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DIN IEC/TR 60909-4
Short-circuit currents in three-phase AC systems - Part 4: Examples for the calculation of short-circuit currents (IEC TR 60909-4:2021)
IEC/TC 109/JWG 4
Insulation coordination for equipment within a voltage range between 1 000 V and 2 000 V A.C. or between 1 500 V and 3 000 V D.C.
DIN IEC 61097-4
Global maritime distress and safety system (GMDSS) - Part 4: Inmarsat-C ship earth station and Inmarsat enhanced group call (EGC) equipment - Operational and performance requirements, methods of testing and required test results (IEC 80/1077/CDV:2023); Text in German and English
DIN EN 1793-4
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 4: Intrinsic characteristics - In situ values of sound diffraction; German and English version prEN 1793-4:2023
prEN ISO 16486-4
Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing - Part 4: Valves (ISO/DIS 16486-4:2024)
ISO 16140-4 AMD 1
Microbiology of the food chain - Method validation - Part 4: Protocol for method validation in a single laboratory - Amendment 1: Validation of a larger test portion size for qualitative methods
prEN ISO 28706-4 rev
Vitreous and porcelain enamels - Determination of resistance to chemical corrosion - Part 4: Determination of resistance to chemical corrosion by alkaline liquids using a cylindrical vessel
DIN IEC 60331-4
Tests for electric cables under fire conditions - Circuit integrity - Part 4: Test method for fire with shock at a temperature of at least 830 °C for cables of rated voltage higher than 1kV up to and including 30 kV
DIN EN 319532-4
Electronic Signatures and Infrastructures (ESI) - Registered Electronic Mail (REM) Services - Part 4: Interoperability profiles (Endorsement of the English version EN 319 532-4 V1.3.0 (2023-10) as a German standard)
DIN EN ISO 13164-4
Water quality - Radon-222 - Part 4: Test method using two-phase liquid scintillation counting (ISO 13164-4:2023); German version EN ISO 13164-4:2023
