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Vinil7 [7]
3 years ago
5

For an installation with a 150-kVA, 3-phase transformer, a 480-volt primary, and a 240-volt secondary, calculate the maximum sta

ndard size circuit breaker permitted for primary-only protection using Table 450.3(B), Note 1.
Engineering
1 answer:
kondor19780726 [428]3 years ago
7 0

Answer: The 500 kVA, 3-phase transformer in the image has a 12,470 volt primary. To size a fuse for the primary side, use the formula in the image as seen ...

Explanation:

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Explanation:

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3 0
3 years ago
What is the impedance of a 5μF capacitor at a frequency of 500Hz? What is the impedance of a60mH inductor at this frequency?
choli [55]

Answer:

1) 63.66 ohm

2) 188.49 ohm

Explanation:

Data provided in the question:

Part 1

Capacitance, C = 5μF = 5 × 10⁻⁶ F

Frequency = 500 Hz

Now,

Impedance = \frac{1}{2\times\pi\times f\times C}

or

Impedance = \frac{1}{2\times\pi\times500\times5\times10^{-6}}

or

Impedance = 63.66 ohm

Part 2

Inductance = 60 mH = 60 × 10⁻³ H

Frequency = 500 Hz

Now,

Impedance for an inductor = 2πfL

thus,

Impedance = 2 × π × 500 × 60 × 10⁻³

= 188.49 ohm

4 0
3 years ago
How much power do a capacitor and inductor dissipate? Assume the capacitor/inductor have no parasitic resistance (no resistor in
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Question about transformers and generators
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Answer:

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Explanation:

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