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Electrical relays -- Part 24: Common format for transient data exchange (COMTRADE) for power systems
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Electrical relays - Tests and measurements - Part 24: Load transfer
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Electrical relays - Tests and measurements - Part 25: Magnetic interference
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Meracie relé a ochranné zariadenia. Časť 26: Požiadavky na elektromagnetickú kompatibilitu (Norma na priame používanie ako STN). (Platnosť do 30.4.2028).
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Measuring relays and protection equipment - Part 26: Electromagnetic compatibility requirements
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Measuring relays and protection equipment - Part 27: Product safety requirements
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Meracie relé a ochranné zariadenia. Časť 27: Požiadavky na bezpečnosť výrobku (Norma na priame používanie ako STN). (Platnosť do 30.4.2028).
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Available design: Print design
Electrical relays - Testing and measurement - Part 27: Electrical contact noise
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Electrical relays - Tests and measurement - Part 28: Thermoelectric electromotive force (e.m.f.)
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Electrical relays - Tests and measurements - Part 29: Capacitance
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