Comparative analysis of mineral oil and envirotemp FR3 as coolant for 25 kVA single-phase distribution transformer designed by First Philec Inc.

Date

6-2016

Degree

Bachelor of Science in Electrical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Rodolfo A. Aguirre, Jr.,

Restrictions

Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

The study compared the effect of mineral oil and Envirotemp FR3 as coolant to the temperature and design of 25 kVa single-phase, oil-immersed distribution transformer with 7620V primary voltage and 120/240V secondary voltage. Two transformer designs were considered in the study NA 521 and AR 521. Temperature rise test was done to NA 521 with mineral oil and FR3. Results from the tests were used to relate the effects of coolant to the resistance and average winding rise of the transformer windings. Based on the test, FR3 attains higher top oil rise and effective oil rise than mineral oil. Higher temperature rise in this study means that it acquires and dissipates heat faster, thus FR3 gives lower average winding rise and lower resistance. Giving lower winding temperature extends transformer life span therefore, this kind of transformer, FR3 is considered as better coolant. Comparison of electrical parameters based on designs was done by comparing the design of AR 521 with mineral oil and FR3. The flux density, %impedance, winding resistance, current density, losses and % efficiency of the designs were compared. It was found out that different coolant gives minimal difference on tuese parameters for the kind of transformer used in the study.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993 2016 E64 /A44

Document Type

Thesis

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