Bsi bs en 50065 4 7 2005 (2007)

BRITISH STANDARD Signalling on lowvoltage electrical installations in the frequency range kHz to 148,5 kHz and 1,6 MHz to 30 MHz — Part 4-7: Portable low voltage decoupling filters — Safety requirements ICS 31.160; 33.040.30; 97.120 12&230,5 A through the terminals of the capacitor, shall have a dielectric strength to withstand the required impulse voltage that calculated or measured will be over the component when the dielectric test specified in Clause 30 is applied to the filter device These capacitors shall comply with the requirements of EN 132400 for the relevant impulse voltage Capacitors between live conductors (L or N) and earth (PE) shall be a Y type and capacitors between live conductors (L and N) shall be X type according to EN 132400 The nominal voltage of such capacitors shall be in accordance with the nominal voltage of the filter device Conformity is checked by inspection and by measurement 27.4 Resistors Resistors, the short-circuiting or interrupting of which would, in case of a defect, cause an infringement of the requirements with regard to the protection against fire and electric shock, shall have an adequately constant value under the abnormal condition in Clause 28 These resistors shall comply with the requirements of Subclause 14.1 in EN 60065 Conformity is checked by inspection and by measurement and test 27.5 Components reducing the required impulse voltage Components used for reducing the required impulse voltage and clearance according to Table shall have adequate dielectric strength Components shall be designed to withstand the impulse voltage that calculated or measured will be over the component when the dielectric test specified in Clause 30 is applied to the filter device Conformity is checked by inspection or by measurement and test EN 50065-4-7:2005 28 – 38 – Abnormal conditions 28.1 General Abnormal conditions mean either an overload or a single fault condition The filter device shall not create hazard such as danger of fire or electric shock under abnormal conditions A single fault condition shall not cause the current protective device of the installation to operate Compliance is checked by the tests specified in 28.2 to 28.4 28.2 Fault test When the filter device is operated under abnormal conditions no part shall reach such a temperature that there is danger of fire to the surroundings of the filter device Compliance is checked by subjecting the filter device to a heating test under abnormal conditions, as described in 28.2.1 During the tests any flame inside the filter part shall be extinguished within a period of 10 s During the test, the temperature rises shall not exceed the value given in Clause 16 Unless otherwise specified, the tests are made on the filter device while it is connected and loaded as specified in Clause 16 Each of the abnormal conditions indicated in 28.2.1 is applied in turn The abnormal conditions are applied in the order, which is the most convenient for testing 28.2.1 The following fault conditions shall be simulated: – short circuit across creepage distances and clearances, other than those complying with the requirements in Clause 24; – short circuit across insulating coatings consisting, for example, of lacquer or enamel; – short circuit or interruption of semiconductor devices; – short circuit of electrolytic capacitors; – short circuit of capacitors and resistors which not need to fulfil the requirements of Clause 27 When a specified fault condition test is carried out, it can cause consequential faults, which either interrupt or short-circuit other components In case of doubt, the fault condition test shall be repeated up to two more times with replacement components in order to check that the same result is always obtained Should this not be the case, the most unfavourable consequential fault, whether interruption or short circuit, shall be applied together with the specified fault condition If the temperature of the filter device is limited by the operation of temperature protective devices (including fuses), the temperature is measured after the operation of the device If no temperature-limiting device operates, the temperature is measured after a steady state has been reached or after h, whichever is the shorter time If the temperature is limited by a fuse, the following additional test is carried out: The fuse is short-circuited and the current under the relevant fault condition is measured The filter device is then loaded for a duration corresponding to the maximum fusing time of the type of fuse as specified by EN 60127 at the fault current measured above The temperature is measured after the end of the period – 39 – EN 50065-4-7:2005 28.3 Overload test The filter device without incorporated temperature-limiting devices and without incorporated fuses are loaded for h with the conventional tripping current for the protective device which in the installation will protect the filter device The manufacture shall in the installation instructions declare the type of the protective device together with the related maximum nominal value of the protective device The maximum temperature is measured during the test The filter device protected by temperature protective devices (including fuses) are loaded in such a way that the current through the filter device is 95 % of the current with which the protecting device releases after h The temperature rise is measured after a steady state has been reached or after h, whichever is the shorter time The filter device protected by incorporated fuses complying with EN 60127 shall have those fuses replaced by links of negligible impedance and shall be loaded in such a manner that the current through the links shall be 2,1 times the nominal current of the fuse The temperature rise is measured after the current has been applied for 30 28.4 Protection against electric shock Protection against electric shock is required, even though the filter device is being used or has been used during fault conditions Compliance is checked by the tests described in 28.2 and 28.3 The filter device, having been subjected to the test, shall comply with the requirements of Clause 10 29 Protection against short-circuit The filter devices shall be able to withstand the short-circuit current until it is interrupted either by the filter itself, by an internal fuse or from a 16 A backup overcurrent protection Compliance is checked by the following test: The test current shall be within - % and + % of the nominal conditional short-circuit current The test voltage and frequency shall be with ± % of the nominal value The filter device shall be tested in free air placed on a metal support The test circuit shall consist of the 16 A fuse, an auxiliary switch, and an impedance in series with the filter device The impedance shall be adjustable to satisfy the specified test conditions All parts of the filter device normally earthed in service, including the metal support or the enclosure, shall be insulated from earth and connected through a fusible element to neutral of the supply The fusible element shall consist of a copper wire 0,8 mm in diameter and at least 50 mm long, or of an equivalent fusible element for the detection of the fault current The prospective fault current in the fusible element circuit shall be 500 A ± 10 % If necessary, a resistor in series with the fusible element limiting the current to that value shall be used The test is made on three new samples with the conditional short-circuit current assigned by the manufacturer The type and value of the SCPD, the conditional short-circuit current and the test circuit shall be stated in the test report EN 50065-4-7:2005 – 40 – During the test there shall be no flashover between poles or between poles and enclosure/support and no melting of the fusible element After the test the filter device shall show no damage impairing the further use and shall be capable of withstanding a dielectric test according to Clause 15 The dielectric test shall not be carried out later than 24 h after the conditional short-circuits test 30 Resistance to transients The filter device shall withstand transients, which may occur in normal use without causing hazard of electric shock or fire Compliance is checked by the following test: The test is carried out on a filter placed on a metal support, wired as in normal The impulse voltage is given by a generator producing impulses having a front time of 1,2 µs and a time to half value of 50 µs The test shall be done with an hybrid impulse generator and shall be according to EN 61180-1 and EN 61180-2 with the following characteristics: – an impulse test voltage of 2,5 kV for overvoltage category II or kV for overvoltage category III shall be used; – an AC voltage of Un shall be applied on the mains terminal of the filter device during the test; – the surge impedance of the test apparatus should be 12 Ω 0/–20 % A first series of tests is made with the impulses being applied between the two poles of the filter device A second series of tests is made with the impulses being applied between the metal-support connected together with the terminals intended for the protective conductor if any and the poles in turns In all cases, five positive impulses and five negative impulses are applied, the interval between consecutive impulses being at least 10 s During the test no sustained arcing, ignition, bursting of the enclosure or other damages causing electric shock or fire hazard shall occur After the test the filter device shall show no damage impairing the further use and shall be capable of withstanding a dielectric test according to Clause 15 – 41 – EN 50065-4-7:2005 7.3.1 Intermediate adaptor 7.3.2.1 Non-rewirable filter cord extension set The plug incorporate the filter portion 7.3.2.2 Non-rewirable filter cord extension set The filter portion with non-rewirable cable in both ends 7.3.2.3 Non-rewirable filter cord extension set The socketoutlets incorporate the filter portion 7.3.3.1 Filter incorporating the plug and a set of terminals 7.3.3.2 Filter incorporating the plug and one non-rewirable cord 7.3.4.1 Filter equipped, on the supply side, with one non-rewirable cord with one plug and on the output side, with a set of terminals 7.3.4.2 Filter equipped, on the supply side, with one non-rewirable cord with one plug and on the output side, with one nonrewirable cord 7.3.4.5 Filter portion equipped on both side with one nonrewirable cord Figure – Examples of types of connection classified according to 7.3 EN 50065-4-7:2005 – 42 – Dimensions in millimetres Figure – Apparatus for testing the cord retention (20.2) – 43 – An adjustment of the different supports for the accessories by means of a threaded spindle shall be provided as per the explanation in 20.3.2 Figure – Apparatus for flexing test (20.3.2) EN 50065-4-7:2005 – 44 – ∅ 10,5 A Falling weight 000 ± g A R ∅ 20 = 30 Sample Steel intermediate piece 100 g 40 Steel support 10 ± Kg 8,6 100 EN 50065-4-7:2005 Slightly rounded edges 8,6 8, Section A-A IEC 1338/02 Dimensions in millimetres Figure – Apparatus for impact test at low temperature (21.2.3) – 45 – EN 50065-4-7:2005 Annex A (normative) Pollution degrees The micro-environment determines the effect of pollution on the insulation The macro-environment, however, has to be taken into account when considering the micro-environment Within a filter, designed for a particular pollution degree, enclosures or sealing may be provided to allow the use of clearances and creepage distances appropriate for a lower pollution degree Such means to reduce pollution may not be effective when the filter is subject to condensation Small clearances can be bridged completely by solid particles, dust and water and therefore minimum clearances are specified where pollution may be present in the micro-environment NOTE Pollution will become conductive in the presence of humidity Pollution caused by contaminated water, soot, metal or carbon dust is inherently conductive For the purpose of evaluating creepage distances and clearances, the following three degrees of pollution in the micro-environment are established – Pollution degree No pollution or only dry, non-conductive pollution occurs The pollution has no influence – Pollution degree Only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation is to be expected – Pollution degree Conductive pollution occurs or dry non-conductive pollution occurs which becomes conductive due to condensation, which is to be expected EN 50065-4-7:2005 – 46 – Annex B (normative) Proof tracking test The proof tracking test (PTI) is carried out in accordance with EN 60112 For the purpose of this standard, the following applies: a) In Clause 5, Test specimen, the paragraph after Note does not apply Moreover, Note and the last paragraph also apply to the proof tracking test of Clause 10 NOTE If the surface 15 mm × 15 mm cannot be obtained, because of the small dimensions of the filter, special specimens made with the same manufacturing procedure may be used b) The test solution "A" described in 7.3 shall be used c) If the test is carried out with electrodes of materials other than platinum, this shall be reported d) The tolerance on the interval between drops shall be ± s e) In Clause 10, Determination of proof tracking index (PTI), the voltage referred to in 10.1 is set to the value as determined from 24.2.2 of this standard dependent on the material group taken from Table10 or Table 11 of this standard for the measured creepage distance considering the declared pollution degree and the voltage (rated voltage) expected to occur in normal use f) Clause 11, Determination of comparative tracking index (CTI) does not apply – 47 – EN 50065-4-7:2005 Annex C (normative) Types of coatings for rigid printed board assemblies Type A coating: Provides only protection against pollution by improving the environment for spacings between printed wiring conductors under the coating to pollution degree The clearance and creepage distance requirements of 24.2 and 24.3 apply to the rigid printed board assembly under the coating Type B coating: Provides protection against pollution and insulation by enclosing the conductors in solid insulation so that the clearance and creepage distance requirements of 24.2 and 24.3 are not applicable between conductors under the coating NOTE Coating can be effective between two conducting parts if it covers either one or both conductive parts, together with at least 80 % of the creepage distance between them As a result, some coated rigid printed board assemblies can be used with higher voltage or reduced clearances and creepage distances between conductive parts compared to the same rigid printed board assembly when uncoated NOTE Clearance and creepage distance requirements according to 24.2 and 24.3 apply to all uncoated parts of the rigid printed board assembly and between conductive parts over the coating – 48 – EN 50065-4-7:2005 Annex D (normative) Special national conditions Special national condition: National characteristic or practice that cannot be changed even over a long period, e.g climatic conditions, electrical earthing conditions NOTE If it affects harmonization, it forms part of the European Standard / Harmonization Document For the countries in which the relevant special national conditions apply these provisions are normative, for other countries they are informative Clause Special national condition 7.4 Norway For outdoor locations, temperatures may be expected to vary between -40 °C and + 60 °C with average relative humidity of approximately 75 % non -condensing For 30 days per year relative humidity can be expected to vary between 85 % and 95 % non-condensing blank BS EN 50065-4-7:2005 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents 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