组合使用关键词、标准类型、状态与 ICS 分类，快速定位所需国家标准。
找到 330 条
GB/T 31838.6-2021
Solid insulating materials—Dielectric and resistive properties—Part 6:Dielectric properties(AC method)—Relative permittivity and dielectric dissipation factor (frequencies 0.1Hz~10MHz)
GB/T 21227-2021
AC loss measurements—Magnetometer methods for hysteresis loss in superconducting multifilamentary composites
GB/T 18216.5-2021
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c.—Equipment for testing, measuring or monitoring of protective measures—Part 5: Resistance to earth
GB/T 18216.4-2021
Electrical safety in low voltage distribution systems up to 1000V a.c and 1500V d.c—Equipment for testing，measuring or monitoring of protective measures—Part 4：Resistance of earth connection and equipotential bonding
GB/T 18216.3-2021
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c.—Equipment for testing, measuring or monitoring of protective measures—Part 3: Loop impedance
GB/T 18216.2-2021
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c.—Equipment for testing, measuring or monitoring of protective measures—Part 2: Insulation resistance
GB/T 18216.1-2021
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c.—Equipment for testing, measuring or monitoring of protective measures—Part 1: General requirements
GB/T 26667-2021
Terminology for electromagnetic shielding materials
GB/T 19346.3-2021
Methods of measurement of amorphous and nanocrystalline alloys—Part 3： AC magnetic properties of Fe-based amorphous strip using a single sheet specimen
GB/T 17215.321-2021
Electricity metering equipment (AC)—Particular requirements—Part 21：Static meters for active energy(classes A, B, C, D and E)
GB/T 17215.211-2021
Electricity metering equipment(AC)—General requirements, tests and test conditions—Part 11：Metering equipment
GB/T 39853.2-2021
Power quality measurement in power supply systems—Part 2: Functional tests and uncertainty requirements
GB/T 39853.1-2021
Power quality measurement in power supply systems—Part 1: Power quality instruments (PQI)
GB/T 39843-2021
Electronic characteristic measurements—Local critical current density and its distribution in large-area superconducting films
GB/T 17215.221-2021
Electricity metering equipment(a.c.)—General requirements, tests and test conditions—Part 21:Tariff and load control equipment
GB/T 39588-2020
Requirements and test methods for electrostatic shielding packaging bags
GB/T 25897-2020
Residual resistance ratio measurement—Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
GB/T 39722-2020
Superconducting electronic devices—Generic specification for sensors and detectors
GB/T 38947-2020
Magnetic flux density test method for magnetic separators
GB/T 38888-2020
Performance and calibration methods for data acquisition software