IEEE C57.95 1988

$30.88

IEEE Guide for Loading Liquid-Immersed Step-Voltage and Induction-Voltage Regulators

Published By	Publication Date	Number of Pages
IEEE	1988	32

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Description

New IEEE Standard – Inactive – Withdrawn. This guide covers general recommendations for loading mineral oil-immersed, 55C rise, step-voltage and induction-voltage regulators manufactured in accordance with ANSI/IEEE C57.15-1986. Some users may choose to load regulators as though rated for 65C rise, although this operation is not recognized by ANSI/IEEE C57.15-1986. This guide treats the loss of life to be anticipated under such operation. Loading recommendations in tabular form are contained in this guide. These recommendations cover a wide range of ambient conditions and loss of life. The method and equations used for calculation of the tables are given. This guide is only applicable for regulators having inherent capability to permit the loadings covered.

PDF Catalog

PDF Pages	PDF Title
11	Scope and References 1.1 Scope 1.2 References General 2.1 Rated kVA
12	2.2 Limitations Load
13	2.3 Insulation Aging 2.4 Regulator Life Expectancy Reduction Factors for Altitudes Greater Than 1000 m (3300 ft)
14	Life Expectancy Curve
15	Loading Recommendations Continuous Loading with Normal Life Expectancy 3.2 Restricted Regulation 3.3 Top-Oil Temperature
16	Loading with Reduced Voltages Percent Relative Loss of Life in 55 “C Rise Insulation System Percent Relative Loss of Life in 65 “C Rise Insulation System
17	3.5 Short-Time Loading Determination of Temperature and Loss of Life 4.1 General 4.2 Load Cycles Assumed 55 “C Rise Regulator Design Characteristics at Rated Load Loading with Reduced Regulation
18	Life Expectancy Actual Load Cycle
19	Calculation of Temperature and Loss of Life General Assumed Load Cycle
20	Load Before Peak Load = 50% of Nameplate Rating
21	Load Before Peak Load = 70% of Nameplate Rating
30	Equation Corrections
31	Method Used for Computer Calculation of Loading Capability Tables