Technical requirements of digital SPC automatic telephone exchange

Standard published on 6.4.1995

Power quality - Three-phase voltage unbalance

Standard published on 18.6.2008

Short-circuit current calculation in three-phase a.c. systems—Part 1: Calculation of currents

Standard published on 17.3.2023

Short-circuit current calculation in three-phase a.c. systems—Part 2: Factors for the calculation of short-circuit currents

Standard published on 29.12.2017

Short-circuit current calculation in three-phase a.c.systems—Part 3:Data of electrical equipment

Standard published on 29.12.2017

Short-circuit current calculation in three-phase a.c.systems—Part 4: Currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents flowing through earth

Standard published on 29.12.2017

Short-circuit current calculation in three-phase a.c.systems—Part 5: Examples

Standard published on 29.12.2017

General rules for packing, marking, transport, storage and quality certificates of unshaped refractory

Standard published on 2.6.2020

Terms of mill rolls

Standard published on 12.10.2022

Blanks of forged steel rolls for cold rolling mill

Standard published on 31.10.2025