Ground grid integrity testing using megger model GTS-300 as implemented by the National Grid orporation of the Philippines-CaLamba.

Date

10-2012

Degree

Bachelor of Science in Electrical Engineering

Major Course

Major in Power Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Catriz, Roderick L.

Committee Member

Agno, Karen Christian C.

Abstract

Ground grid integrity testing is the process of checking the condition of the ground grid under a substation. National Grid Corporation of the Philippines-Calamba uses Megger Model GTS-300 in testing the integrity of its substation ground grids. The process of testing and evaluating the integrity of ground grids using GTS-300 as implemented by NGCP-Calamba conforms to the IEEE 80-2000 standard. The test involves an injection of substantial current, 300A, from a reference ground to the test ground. Parameters needed in evaluating the integrity between points of interest (grounding conductors of reference and test) are voltage drop between grounding conductors, voltage drop between the output leads used in the test, length between the grounding conductors, current returning to the test equipment and the current path to where the injected current flows. Discontinuity in the grounding conductor or substation ground grid between points results in a Not Good remark. A Good remark will be given if the voltage drop per length does not exceed 0.03 V/ft and current returning to the test equipment is substantial (200A for singly grounded and 150A for multi grounded equipment). Sample test and calculation are available in this field practice manuscript. The test was conducted at Old Sucat Substation 115kV switchyard.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology

Call Number

Thesis

Document Type

Thesis

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