BS EN 61439-1 PDF

date BS EN is withdrawn and BS EN and BS EN In addition IEC and IEC have been amended, clarified and. For each type of electrical AssEMBLY only two parts of the standard are necessary to determine all requirements: the basic standard IEC “ General rules. What changes does BS EN bring? • New testing procedure including design and routine verification. • Alternative testing routes. • Clear requirements for.

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Together with BS EN This part of IEC lays down the definitions and states the service conditions, construction requirements, technical characteristics and verification requirements for low-voltage switchgear and controlgear assemblies. This applies also to built-in apparatus, even if they have a connecting terminal for a protective conductor.

However, the risk of disruptive discharge should be considered. Learn more about the cookies we use and how to change your settings.

If an actuator is made of metal whether covered by insulating material or notit shall be provided with insulation rated for the maximum rated insulation voltage and the maximum impulse withstand voltage of all circuits in the ASSEMBLY.

British Standards

This symbol is not required where the external protective conductor is intended to be connected to an internal protective conductor, which is clearly identified with the colours green and yellow. The calculation methods used to establish these values are given to enable 61439–1 to be calculated for other conditions.

Also known as IEC The mechanical operation of removable parts, including any insertion interlock, shall be verified by test according to The original manufacturer shall determine 64139-1 relevant items of the test, such as type of supply, number of phases and frequency where applicablecross-sections of test conductors, etc.

Characteristic to be verified Verification Verification by Verification by subclauses by testing calculation design rules 1 Strength of material and parts: The frequency, the level and the consequences of these emissions are considered as part of the normal electromagnetic environment of low-voltage installations.

BS EN 低压开关设备和控制设备装配模块.电源开关设备和控制设备装配模块 – MBA智库文档

If, after the removal of a withdrawable part, the original degree of protection is not maintained, an agreement shall be reached between the ASSEMBLY manufacturer and user as ns what measures shall be taken to ensure adequate protection. The Vs is verified by loading the incoming circuit to its rated current and all outgoing functional units collectively to their rated current multiplied by the diversity factor.

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However, the specified degree of protection shall at the same time be maintained. The faster, easier way 61349-1 work with standards. NOTE The pollution degree of the micro-environment for the equipment may be influenced by installation in an enclosure.

Certain exposed conductive parts of an ASSEMBLY that do not constitute a danger — either because they cannot be touched on large surfaces or grasped with the hand, — or because they are of small size approximately 50 mm by 50 mm or rn located as to exclude any contact with live parts, need not be connected to a protective conductor. In order to prevent unauthorized operation, the switching device may be provided with means to secure it in one or more of its positions.

Ex-cept as permitted under the Copyright, Designs and Patents Act no ex-tract may be reproduced, stored in a retrieval system or transmitted in anyform or by be means — electronic, photocopying, recording or otherwise —without prior written permission from BSI. The original manufacturer shall determine the reference design s that will be used in We have lifting eyes held in a 2 rack system, each time an eye is used it is returned to the lower rack, once all the eyes from the top rack are used the racks are swapped over — this ensures rotation of all the lifting eyes on an even basis during the year.

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Where tests on the ASSEMBLY have been conducted in accordance with the IEC series, prior to the publication of the relevant product standard in the IEC series, and the test results fulfill the requirements of the relevant part of IECthe verification of these requirements need not be repeated. Industrial vs are in addition characterised by the existence of one or more of the following: You may experience issues viewing this site in Internet Explorer 9, 10 or For this type of protection, see Annex K.

For the test carried out in accordance with ISO no grooves shall be cut into the sample and the impact shall be applied to the exposed surface. The original manufacturer may provide data on the suitability of materials from the insulating material supplier to demonstrate compliance with these requirements. BS EN and This sequence, shall be carried out three times at uniform speed, each sequence being carried out within 1 min.

Creepage distance through uncemented Rule: After the test the marking shall be legible to normal or corrected vision without additional magnification. For small parts having surface dimensions not exceeding 14 mm x 14 mman alternative test may be used e. 61439–1 distances shall correspond to a pollution degree as specified in 7. Any damaged units are disposed of and replacements purchased.

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To shorten the test, if the devices allow it, the current may be increased during the first part of the test, it being reduced to the specified test current afterwards. NOTE 2 A comparison of the resistances measured before and after the test, between the terminal for the incoming protective conductor and the terminal for the relevant outgoing protective conductor, gives an indication of conformity with this condition.

As an alternative the original manufacturer shall provide data on the suitability of 16439-1 from the insulating material supplier to demonstrate compliance with the requirements of 8.

Scope of the standard – IEC – Siemens

Want access to 614399-1 Standards? Document Status Indicators The Green document status indicator indicates that the document is: No traces of the cloth shall remain on the sample and the material of the enclosure or sample shall not stick to the cloth.

Worldwide Standards We can source any standard from anywhere in the world. Cooling air available to a circuit may be at a temperature well in excess of the ambient due fn the influence of other circuits.

If a protective conductor, which is extended to electrical equipment connected to the load side of the ASSEMBLY, is to be passed through an ASSEMBLY whose exposed conductive parts are insulated, the necessary terminals for connecting the external protective conductors shall be provided and identified by suitable marking. For functional units containing only one device this is the rated current of the device.

Busbar trunking systems to supersede IEC The connecting means to ensure the continuity of the conductive parts with external protective conductors shall have no other function. The choice depends on such factors as service conditions, frequency of maintenance, competence of the authorized person, as well as local installation rules. Provides definitions and service conditions for assemblies with rated voltage not exceeding 1,V a.

When a control electro-magnet is energized during the test, the temperature is measured when thermal equilibrium is reached in both the main circuit and the control electro-magnet.