Home Garden
# Home & Garden >> Building & Remodeling >> Building Designs

How to Calculate Fuse Size for Transformers

Transformers are devices that transfer voltage between circuits from one level to another through electrical induction. Transformers are primarily used to move high voltage to lower voltage for the purposes of power distribution. While transformers come in a variety of sizes for use in small electronics to wide-scale local and national power distribution, all operate under the same principles. Electrical fuses are an over-current protection device designed to prevent an overload between a power source and a circuit such as a transformer and the branch circuit for which it is providing voltage.

Things You'll Need

  • Calculator
Show More

Instructions

  1. Calculating Fuse Size for the Primary Side of a Transformer

    • 1

      The primary side of a transformer refers to high-voltage side of the transformer. Determine the volt-ampere or VA rating for the primary side of the transformer by multiplying the voltage and amperes and dividing the product by 1000. The result is the transformer's input amperage.

    • 2

      Divide the VA rating by the voltage of the transformer. The quotient determines the percentage of amperage a fuse needs to be smaller than the VA rating of the transformer.

    • 3

      Use a fuse size based upon the results using the National Electric Code standards as a guide.

    Calculating Fuse Size for the Secondary Side of the Transfomer

    • 4

      The secondary side of a transformer refers to low voltage side of the transformer. Determine the volt-ampere or VA rating for the primary side of the transformer by multiplying the voltage and amperes and dividing the product by 1000. The result is the transformer's output amperage.

    • 5

      Divide the VA rating by the voltage of the transformer. The quotient determines the percentage of amperage a fuse needs to be larger than the VA rating of the transformer.

    • 6

      Use a fuse size based upon the results using the National Electric Code standards as a guide.

Previous:

Next:

Building Designs
  1. How to Calculate for Low Voltage Transformer Line Loss
  2. How to Calculate a Pond Filter Size
  3. How to Calculate Effective Particle Size
  4. How to Calculate Air Cleaner Size
  5. How to Calculate Return Duct Size for an HVAC
  6. How to Calculate Pipe Sizes for Plumbing Fixtures
  7. How to Calculate Piers for a Barn
  8. How to Size an AC for an Elevator Machine Room
  9. How to Calculate L10 for Road Noise
  10. How to Calculate the Wind Turbine Size for a House
  11. How to Calculate Chimney Size for a Fireplace
  12. How to Calculate the Footing Size for a Covered Porch

Home Garden © https://www.98905.com