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Answer Posted / hirak subhra majumder
In Several sub-stations and power houses a special type of
installations is applied i.e. generally O/C relay for B and
R phase and Earth fault relay for Y phase. From there the
three trip connections are coming out and is connected to
the master trip coil. Now this relay output is connected to
the circuit breaker. Thus the other relays works here as
slave(Not mandatory) and the later one as master controlling
the operation of the circuit breaker.
| Is This Answer Correct ? | 18 Yes | 3 No |
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54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?
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