BS EN 62317-6:2016 pdf free.Ferrite cores- Dimensions ETD-cores for use in power supplies.
BS EN 62317-6 This part of IEC 62317 specifies the dimensions that are of importance for mechanicalinterchangeability for ETD-cores made of ferrite,the essential dimensions of coil formers tobe used with them,and the effective parameter values to be used in calculations involvingthem.
The use of “derived” standards which give more detailed specifications of component partswhile still permitting compliance with this standard is discussed in Annex A, which alsocontains an example of a derived standard for coil formers.
The following documents, in whole or in part, are normatively referenced in this document andare indispensable for its application.For dated references, only the edition cited applies. Forundated’references,the ‘latest edition of the referenced document(including anyamendments) applies.
Compliance with the following requirements ensures the mechanical interchangeability ofcomplete assemblies and coil formers.
The principal dimensions of ETD-cores shall be as given in Figure 1 and Table 1.
The dimensions of the cores may be checked by means of gauges.By way of example，apossible standard for these gauges is given in Annex B. In order to facilitate production it maybe necessary to use gauges having dimensions differing from those given in Annex B,although no relaxation of the requirements for the dimensions of the cores given in Table 1 ispermitted.
These shall be as shown in Figure 3, in which the base is viewed in the mounting direction, i.e.from the upper side of the printed wiring board.Coil former terminations (pins) shall be accepted by a gauge having 1,2 mm holes on a trueposition.
Where a coil former is fitted with termination pins conforming to a 2,50 mm module, it shall beclearly and indelibly marked with the letter m, in such a position that it can readily be seen inthe completed component.
According to their sizes and respective weights,it is recommended that two of the largestcores (ETD 54 and ETD 59) be fixed on the printed board by means of screws located at twoopposite sides of their coil formers.
Concerning smaller sizes such as ETD 19 and ETD 24, no mounting assemblies are defined.lt is recommended that the two cores be fixed by glue or adhesive tape.BS EN 62317-6 pdf download.