio. Applied 125.2 V to get 480 V on the primary. This is a ratio...
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    140826-2235 EDT mbrooke: Assuming the...

    140826-2235 EDT

    mbrooke:

    Assuming the design critera was about the same for the 50 Hz transformer as would be used for the 60 Hz design, then when the 50 Hz unit is on 60 Hz the maximum flux...
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    140825-2125 EDT No one should be propagating...

    140825-2125 EDT

    No one should be propagating such nonsense. Yes it is a myth.

    In a tightly coupled transformer, meaning a very high percentage of the primary magnetic flux couples to the...
  23. 140825-0917 EDT prs1jazz: What are your max...

    140825-0917 EDT

    prs1jazz:

    What are your max and min power values during the day shift when production is running? What is the typical kWHs per day?

    If the entire heating process from room...
  24. 140824-1950 EDT prs1jazz: I believe your...

    140824-1950 EDT

    prs1jazz:

    I believe your last post has now completely changed the question. Several aspects are not clear relative to the new question.

    You are a foundry. That may mean large...
  25. 140824-1556 EDT prs1jazz: Core loss is a...

    140824-1556 EDT

    prs1jazz:

    Core loss is a resistive load. Power factor correction has nothing to do with changing core loss (core loss is a resistive load, heat) except in very minor residual...
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