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DIN EN IEC 60255-26/A1
Measuring relays and protection equipment - Part 26: Electromagnetic compatibility requirements
DIN EN IEC 60255-27/A1
Measuring relays and protection equipment - Part 27: Product safety requirements
DIN EN IEC 60255-132
Measuring relays and protection equipment - Part 132: Functional requirements for directional power protection
DIN EN IEC 60255-167
Measuring relays and protection equipment - Part 167: Functional requirements for directional overcurrent protection
DIN EN IEC 60255-187-3
Measuring relays and protection equipment - Part 187-3: Functional requirements for differential protection - Line current differential protection
DIN EN IEC 60255-216-2
Measuring Relays and Protection Equipment - part 216-2: - Digital interface - Requirements for Binary Input-Output IED
DIN EN IEC 60255-216-3
Measuring relays and protection equipment - Part 216-3: Digital Interface - Test specification for protection data communication of Line Current Differential Protection
DIN EN IEC 60268-3
Sound system equipment - Part 3: Amplifiers
DIN EN IEC 60268-20
Sound system equipment - Part 20: Microspeakers
DIN EN IEC 60268-21/A1
Sound system equipment - Part 21: Acoustical (output-based) measurements
