Free Download Iec 62305-1 Pdf

According to IEC 62305-1, a multiple stroke on average consists of three to four strokes. The typical time intervals between them are about 50 ms. A multiple impulse current generator allows to simulate such multiple strokes in the laboratory.

2010: IEC 62305 Series references IEC 61643-1 and takes the Hasse lightning parameters unchanged from IEC 61312-1. Here are only some of those mentions in 62305-1 but they are repeated in many ways all through the 62305 series.

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REFERENCES: This standard cites the 2 Berger/Anderson CIGRE Electra articles in hopes they would provide some authority for the 62305-1's 10/350 waveform. As shown on the CIGRE pages of this web, the CIGRE Technical Brochure 549 invalidates any legitimacy the 10/350 waveform was ever thought to have had.

IEC 62305-1 contains five annexes. Each approaches the subject of lightning parameters in its own way. Together they seek to persuade the reader that all five of the Hasse lightning parameters must be used, and that they must all be used together. The 5 parameters can be seen highlighted in green in the 62305-1 chart to the right. Move your curser over it and you'll see the actual source of those parameters: the 1982 Hasse chart.

Annex A re-introduces the five Hasse parameters. See Section A.3.2.

Annex B drives home the importance of the duration factor: 350 microseconds is a MUST.

Annex C reiterates these parameters (just in case you were sleeping through Annex A and B) and reminds you they must all be present in a single 10/350 impulse.

Annex D repeats the necessity of employing all 5 of the 10/350 parameters in a single impulse, but stresses that the two main parameters to be considered are "the maximum value and the duration of the impulse current."

Annex E instructs you once more (just in case there remained any lurking doubt) that the ONLY SPDs allowed to protect any service entrances to a building were those tested with the impulse peak current and 10/350 waveform of the Class I test. LIGHTNING PROTECTION LEVELS --The big broken promise: A lightning protection level according to IEC 62305-1 (3.39) is a set of lightning current parameters which is not supposed to be exceeded in naturallyoccurring lightning. Which lightning protection level you choose determines the design of your protection measures. Section 8 of this standard warns us that the entire 62305 series hangs or falls on its system of LPLs (lightning protection levels.)

The third chapter discusses fitting a particular model called the p-peaked Analytically Extended Function (AEF) to data taken either from a standard for electromagnetic compatibility or experimental measurements. More specifically the AEF will be fitted to discharge currents from the IEC 62305-1 and IEC 61000-4-2 standards for lightning protection and electrostatic discharge immunity as well as some experimentally measured data of similar phenomena. be457b7860