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IEC/TR 60890

A Method of Temperature-rise Assessment by Extrapolation for Partially Type-Tested Assemblies (PTTA) of Low-Voltage Switchgear and Controlgear

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Organization: IEC
Publication Date: 1 January 1987
Status: inactive
Page Count: 66
ICS Code (Plugs, socket-outlets, couplers): 29.120.30
scope:

The following method is applicable to enclosed PTTA or partitioned sections of PTTA without forced ventilation.

Notes 1. - The influence of the materials and wall thicknesses usually used for enclosures are negligible on the steady state temperatures. The method is therefore applicable to enclosures made of sheet steel, sheet aluminium, cast iron, insulating material and the like.

2. - For open-type and dead-front FTTA, no temperature-rise assessment is needed if it is obvious that no excessive air temperatures are likely to arise.

Document History

May 1, 2014
A method of temperature-rise verification of low-voltage switchgear and controlgear assemblies by calculation
This Technical Report specifies a method of temperature-rise verification of low-voltage switchgear and controlgear ASSEMBLIES by calculation. The method is applicable to enclosed ASSEMBLIES or...
IEC/TR 60890
January 1, 1987
A Method of Temperature-rise Assessment by Extrapolation for Partially Type-Tested Assemblies (PTTA) of Low-Voltage Switchgear and Controlgear
The following method is applicable to enclosed PTTA or partitioned sections of PTTA without forced ventilation. Notes 1. - The influence of the materials and wall thicknesses usually used for...

References

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