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Category > Computer Science Posted 27 Jul 2017 My Price 12.00

maximum fault currents


Repeat Example 10.4 for the following system data. Coordinate the relays for the maximum fault currents.

 

EXAMPLE 10.4

Coordinating time-delay overcurrent relays in a radial system

Data for the 60-Hz radial system of Figure 10.16 are given in Tables 10.3, 10.4, and 10.5. Select current tap settings (TSs) and time-dial settings (TDSs)

to protect the system from faults. Assume three CO-8 relays for each breaker, one for each phase, with a 0.3-second coordination time interval. The relays for each breaker are connected as shown in Figure 10.17, so that all three phases of the breaker open when a fault is detected on any one phase. Assume

a 34.5-kV (line-to-line) voltage at all buses during normal operation. Also, future load growth is included in Table 10.3, such that maximum loads over the operating life of the radial system are given in this table.

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Maurice Tutor
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Status NEW Posted 27 Jul 2017 10:07 AM My Price 12.00

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