EN 50550:2011
(Main)Power frequency overvoltage protective device for household and similar applications (POP)
Power frequency overvoltage protective device for household and similar applications (POP)
This European Standard applies to power frequency overvoltage protection devices (hereafter referred to as “POP”) for household and similar uses, with a rated frequency of 50 Hz, a rated voltage 230 V a.c. (between phase and neutral), intended to be used in combination with a main protective device being either a CB in compliance with EN 60898 1 or EN 60898 2, a RCCB in compliance with EN 61008 1 or a RCBO in compliance with EN 61009 1. NOTE 1 Requirements for POPs in combination with switching devices other than a main protective device, or a POP integrated in a MPD, are under consideration. NOTE 2 Requirements for POP with functional earth connection regarding temporary overvoltage withstand are under consideration. NOTE 3 A POP is not a protective device to be used for automatic disconnection of the supply in the meaning of HD 60364 4 41. They are intended for use in an environment with pollution degree 2 and overvoltage category III. They can be designed for factory assembly or for assembly on site. These devices are intended to mitigate the effects of power frequency overvoltages between phase and neutral conductor (e.g. caused by loss of neutral conductor in the three phase supply upstream the POP) for downstream equipment by actuating the main protective device when an overvoltage between phase and neutral is detected. NOTE 4 To mitigate means in this context that the POP will provide protection in most cases of power frequency overvoltages. NOTE 5 Protection in case of overvoltage between phases is under consideration. In case of phase to phase electrical supply system with rated voltage between phases 230 V a.c. and no neutral conductor, one line monitored POP in compliance to this standard can be used according to manufacturer’s instruction. The POP does not impair the protective function of the main protective device. This European Standard does not apply for protection against common mode over voltages. This European Standard does not apply to surge protective devices. This European Standard states: – the definitions of terms used for POP (Clause 3); – the classification of POP (Clause 4); – the characteristics of POP (Clause 5); – the preferred values of the operating and influencing quantities (Clause 5); – the marking and information to be provided for POP (Clause 6); – the standard conditions for installation and operation in service (Clause 7); – the requirements for construction and operation (Clause 8); – the list of minimum requirements to be tested (Clause 9).
Schutzeinrichtung gegen netzfrequente Überspannungen für Hausinstallationen und für ähnliche Anwendungen
Dispositif de protection contre les surtensions à fréquence industrielle pour les applications domestiques et analogues
Močnostna frekvenčna prenapetostna zaščitna naprava za gospodinjsko in podobno uporabo (POP)
Ta evropski standard velja za močnostne frekvenčne prenapetostne zaščitne naprave (v nadaljevanju »POP«) za gospodinjsko in podobno uporabo, z ocenjeno frekvenco 50 Hz, ocenjeno napetost 230 V izmeničnega toka (med fazo in nevtralo), za uporabo v kombinaciji z glavno zaščitno napravo, ki je ali CB v skladu z EN 60898-1 ali 60898-2, RCCB v skladu z EN 61008-1 ali RCBO v skladu z EN 61009-1.
OPOMBA 1: Zahteve za POP v kombinaciji s preklopnimi napravami, ki niso glavne zaščitne naprave ali POP, vgrajene v MPD, so v obravnavi.
OPOMBA 2: Zahteve za POP z delujočo ozemljitveno povezavo glede upiranja začasni prenapetosti se obravnavajo.
OPOMBA 3: POP ni zaščitena naprava za uporabo pri avtomatskem odklopu napajanja v pomenu HD 60364-4-41.
Namenjene so uporabi v okolju s stopnjo onesnaženosti 2 in prenapetostni kategoriji III.
Lahko so načrtovane za tovarniško sestavo ali za sestavo na lokaciji. Te naprave blažijo učinke močnosti frekvenčnih prenapetosti med faznim prevodnikom in nevtralnim prevodnikom (npr. povzročeno zaradi izgube nevtralnega prevodnika v trifaznem napajanju proti toku POP) za naprave v smeri toka z aktivacijo glavne zaščitne naprave, kadar je zaznana prenapetost med fazo in nevtralo.
OPOMBA 4: Blaženje s tem v zvezi pomeni, da POP zagotavlja zaščito v večini primerov močnostnih frekvenčnih prenapetosti.
OPOMBA 5: Zaščita v primeru prenapetosti med fazami se obravnava. V primeru električnega napajalnega sistema faza – faza z ocenjeno napetostjo 230 V izmeničnega toka in brez nevtralnega prevodnika se enolinijsko nadzorovana POP v skladu s tem standardom lahko uporablja v skladu s proizvajalčevimi navodili.
POP ne kvari zaščitne funkcije glavne zaščitne naprave.
Ta mednarodni standard ne velja za zaščito pred splošnim načinom prenapetosti.
Ta evropski standard ne velja za prenapetostne zaščitne naprave.
Ta evropski standard navaja:
– definicije izrazov, uporabljenih za POP (klavzula 3),
– klasifikacijo POP (klavzula 4),
– značilnosti POP (klavzula 5),
– prednostne vrednosti delovanja in vplivne količine (klavzula 5),
– označevanje in informacije, ki morajo biti priskrbljeni za POP (klavzula 6),
– standardne pogoje za inštalacijo in delovanje med uporabo (klavzula 7),
– zahteve za gradnjo in delovanje (klavzula 8),
– seznam minimalnih zahtev, ki jih je treba preskusiti(klavzula 9).
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2011
0RþQRVWQDIUHNYHQþQDSUHQDSHWRVWQD]DãþLWQDQDSUDYD]DJRVSRGLQMVNRLQ
SRGREQRXSRUDER 323
Power frequency overvoltage protective device for household and similar applications
(POP)
Schutzeinrichtung gegen netzfrequente Überspannungen für Hausinstallationen und für
ähnliche Anwendungen
Dispositif de protection contre les surtensions à fréquence industrielle pour les
applications domestiques et analogues
Ta slovenski standard je istoveten z: EN 50550:2011
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 50550
NORME EUROPÉENNE
February 2011
EUROPÄISCHE NORM
ICS 29.120.50
English version
Power frequency overvoltage protective device for household and similar
applications (POP)
Dispositif de protection contre les Schutzeinrichtung gegen netzfrequente
surtensions à fréquence industrielle pour Überspannungen für Hausinstallationen
les applications domestiques et analogues und für ähnliche Anwendungen
This European Standard was approved by CENELEC on 2011-01-17. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50550:2011 E
Foreword
This European Standard was prepared by the CENELEC BTTF 128-1, Power frequency overvoltage
protective device for household and similar applications.
It was submitted to the formal vote and was approved by CENELEC as EN 50550 on 2011-01-15.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates are proposed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop) 2012-01-15
– latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow) 2014-01-15
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive 2004/108/EC. See Annex ZZ.
__________
– 3 – EN 50550:2011
Contents
1 Scope . 5
2 Normative references . 6
3 Terms and definitions . 7
4 Classification . 8
4.1 According to the method of construction . 8
4.2 According to the main protective device . 8
4.3 According to the range of ambient air temperature (only for POP according to 4.2.2 and 4.2.3) . 8
4.4 According to the number of monitored line to neutral conductor voltages . 8
5 Characteristics. 9
5.1 Summary of characteristics . 9
5.2 Limit values of the break times and non-actuating times . 9
6 Marking and other product information . 9
6.1 Standard marking . 9
6.2 Additional marking . 10
7 Standard conditions for operation in service . 11
7.1 General. 11
7.2 Conditions of installation . 11
7.3 Pollution degree . 11
8 Requirements for construction and operation . 11
8.1 Mechanical design . 11
8.2 Protection against electric shock . 16
8.3 Dielectric properties and isolating capability . 16
8.4 Temperature rise . 16
8.5 Operating characteristic . 16
8.6 Mechanical and electrical endurance . 16
8.7 Performance at short-circuit currents . 17
8.8 Resistance to mechanical shock and impact . 17
8.9 Resistance to heat . 17
8.10 Resistance to abnormal heat and to fire . 17
8.11 Ageing of electronic components . 17
8.12 Behaviour at low ambient air temperature . 18
8.13 Electromagnetic compatibility . 18
8.14 Safety performance of overstressed POPs. 18
9 Tests . 18
9.1 General. 18
9.2 Test condition . 19
9.3 Verification of the influence of the POP on the correct operation of the main protective device . 19
9.4 Test of dielectric properties . 21
9.5 Temperature rise . 21
9.6 Verification of the operating characteristics . 21
9.7 Verification of the mechanical and electrical endurance . 23
9.8 Tests of creepage distances and clearances for electronic circuits (abnormal conditions) . 24
9.9 Requirements for capacitors and specific resistors and inductors used in electronic circuits . 27
9.10 Electromagnetic compatibility . 28
9.11 Test of safety performance of overstressed POPs . 32
9.12 Test of reliability of screws, current-carrying parts and connections . 32
9.13 Test of reliability of terminals for external conductors . 32
9.14 Verification of protection against electric shock . 32
9.15 Verification of resistance to mechanical shock and impact . 33
9.16 Test of resistance to heat . 33
9.17 Resistance to abnormal heat and to fire . 33
9.18 Verification of the correct operation at low ambient air temperatures for RCDs for use at
temperatures between -25 °C and +40 °C . 33
Annex A (normative) Test sequences . 36
Annex B (normative) Determination of clearances and creepage distances . 37
Annex C (informative) Examples of terminal designs . 39
Annex D (normative) Number of samples for full test procedure . 42
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives . 44
Bibliography . 45
Figures
Figure 1 – Minimum creepage distances and clearances measured in millimetres . 34
Figure 2 – Minimum creepage distances and clearances as a function of peak value of operating
voltage . 35
Figure B.1 – Illustrations of the application of creepage distances . 38
Figure C.1 – Examples of pillar terminals . 39
Figure C.2 – Examples of screw terminals and stud terminals . 40
Figure C.3 – Examples of saddle terminals . 41
Figure C.4 – Examples of lug terminals . 41
Tables
Table 1 – Limit values of break times and non-actuating times . 9
Table 2 – Minimum clearances and creepage distances . 13
Table 3 – Maximum permissible temperatures under abnormal conditions . 26
Table 4 – Low frequency immunity test conditions . 29
Table 5 – High frequency immunity test conditions . 30
Table 6 – Test conditions for electrostatic discharges . 31
Table 7 – Emissions test conditions . 31
Table A.1 – Test sequences . 36
Table D.1 – Number of samples for full test procedure . 42
Table D.2 – Additional tests for POP already fully tested together with one kind of main protective
device . 43
– 5 – EN 50550:2011
1 Scope
This European Standard applies to power frequency overvoltage protection devices (hereafter referred to
as “POP”) for household an
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