BS EN 61000-4-5:2014+A1:2017

What is BS EN 61000-4-5 - Electromagnetic compatibility about?  

BS EN 61000 is a series on Electromagnetic compatibility (EMC). Electromagnetic compatibility or EMC means that a device is compatible with (i.e., no interference is caused by) its electromagnetic environment and it does not emit levels of EM energy that cause electromagnetic interference (EMI) in other devices in the vicinity. BS EN 61000-4-5 relates to the immunity requirements, test methods, and range of recommended test levels for equipment about unidirectional surges caused by over-voltages from switching and lightning transients. Several test levels are defined which relate to different environments and installation conditions. These requirements are developed for and are applicable to electrical and electronic equipment. 

The object of BS EN 61000-4-5 is to establish a common reference for evaluating the immunity of electrical and electronic equipment when subjected to surges. The test method documented in BS EN 61000-4-5 describes a consistent method to assess the immunity of an equipment or system against a defined phenomenon. BS EN 61000-4-5 defines: 

• A range of test levels 
• Test equipment 
• Test setups 
• Test procedures 

Who is BS EN 61000-4-5 - Electromagnetic compatibility for? 

BS EN 61000-4-5 on Electromagnetic compatibility is useful for: 

• Telecommunication equipment manufacturers 
• Design engineers  
• Quality control personnel 
• Research and development facilities 

Why should you use BS EN 61000-4-5 - Electromagnetic compatibility?  

BS EN 61000-4-5 discusses the surge immunity test for the measurement and testing of Electromagnetic compatibility of a system or a component. The objective of this test is to evaluate the performance of the equipment under test under high-energy disturbances on the power and interconnection lines, the disturbances being caused by over-voltages from switching and lightning transients. 

The DC. /DC converter problem is related to the switching of the converter which produces a voltage drop at the decoupling inductors on one hand and oscillations produced by the EUT impedance in combination with the source on the other hand. Measurements are performed as described in BS EN 61000-4-5 using different brands of CDNs with a device known to show that problem as a EUT. The result shows different oscillations and signals forms of the voltage at the EUT for different CDNs. According to the outcome, the use of a CDN with a higher current rating (i.e., smaller decoupling inductivity) can solve the problem. 

The task of the described laboratory test is to find the reaction of the equipment under test (EUT) under specified operational conditions to surge voltages caused by switching and lightning effects. Using BS EN 61000-4-5 you understand the immunity requirements, test methods, and range of recommended test levels for equipment with regard to unidirectional surges caused by over-voltages from switching and lightning transients.   

What’s changed since the last update?  

BS EN 61000-4-5:2014+A1:2017 supersedes BS EN 61000-4-5:2014. BS EN 61000-4-5:2014+A1:2017 includes some technical changes with respect to BS EN 61000-4-5:2014. These include: 

• New Annex E on mathematical modelling of surge waveforms 
• New Annex F on measurement uncertainty 
• New Annex G on the method of calibration of impulse measuring systems 
• New Annex H on coupling/decoupling surges to lines rated above 200 A 
• Moreover, while surge test for ports connected to outside telecommunication lines was addressed in 6.2 of the second edition (IEC 61000-4-5:2005), in this third edition (IEC 61000-4-5:2014) the normative Annex A is fully dedicated to this topic. It gives the specifications of the 10/700 μs combined wave generator