The 4.76-kV circuit breaker in Table 9.4 can be used for a rated fault current interruption of
Question:
The 4.76-kV circuit breaker in Table 9.4 can be used for a rated fault current interruption of 41 kA at a rated 4.76 kVLL system voltage. Determine the range of system voltage and interruption current it can be used for.
Table 9.4
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TABLE 9.4 Standard Ratings of Indoor Circuit Breaker in 4.76-38 kV Range Rated System Voltage kV₁ LLrms 4.76 4.76 4.76 8.25 15 15 15 38 Rated Continuous Current kArms 1.2 1.2, 2.0 1.2, 2.0, 3.0 1.2, 2.0 1.2, 2.0 1.2, 2.0 1.2, 2.0, 3.0 1.2, 2.0, 3.0 Rated Symmetrical Fault Current Interrupt kArms 8.8 29 41 33 18 28 37 21 Rated Symmetrical Fault Current Interrupt MVArms (within K-factor)a 72.5 240 340 470 470 730 960 1380
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According to Table 94 the 476kV circuit breaker can be used for a rated fault current interruption o...View the full answer
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Related Book For
Introduction To Electrical Power And Power Electronics
ISBN: 9781466556607
1st Edition
Authors: Mukund R. Patel
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