Electrical insulation systems. Procedures for thermal evaluation - Specific requirements for general-purpose models. Wire-wound applicationsWhat is BS EN 61857 21 Procedures for thermal evaluation about? BS EN 61857 21 is a European standard that addresses a specific test object and or application with an associated test procedure. BS EN 61857 21 is a guide on a general consideration of the use of a general purpose model and a tall channel alternative model. BS EN 61857 21 provides a guideline for the evaluation of wire wound electrical insulation systems. In this guideline, specific

but with aggregate net heat inputs in excess of 70 kW

an antenna

the ISO/IEC 11179 series is a primary tool for specifying semantics

BS EN 3745-205 specifies a method to determine the longitudinal dimensional stability of the outer sheath/jacket (if present) and secondary coating or buffer of a fibre optic cable or fibre

an alternative method which can be considered to be equivalent

EN 9104‑002

This document defines the overall scope of ISO 12944 (all parts)

This standard does not address safety or CCF issues due to functional inter-dependencies and possible interferences or CCFs that may result from signal exchange or sharing between systems or sub-systems

such as corn or cotton derivatives

5 as being a supporting part of the frame document

fluoroelastomer sleeving for use in aircraft electrical systems at operating temperatures between -55 °C and 200 °C

in human medical practice