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DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE

Overview

This part of IEC 60939 covers passive filters used to attenuate unwanted radio-frequency signals (such as noise or interference) generated from electromagnetic sources. Both single and multi-channel filters within one enclosure or which are built on a printed circuit board forming a compact entity are included within the scope of this specification. Filters constructed of capacitive elements where the inductance is inherent in the construction of the filter are within the scope of this specification. Similarly, filters constructed of inductive elements where the capacitance is inherent in the construction of the filter are also within the scope of this specification. It is up to the manufacturer to state whether a given component is to be designed as a capacitor, an inductor or a filter. Filters can include also other components like resistors and/or varistors or similar components. This specification applies to passive filter units for electromagnetic interference suppression for which safety tests are appropriate. This implies that filters specified according to this specification will either be connected to mains supplies, necessarily applying the prescribed tests, or used in other circuit positions where the equipment specification prescribes that some or all of these safety tests are required. This specification applies to passive filter units, which will be connected to the mains supply or connected to other voltage sources (d.c. or a.c.) with a nominal voltage not exceeding 1 000 V a.c., with a nominal frequency not exceeding 400 Hz, or 1 500 V d.c. This document applies to appliance filters, but not to facility filters, cord connected filters, or direct plug-in filters. These other filters are covered by a different sectional specification. This document covers: terms, general requirements, preferred ratings and characteristics, test plan for safety tests, test and measurement procedures, optional tests (for performance evaluation only), calculation of leakage current, sampling plan for safety requirements only, test plan for safety tests, circuit for surge voltage test, circuit for endurance test, and description of construction. The standard differs from DIN EN 60939-3 (VDE 0565-3-4):2016-09 and DIN EN 60939-3 Corrigendum 1 (VDE 0565-3-4 Corrigendum 1):2018-11 as follows: a) clauses for safety and performance tests separated; b) note added on the use of different X capacitors to bridge the base insulation in three-phase filters; c) properties and conditions for replacing X and Y capacitors are now described in a separate subclause 4.1; d) tables on creepage distances and clearances updated and brought into line with the latest versions of IEC 60938-2 and IEC 60664-1; e) voltage measurements permitted for inductance measurements (7.3); f) requirements for marking depending on the remaining energy after disconnection added; g) content from CTL DSH 2044:2016 for temperature tests for IEC filters added; h) note added on test specimens required for safety tests due to temperature increase; i) capacitor indices in Annex A changed to avoid confusion between index name and capacitor class; j) tests from group 1A moved to 2. Test specimens in group 1A shall now be submitted without encapsulation; k) all parts of the document have been revised based on ISO/IEC Directives, Part 2:2021 and harmonization with other documents of a similar nature. Annex X contains all cross-references to changes in clause numbers. By applying this document, manufacturers and users can increase investment security, testing laboratories and manufacturers can obtain defined information for testing, and product compatibility between manufacturers can be improved.

Document: references other documents

Responsible national committee

DKE/K 623 - Funk-Entstörmittel