A LOW COST MICROCONTROLLER-BASED FREQUENCY MEASUREMENT RETROFIT FOR GENERATORS

Publication Date : 01/02/2011

Author(s) :

ADAMU, S.S..

Volume/Issue :

Volume 6

Issue 1

(02 - 2011)

Abstract :

A low cost digital frequency meter was implemented using a microcontroller to replace the moving coil analogue types. The retrofitted digital meter has the additional benefit of shutting down the generator in case of over or under frequency after a fixed delay; a feature not usually incorporated in analog frequency meters. The developed meter measures frequency in the range of 0 to 99 Hz, with an accuracy of ± 1 digit, which is acceptable in comparison with commercial analogue frequency meters usually found on electric generators. Due to flexibility inherent in micro-based designs, other operating features may be easily added. These include: line voltage and current measurements, power and power factor measurements, and other abnormal conditions monitoring and alarms.

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