This edition supersedes the first edition of IEC 255-8 (1978) and IEC 255-17 (1982). Applies to dependent specified time electrical measuring relays which protect equipment from electrical thermal damage by the measurement of current flowing in protected equipment.
INTERNATIONAL 255-8
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This standard has been prepared by Sub-Committee 41B: Measuring relays and protection equipment, of IEC Technical Committee 41: Electrical relays. This standard constitutes the second edition of I E C Publication 255-8 and replaces the first edition (1978).
IEC-255-8 | Part 8: Thermal Electrical Relays, Electrical ...
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Thermal overload relays Type TA Thermal Class 10 elays ...
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according to IEC 947-4-1 the maximum tripping time in seconds under specified conditions of test at 7.2 times the setting current and specifies tripping and non tripping times for …
(conforming to IEC 255-8) Normal operation ˚C - 20…+ 55 (1) Maximum operating altitude Without derating m 2000 Operating positions In relation to normal, vertical Any position without derating mounting plane Shock resistance Permissible acceleration 13 gn - 11 ms conforming to IEC 68-2-27
iec 255-4 datasheet, cross reference, circuit and application notes in pdf format. The Datasheet Archive. Search. Browse by Manufacturer Get instant insight into any electronic component. Try Findchips PRO for iec 255-4. Top Results (6) Part ... Text: : IEC 255-8, ...
din iec 255-8 vde 0435-3011 * German Language Version * Electromagnetic compatibility (EMC); Product standard for measuring relays and protection equipment; German version prEN 50163:1996