Electromagnetic compatibility EMC - Part Limits - Limitation of emission of harmonic currents in low-voltage power supply systems for equipment with rated current greater than 16 A. Electromagnetic compatibility EMC - Part Limits - Limitation of voltage fluctuations and flicker in low-voltage power supply systems for equipment with rated current greater than 75 A. Electromagnetic compatibility EMC - Part 3: Limits - Section 8: Signalling on low-voltage electrical installations - Emission levels, frequency bands and electromagnetic disturbance levels. Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement 0, MHz. Electromagnetic compatibility - Requirements for household appliances, electric tools and similar apparatus - Part 1: Emission 0, MHz and clicks. Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement 0, MHz.
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Do you need a multi-user copy? Our prices are in Swiss francs CHF. We accept all major credit cards American Express, Mastercard and Visa , PayPal and bank transfers as form of payment. IEC deals with the limitation of harmonic currents injected into the public supply system.
It specifies limits of harmonic components of the input current which can be produced by equipment tested under specified conditions. Arc welding equipment which is not professional equipment, with a rated input current up to and including 16 A per phase, is included in this document.
Arc welding equipment intended for professional use, as specified in IEC , is excluded from this document and can be subject to installation restrictions as indicated in IEC The tests according to this document are type tests. For systems with nominal voltages less than but not equal to V line-to-neutral , the limits have not yet been considered. This fifth edition cancels and replaces the fourth edition published in This edition constitutes a technical revision.
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With the emergence of large scale distributed electronic devices, first the radio with electronic valves, and later TV and Personal Computers, there has been a fundamental problem with mains pollution by harmonic currents. All mentioned electronic apparatus need a smoothed DC voltage as supply. A simple and cheap means of getting low ripple is to use a relatively inexpensive electrolytic capacitor with high capacitance values, direct coupled after the mains voltage rectifier. Smoothing the DC voltage can also be effected by inductors , but these are much more expensive, and have relatively large size, and large weight, but would generate much less harmonic currents.
A Practical Guide for EN 61000-3-2 - Limits for harmonic current emissions