EN 61000-5-5-1996 en Electromagnetic Compatibility (EMC) Part 5 Installation and Mitigation Guidelines Section 5 Specification of Protective Devices for HEMP Conducted Disturbance .pdf
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1、STD-BSI BS EN bLUUD-5-5-ENGL L99b W Lb24bb9 0575279 822 BRITISH STANDARD Electromagnetic compatibility Part 5. Installation and mitigation guidelines Section 5. Specification of protective devices for HEMP conducted disturbance. Basic ERIC publication The European Standard EN 61W5-5 : 1996 has the s
2、tatus of a British standard ICs 33.100 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 61000-5-5 : 1996 IEC 1000-5-6 : 1996 BS EN 61000-5-6 : 1996 Committees responsible for this British Standard The preparation of this Britkh standard was entrusted to Technical Committe
3、e GEM10, Electromagnetic compatibiity, upon which the foliowing bodies were represented: This British Standard, having been prepared under the direction of the Eiectrotechnica,i Sector Board, was pubiished under the authority of the Standards Board and comes into effect on 16 December 1996 O BSI 199
4、6 Associon of Consuiting Scientists Association of Control Manufacturers (TACMA (BEAMA La) Association of Manufacturers of Domestic Eledrical Appliances Association of Manufacturers of Power Generating systems BEAMA Ltd. BEAMA Metering Association (BMA) British ndustzia Thick Associon British Lighti
5、ng Association for the Preparation of standards British Telecommunications pic Building Automation and Mains Signailing Association (BAMSA) Department of Health Department of Thde and Industry (Standards Policy Unit) Elecdxical Instaalaton Equipment Manufacturers Association Electricity Association
6、ERATechnology Ltd. Federation of the Electronics Industry GAhfBICA (BEMM Ltd.) Health and Safety Executive Induction and Dielectric Heating Manufacturers Association institution of Electrical Engineem International Asociation of Broadcasting Manufadmers Lighting Industry Federation Ltd. Mitishy of D
7、efence Motor Industry Research Association Nationai Air Tkafc Services National Physical Laboratory Power Supply Manufacturem Association (PSMA (BEAMA Ltd.) Professional Lighting and Sound Association Radiocommunications Agency Rotating Electrid Machines Association (BEAMA Ltd.) Society of British G
8、as Industries Society of Motor Manufacturers and Ilraders Limited Il.ansmission and Distribution Association (BEAMA Ltd.) Co-opted members 0 (BEAMA Ltd.) (BEAMA Ltd.) Amendments issued since publication The foiiowing BSI references reiate to the work on this standard Commime reference GEL210 J.)rat
9、for cornent 92/34648 DC ISBN O SS0 26381 9 STD.BS1 BS EN bL000-5-5-ENGL L77b = Lb29bb7 0575283 980 BS EN 6100066 : 1996 Contents page Committees responsible Inside fmnt cover National foreword ii Foreword 2 kxt of EN 61W 3 o BSI 1996 STD-BSI BS EN bL000-5-5-ENGL L77b Lb2Libb7 0575282 317 BS EN 61000
10、-5-6 : 1996 National foreword This British Standard has been prepared by Technical Commit.ee GEL410 and is the English anguage veision of EN 61000$-5 : 1996 Electmmagnek mpatrity MC) Part 5: Instauation and mitigation guidelines Section 5: Speccation of protective devices for HEMP c telecmmunkation,
11、 electmnh, lighting and cdour terms Part 1 Tm cmmn to power, telecommunications and elecmcs Group 09: 1991 Elec-tic compatibility BS 923 Guide on highvoltage testing techniques Part1:199oGeneral BS EN 60099 Surge arresters BS EN 600991 : 1994 Non-linear resistor type gapped surge arresters for a.c.
12、systems BS 3939 Gmphka symbols for - expulsion-type arresters: - non-linear resistor type arresters; - safety arresters: - thyristor diodes (under consideration). Voltage limiting devices: - metal-oxide varistor; - avalanche-junction transient voltage suppressors. Bandwidth limiting devices: - filte
13、rs; - protection circuits. Isolating devices (not dealt with): - optical links; - transformers. - optocouplers; Page 8 EN 61000-5-6 : 1996 Combination devices: - protection circuits; - safety arresters. Coaxial r.f.-circuit protectors: - coaxial holders; - stub-lines, resonators. 4.1.2 Fundamentals
14、on specifications of protective devices Each type of protection device as described above has its advantages and disadvantages with respect to a specific application. General comparisons between different types of devices may be misleading and shall not be made In specifications. Information about t
15、he switching time or delay time of a device shall not be given unless this time is largely independent of duldt and dgdt, and the fast action is not masked by the inductive voltage drop on the leads in practical applications. Protective devices are specified for independent worst case responso to fu
16、ndamental threat parameters like duldt, dYdt and critical waveforms. It is only by this principle that the great variety of threat events and possible combinations of threat parameters may be covered. Specifying the response to combined waveforms, containing several of the mentioned threat parameter
17、s in one pulse, would necessitate a large number of pulses with different combinations of parameters. On single-element protective devices like gas discharge tubes, metal-oxide varistors, and avalanche-junction transient voltage suppressors, the mentioned threat parameters do not, in practice, occur
18、 at the same time. The device will therefore respond independently to each of them, and the corresponding residual voltages will not be super- imposed. In combined devices with integrating properties like protection circuits containing filters, their response to high dlddt and d#dt may be superimpos
19、ed but will not lead to the highest residual vtiltage. In protection circuits, the power handling capability is usually concentrated in the primary protection element (gas discharge tube or powerful varistor). The precise voltage limiting action and the suppression of the high-frequency transients a
20、re achieved independently by interaction between the secondary protection element (capacitor, varistor or protective diode) and the longitudinal decoupling element (inductive impedance). In such a configuration, the responses to the specified impulse discharge current, and high dddt and dgdt may par
21、tially be superimposed. The influence of duldt and dridt depends on the insertion loss at the highest frequencies and is usually negligible. HEMP-relevant specifications may be verified only in an ideal measurement Set-up. In practical applications residual voltages may be much higher than specified
22、 because of the inductive voltage drop on the leads of the protection device and other imperfections of the Set-up. Voltage breakdown devices (see above) may create even higher duldt and dldt within an equipment than what would be expected from the HEMP. This may lead to excessive residual voltages
23、in poorly designed secondary protections. In combinations of primary and secondary protection elements, care should be taken to ensure the proper decoupling (power split-up) between the elements under all possible surge conditions. STD.BS1 BS EN bL000-5-5-ENGL 377b 3b2LibbS 0575293 32T Page 9 EN 610
24、00-6-6 : 1996 4.2 Gas discharge tubes Applies also to spark gap devices for protection of communication and signalling circuits, but not to valve, expulsion, or non-linear resistor type arresters. 4.2.1 Basic specifications Gas discharge tubes shall at least be specified for the following non-HEMP-r
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