Usual Temperature and Altitude Service Conditions-Equipment conforming to this Standard shall be suitable for operation at its standard rating, provided that: (a) The temperature of the cooling air (ambient temperature) does not exceed 40C if the equipment has copper-to-copper contacts or equivalent. (b) The temperature of the cooling air (ambient temperature) does not exceed 55C if the equipment has all contacts silver surfaced or equivalent, and in addition has all conducting joints, including terminal connections, either (1) Separately held mechanically, and either soldered or silver surfaced, or (2) Brazed, welded or silver soldered and provided that such operation does not result in temperatures in excess of 90C for class O, 105C for class A or 130C for class ? insulations. ( c ) The altitude does not exceed 3300 feet (1000 meters).
- Sponsor Committee
- PE/SWG - Switchgear
Learn More About PE/SWG - Switchgear - Status
- Inactive-Withdrawn Standard
- History
-
- Withdrawn:
- 1991-12-05
- ANSI Approved:
- 1963-12-31
- Published:
- 1962-12-01
- Reaffirmed:
- 1977-12-15
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More About IEEE Power and Energy Society - Sponsor Committee
- PE/SWG - Switchgear
Learn More About PE/SWG - Switchgear
Other Activities From This Working Group
Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.
No Active Projects
Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.
No Active Standards
These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.
No Superseded Standards
These standards have been removed from active status through a ballot where the standard is made inactive as a consensus decision of a balloting group.
No Inactive-Withdrawn Standards
These standards are removed from active status through an administrative process for standards that have not undergone a revision process within 10 years.
No Inactive-Reserved Standards