Coordination of protective devices using the automatic circuit recloser done by MERALCO
Date
10-2012
Degree
Bachelor of Science in Electrical Engineering
College
College of Engineering and Agro-Industrial Technology (CEAT)
Adviser/Committee Chair
Dulce, Elvin D.
Committee Member
Agno, Karen Christian C. Marqueses, Raymond A. Catriz, Roderick L.
Abstract
The field study discusses the coordination of protective devices using the automatic circuit recloser. Recloser is a self-contained device with the necessary intelligence to sense an over current condition, interrupt current flow and recloses automatically, after a predetermined time delay, to re-energize the line. Recloser is set to be coordinated with the substation relay/breaker and to the down line protective devices, namely sectionalizer fuse cutouts. The field study shows the basic considerations in coordinating protective devices with respect to the recloser. Fuse cutouts that are coordinated with a recloser are called as fuse saving wherein the recloser must trip first to give chance for the fault to be temporary, but once the recloser was not able to clear the fault after the first tripping, the fuse will blow-out, isolating the faulted region. While fuse cutouts that are not coordinated with the recloser are called as fuse blowing. Moreover, sectionalizer does not interrupt fault current but counts the fault interrupting operation of recloser. Lastly, recloser must be coordinated with the substation relay/breaker to prevent frequent shutdown of the system. Recloser must operate first before substation relay/breaker as long as the fault current is less than the instantaneous setting and the recloser trippings does not exceed then set number of shots to lockout.
Language
English
Location
UPLB College of Engineering and Agro-Industrial Technology
Call Number
Thesis
Recommended Citation
Tolentino, Jennifer L., "Coordination of protective devices using the automatic circuit recloser done by MERALCO" (2012). Undergraduate Theses. 395.
https://www.ukdr.uplb.edu.ph/etd-undergrad/395
Document Type
Thesis
