Low-voltage switchgear and controlgear assemblies - Part 1: General rules - Supplement 2: A method of temperature-rise verification of low-voltage switchgear and controlgear assemblies by calculation (IEC TR 60890:2022)
Abstract
This document specifies a method of air temperature-rise calculation inside enclosures for low-voltage switchgear and controlgear assemblies or similar products in accordance with their respective standard. The method is primarily applicable to enclosed assemblies or partitioned sections of assemblies without forced ventilation. However, some technical guidance to adapt it for the use of forced ventilation is given in this document. The results obtained by using this method are directly influenced by the accuracy of the evaluation of power losses used as inputs to perform the thermal calculations.
Begin
2024-08-01
Planned document number
DIN EN IEC 61439-1 Beiblatt 2
Project number
02232475
Responsible national committee
DKE/UK 431.1 - Niederspannungs-Schaltgerätekombinationen
