IEC TR 60890:1987
A Method of Temperature-rise Assessment by Extrapolation for Partially Type-Tested Assemblies (PTTA) of Low-Voltage Switchgear and Controlgear (Edition 1.0; Amendment 1: 02-1995)

Standard No.

IEC TR 60890:1987

Release Date

1987

Published By

IEC - International Electrotechnical Commission

Status

Be replaced

Replace By

IEC TR 60890:1987/AMD1:1995

Latest

IEC TR 60890:2022 RLV

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.

IEC TR 60890:1987 history

• 0000 IEC TR 60890:2022 RLV
• 2014 IEC TR 60890:2014 A method of temperature-rise verification of low-voltage switchgear and controlgear assemblies by calculation
• 1970 IEC TR 60890:1987/AMD1:1995 Amendment 1 - A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear
• 1987 IEC TR 60890:1987 A Method of Temperature-rise Assessment by Extrapolation for Partially Type-Tested Assemblies (PTTA) of Low-Voltage Switchgear and Controlgear (Edition 1.0; Amendment 1: 02-1995)