BS EN IEC 62040-2:2018

What is BS EN IEC 62040-2 – Uninterruptible power systems about? 

BS EN IEC 62040-2 is a European standard that discusses the electromagnetic compatibility (EMC) requirements for uninterruptible power systems (UPS). Uninterruptible power supplies (UPS) are power supplies that can switch over to a battery backup when power outages occur. 

BS EN IEC 62040-2 is a test product standard for electromagnetic compatibility (EMC) and applies to movable, stationary, fixed or built-in, pluggable and permanently connected UPS for use in low-voltage distribution systems with an environment being either residential, commercial, light industrial or industrial, which deliver output voltage with port voltages not exceeding 1 500 V DC or 1 000 V AC and which include an energy storage device. 

Note: BS EN IEC 62040-2 does not address EMC phenomena produced by loads connected to the UPS or situations created by any apparatus external to the UPS other than as described in the immunity requirements. BS EN IEC 62040-2 does not include: 

• Low-voltage DC power supply devices covered by IEC 61204 standards 
• Systems wherein the output voltage is derived from a rotating machine 

Who is BS EN IEC 62040-2 – Uninterruptible power systems for? 

BS EN IEC 62040-2 on uninterruptible power systems applies to: 

• Electronic engineer 
• Quality check personnel 

Why should you use BS EN IEC 62040-2 – Uninterruptible power systems? 

Electromagnetic compatibility or EMC means that a device is compatible with (i.e., no interference is caused by) its electromagnetic (EM) environment and it does not emit levels of EM energy that cause electromagnetic interference (EMI) in other devices in the vicinity. Uninterruptible power supplies (UPS) are power supplies that can switch over to a battery backup when power outages occur. 

BS EN IEC 62040-2 navigates you through the Subject of installing, operating and maintaining the UPS in the manner prescribed by the manufacturer, BS EN IEC 62040-2 defines emission limits, immunity levels, test methods and performance criteria for a complete UPS to comply with the essential EMC requirements necessary to avoid the UPS interfering with other apparatus, e.g., radio receivers, and to avoid the UPS being affected by external phenomena. 

BS EN IEC 62040-2 provides you with comprehensive information useful throughout the process of production. 

What’s changed since the last update? 

BS EN IEC 62040-2:2018 supersedes BS EN 62040-2:2006, which is withdrawn. It includes: 

• The inclusion of network port limits in Table 1, Table 2 and Annex C for the sake of consistency with other standards 
• A change of quasi-peak limit for category C3 UPS in Table 2 for the sake of consistency with other standards 
• A clarification in Table 4 about the performance criteria for immunity tests 
• A revision of some test configurations in Annex A.