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IEEE AIEE 1B-1944

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AIEE Report on Guiding Principles for the Specification of Service Conditions in Electrical Standards

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New IEEE Standard - Superseded. In the various standards there will be found a number of different situations regarding Usual Service Conditions. The following three are typical. 1. The group where the maximum ambient temper­ature is specified. The Standards for Bushings, Fuses, Lightning Arresters, Protector Tubes and Potential Devices where 40 C ambient is used and Marine Equipment where 50 C ambient is used are typical of this group. 2. The group where both the maximum and daily average temperatures of the cooling medium are specified. Standards for Transformers, Regulators and Neutral Grounding Devices are typical of this group. 3. The group where a higher ambient temperature is specified for silver contacts than for copper con­tacts. Standards for Circuit Breakers, Air Switches and Switchgear Assemblies are typical of this group. It is suggested that a selection of one of the fol­lowing groups can be made for the statement of Usual Service Conditions in most of the standards for specific equipment.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number 1B
Publication Date Nov. 30, 1943
Language en - English
Page Count 4
Revision Level
Supercedes
Committee
Publish Date Document Id Type View
Nov. 30, 1943 1B-1944 Revision