BS EN 61857-31:2017

What is BS EN 61857-31- Thermal evaluation of EIS about? 

BS EN 61857-31 is a European Standard on electrical insulation systems (EIS).  

BS EN 61857-31 is the 31st part of the IEC 61857 series that establishes an EIS evaluation for applications with a designed life of 5 000 h or less. This test method follows the procedures of IEC 60505 and is modified based on the range of designed life. 

Who is BS EN 61857-31 - Thermal evaluation of EIS for? 

BS EN 61857-31 on EIS is relevant to: 

• EIS manufacturers  
• Automotive industry 
• Electrical industry  
• Accredited laboratories  
• Electrical engineers  

Why should you use BS EN 61857-31 - Thermal evaluation of electrical insulation systems? 

An electrical insulation system is comprised of a unique combination of materials that have been verified for chemical compatibility when used at certain maximum temperatures. In this regard, the thermal evaluation of EIS is critical to determine the insulation capabilities of the materials.  

BS EN 61857-31 covers best industry EIS evaluation, and provides guidance on three tests based on designed life to determine the thermal endurance and durability of the EIS. Thus, with minimized risk of breakdowns, you can maintain overall integrity and operational efficiency of EIS.