The current during the test shall have any convenient value between 50 A and the rated normal current. The supply system should preferably be referenced to earth i. Impact, spring hammer IEC Reference number IEC In this case, neither of the two voltage values applied to the two terminals shall be less than one-third of the rated withstand voltage phase-to-earth; alternative method:
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Contactors and motorstarters — Section 2: Two EMC severity classes are defined for interfaces or iec 60694 of secondary systems or subassemblies: NOTE The R 10 series comprises the numbers 1 — 1,25 — 1,6 — 2 — 2,5 — 3,15 — 4 — 5 — 6,3 — 8 and their products iec 60694 10 n. The voltage is measured at the supply terminals of the auxiliary equipment.
The location of the earthing point should be defined according to good practice.
The operational characteristics of the auxiliary oec should comply with one of the classes shown in table IEC Copyright – all rights reserved No part of this publication may be reproduced or iec 60694 in irc form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. NOTE On contact materials, oxidation may occur which decreases the effective current-carrying capabilities.
In this case, ief of the two voltage values applied to the two terminals shall be less than one-third of the rated withstand voltage phase-to-earth; alternative method: The measurement of the d. If maximum closing and opening times are stated by the manufacturer, these shall not be exceeded. Missing page numbers correspond to the Frenchlanguage pages. AC semiconductor motor controllers and starters IEC iec 60694 The test voltages are given in table 2a or 2b.
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IEC gives three examples of fuse systems as standardized systems with respect to their safety aspects. Iec 60694 outdoor switchgear and controlgear, the nameplates and their fixings shall be weatherproof and corrosion-proof. Insulation tests for electrical relays IEC For coils, the method of measuring the temperature rise by variation of resistance shall normally be used. Iec 60694 voltage of 1,1 U r 3 shall be applied irc the switchgear and controlgear and maintained for at least 5 min, U r being the rated voltage of the switchgear and controlgear.
Testing and measurement techniques — Section 4: The temperature of lec liquid dielectric itself shall be measured in the upper layer of the dielectric.
Guide for application of IEC 62271-100 and IEC 60694. Part I
NOTE 1 For internal insulation, the dielectric characteristics are identical at any altitude and no special precautions need to be taken. This standard applies to all high-voltage switchgear and controlgear except as otherwise specified in the relevant IEC standards for iec 60694 particular type of switchgear and controlgear. The standard value of rated short-time withstand current should be selected from the R 10 series specified in IECand shall be equal to the short-circuit rating assigned to switchgear and controlgear.
The diameter iec 60694 the clamping screw or bolt shall be at least 12 mm.
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The resistance of the closed class 1 and class 2 auxiliary contacts shall not exceed 50? The number of free auxiliary contacts and the class of each one shall be specified to the manufacturer in accordance with clause 9 of the relevant equipment standard. Control circuit devices and switching elements — Section One: Barriers, shapes of openings or any other means — whether attached to the enclosure or iec 60694 by the enclosed equipment suitable to prevent or limit the penetration of the specified test probes are considered as a part of the enclosure, except when they can be removed without the use of a key or tool.
Methods of measurement and procedure for determining limits Amendment 1 Other International Standards are referred to for information in this standard. Rated supply frequency of closing and opening devices and of auxiliary circuits The standard values of rated supply frequency are DC, 50 Hz and 60 Hz.
The magnitude of induced voltages in a secondary system depends both on the secondary system itself and on conditions such as the earthing and rated voltage of the main circuit. Standard values of iec 60694 voltages are given below: Customer Service Centre If you have any questions regarding this publication or need further assistance, please contact the Iec 60694 Service Centre: The withstand voltage values “across the isolating distance” are valid only for the switching devices where the clearance between open contacts is designed to meet the safety requirements specified for disconnectors.
In addition a means of charging a spring or weight by hand shall be provided if specified to the iec 60694 such means shall comply with 5.
This condition is usually obtained when the variation does not exceed 1 K in 1 h.