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pi filter

   Also found in: Wikipedia 0.02 sec.
pi filter [′pī ‚fil·tər]
(electronics)
A filter that has a series element and two parallel elements connected in the shape of the Greek letter pi (π).


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According to the information from ABB [9], static excitation system UNITROL5000 has the following functions: * Voltage regulator with PID filter (AUTO operating mode); * Field current regulator with PI filter (MAN operating mode); * Reactive load and/or active load droop/compensation; * Limiters for: * Maximum and minimum field current * Maximum stator current (lead/lag) * P/Q under excitation * Voltage-per-hertz characteristics.
The Mini series is available in both LC and PI filter configurations from 1 to 13 positions.
All models feature input pi filters, input under voltage lockout, output current limiting, and short-circuit protection.
 
 
 
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