1. PD IEC/TR 62271-305:2009. High-voltage switchgear and controlgear - Part 305: Capacitive current switching capability of air-insulated disconnectors for rated voltages above 52 kV

2. PD IEC/TR 62271-307:2015. High-voltage switchgear and controlgear Part 307: Guidance for the extension of validity of type tests of AC metal and solid-insulation enclosed switchgear and controlgear for rated voltages above 1 kV

3. PD IEC/TR 62283:2010. Optical fibres - Guidance for nuclear radiation tests

4. PD IEC/TR 62349:2014. Guidance of measurement methods and test procedures -Basic tests for polarization maintaining optical fibres

5. PD IEC/TR 62350:2006. Guidance for the correct use of residual current-operated protective devices (RCDs) for household and similar use

6. PD IEC/TR 62351-10:2012. Power systems management and associated information exchange - Data and communications security Part 10: Security architecture guidelines

7. PD IEC/TR 62351-12:2016. Power systems management and associated information exchange - Data and communications security Part 12

8. PD IEC/TR 62351-1362016. Power systems management and associated information exchange - Data and communications security Part 13: Guidelines on security topics to be covered in standards and specifications

9. PD IEC/TR 62357-1:2012. Power systems management and associated information exchange Part 1: Reference architecture

10. PD IEC/TR 62357-200:2015. Power systems management and associated information exchange Part 200: Guidelines for migration from Internet Protocol version 4 (IPv4) to Internet Protocol version 6 (IPv6)