pts) 2. Consider the III curve shown below. 500 Voltage 1 Tolerance Applicable t

Question

pts) 2. Consider the III curve shown below. 500 Voltage 1 Tolerance Applicable to 120, 120/208, and 120/240 nominal voltages 140 120 100 80 110 70 40 0001c 0.lc 1c 10 100 001c 1ms 3ms 20ms 05s10s seady Disturbance Duration in cycles (c) and seconds (s) A circuit breaker used on a feeder with a fuse-saving strategy implemented can trip and reclose in 50 ms. A modification is made to the circuit breaker so it can now trip and reclose n 15 ms. Would you expect MAIFI to improve, get worse, or stay the same? Explain.

Explanation / Answer

Maifi is improved as the reclose time is low the interruption for customers is also low so the utility reliability increases .As maifi is one of the reliability factor of utility for customers it also improves

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