Synchronization

Hi.

We have a unit connected system. In a unit connected system, generator is connected to transformer then to 220kv circuit breaker.

1. The c.b. is called a synchronization breaker? i.e. closed at that particular instant?!

How syncrhonization will be analyzed here?

Circuit Breaker Fail Protection.

Hi,

A circuit breaker is designed to operate on fault, when the sensed current is above the preset current on fault conditions. How is the circuit breaker fail safe protection system designed? Also, how is autoreclosing made possible?

sks

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In stress analysis, the no. of thermal load cycles are generally considered 7000 (so that the corresponding f=1). This is true for a plant life of 20Years.
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Anybody of

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Design Conditions are normal.

Pl. explain this in brief.

Many Thanks!

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