Inactive-Withdrawn Standard

IEEE 304-1977

IEEE Test Procedure for Evaluation and Classification of Insulation Systems for Direct-Current Machines

Insulation systems for direct-current machines are classified in accordance with their limiting temperatures as determined by test rather than by chemical composition. The intention is to classify according to the recognized A, B, F, and H categories by determining thermal capability in accordance with machine temperature-rise standards. This test procedure has been prepared to indicate accepted tests. It is applicable to insulation systems for use in usual service conditions. This standard does not cover special requirements such as for machines in gas atmospheres being subjected to strong chemicals, metal dusts, or submersion in liquids.

Sponsor Committee
PE/EM - Electric Machinery
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Status
Inactive-Withdrawn Standard
Board Approval
1976-09-09
History
Withdrawn:
2004-01-16
ANSI Approved:
1992-05-06
Published:
1977-09-08
Reaffirmed:
1991-09-26

Working Group Details

Society
IEEE Power and Energy Society
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Sponsor Committee
PE/EM - Electric Machinery
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No Active Projects
No Active Standards
No Superseded Standards
No Inactive-Withdrawn Standards
No Inactive-Reserved Standards
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