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what is the main purpose of line PT and bus PT?
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Answer Posted / ramji
Line PT has metering and Protection Cores. Its main use is
to mointor the Line Voltage parameters and is widely used
in protecting Lines in case of Faults occuring due to Phase
to phase faults and phase to earth faults which comes under
its review.
sometimes it has a core for meeting synch with respect
others incase the line breaker opens
Bus pt has metering core and protection core for BUS BAR
protn which mointors the faults in all the buses with
respect to that in a particular substation only
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