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Halogen Bulb mA Consumption, Measuring with a Meter, and 18V, 12V, 230V, or 220V Varieties

xerif 23092 8
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  • #1 5613387
    xerif
    Level 14  
    I have been tormented by this thought for a long time.
    How many mA (maybe A?) Does a halogen bulb take? And how to check it with a meter so that you don't ask more such questions? :P

    And are there halogens on 18V? Someone told me this, but I found it nonsense, because I only "know" 12V and 220V halogen bulbs.

    And by the way: 230V or 220V?
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    #2 5613407
    majonez1990
    Level 14  
    Well, check the power consumption of the bulb, you can check with an ammeter by plugging it in series between the power supply and the bulb

    And by the way, it's 230v
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    #3 5613417
    fuutro
    Level 43  
    If you have any associations that the bulb is a normal resistor, forget about them. The bulb resists the exponential function of temperature. The consumption can be checked with an ammeter. I have never heard of 18V halogens either.
    With this 220 / 230V it is more or less that before us, one of the normal voltage values was 220VAC, and now it is 230VAC according to the standards, but there is one more detail - the tolerance of the mains voltage is (probably) + 5%, -10% so and the value of 220V is quietly located there. Therefore, it is not necessary to modify even older devices.
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  • #4 5613459
    xerif
    Level 14  
    Thanks for the succinct answers.
    I have a request, I need, by eye, how much the bulb takes, I cannot check, unfortunately (no bulb), knows (or checked) this value?

    And when it comes to the meter - is it about the 10A mode?
  • #5 5613568
    fuutro
    Level 43  
    On the "eye", such a bulb consumes as much as the power / voltage of the supply. When it is cold, it jerks more.
  • #6 5613695
    xerif
    Level 14  
    So A depend on the bulb heating (the higher the temperature, the greater the power, the greater the power, the more mA)? Does this only apply to halogens?

    Let's assume the bulb is 50W and powered by 12V. Then it pulls ~ 4.2A ?:
    50W / 12V ? 4.2A
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    #7 5614069
    fuutro
    Level 43  
    No, the other way around. The hotter the fiber, the greater its resistance and the further the current consumption decreases. Power is given for hot fiber. In the beginning, while it is still cold, it causes more current to flow. This applies to all types of light bulbs.
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    #8 5614646
    Maly
    Level 33  
    That's right, a 50W bulb at 12V will take about 4.2A, while at 230V only 0.22A
    Therefore, at lower voltages, thicker cables are used.
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    #9 5614817
    Lutek49
    Level 36  
    fuutro wrote:
    No, the other way around. The hotter the fiber, the greater its resistance and the further the current consumption decreases. Power is given for hot fiber. In the beginning, when it is still cold, it causes more current to flow. This applies to all types of light bulbs.


    That is why light bulbs most often burn out when turned on - "sudden flash and eternal darkness". In the cold state, they can draw a really large current, so sometimes a small current is used to preheat the bulb, which heats the fiber.
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Topic summary

The discussion revolves around the current consumption of halogen bulbs, specifically how to measure it using a meter and the various voltage options available, including 12V, 220V, and 230V. Users clarify that halogen bulbs do exist in 12V and 230V varieties, while the existence of 18V halogens is questioned. It is noted that the current draw of a halogen bulb varies with temperature; when cold, the initial current is higher, but as the filament heats up, its resistance increases, leading to lower current consumption. For example, a 50W halogen bulb at 12V draws approximately 4.2A, while at 230V, it draws about 0.22A. The importance of using an ammeter in series to measure current is emphasized, along with the understanding that older devices rated at 220V can operate safely on the current standard of 230V due to voltage tolerances.
Summary generated by the language model.
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