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IEC – The company IEC is world-leading organization, which creates and issues International standards for all electrical, electronic and other related technologies known generally as electro-technologies. Wherever, there is electricity and electronics you can find the company IEC, which promotes the safety and performance, the environment, electrical energy efficiency and renewable energy. The company IEC also administers conformity assessment systems, which certify that the equipment, systems or components comply with International Standards of this company.
Measuring relays and protection equipment - Part 149: Functional requirements for thermal electrical relays
(Relais de mesure et dispositifs de protection - Partie 149: Exigences fonctionnelles pour les relais electriques thermiques)
Standard published on 30.7.2013
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Measuring relays and protection equipment - Part 151: Functional requirements for over/under current protection
(Relais de mesure et dispositifs de protection - Partie 151: Exigences fonctionnelles pour les protections a minimum et maximum de courant)
Standard published on 28.8.2009
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Measuring relays and protection equipment - Part 181: Functional requirements for frequency protection
(Relais de mesure et dispositifs de protection – Partie 181: Exigences fonctionnelles relatives aux protections de frequence)
Standard published on 27.2.2019
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Measuring relays and protection equipment - Part 187-1: Functional requirements for differential protection - Restrained and unrestrained differential protection of motors, generators and transformers
(Relais de mesure et dispositifs de protection - Partie 187-1: Exigences fonctionnelles pour la protection differentielle - Protection differentielle avec et sans caracteristique de retenue des moteurs, generateurs et transformateurs)
Standard published on 28.7.2021
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Corrigendum 1 - Measuring relays and protection equipment - Part 187-1: Functional requirements for differential protection - Restrained and unrestrained differential protection of motors, generators and transformers
(Corrigendum 1 - Relais de mesure et dispositifs de protection - Partie 187-1: Exigences fonctionnelles pour la protection differentielle - Protection differentielle avec et sans caracteristique de retenue des moteurs, generateurs et transformateurs)
Correction published on 21.4.2023
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Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section One: Vibration tests (sinusoidal)
(Relais electriques - Vingt et unieme partie: Essais de vibrations, de chocs, de secousses et de tenue aux seismes applicables aux relais de mesure et aux dispositifs de protection - Section un: Essais de vibrations (sinusoidales))
Standard published on 30.9.1988
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Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section Two: Shock and bump tests
(Relais electriques - Vingt et unieme partie: Essais de vibrations, de chocs, de secousses et de tenue aux seismes applicables aux relais de mesure et aux dispositifs de protection - Section deux: Essais de chocs et de secousses)
Standard published on 31.10.1988
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Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section 3: Seismic tests
(Relais electriques - Partie 21: Essais de vibrations, de chocs, de secousses et de tenue aux seismes applicables aux relais de mesure et aux dispositifs de protection - Section 3: Essais de tenue aux seismes)
Standard published on 21.9.1993
Selected format:Measuring relays and protection equipment - Part 216-1: Digital interface - General requirements and tests for protection functions using digital communication as input and output
Standard published on 11.8.2025
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Measuring relays and protection equipment - Part 24: Common format for transient data exchange (COMTRADE) for power systems
(Relais de mesure et dispositifs de protection - Partie 24: Format commun pour l´echange de donnees transitoires (COMTRADE) dans les reseaux electriques)
Standard published on 30.4.2013
Selected format:Latest update: 2026-04-01 (Number of items: 2 270 267)
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