1. PD IEC/TR 60071-4:2004. Insulation co-ordination - Part 4: Computational guide to insulation co-ordination and modelling of electrical networks

2. PD IEC/TR 60146-1-2:2011. Semiconductor converters - General requirements and line commutated converters Part 1-2: Application guide

3. PD IEC/TR 60269-5:2010. Low-voltage fuses Part 5: Guidance for the application of low-voltage fuses

4. PD IEC/TR 60479-4:2011. Effects of current on human beings and livestock Part 4: Effects of lightning strokes

5. PD IEC/TR 60664-2-1:2011. Insulation coordination for equipment within low-voltage systems Part 2-1: Application guide - Explanation of the application of the IEC 60664 series, dimensioning examples and dielectric testing

6. PD IEC/TR 60725:2012. Consideration of reference impedances and public supply network impedances for use in determining disturbance characteristics of electrical equipment having rated current ≤ 75 A per phase

7. PD IEC/TR 60787:2007. Application guide for the selection of high-voltage current-limiting fuse-links for transformer circuits

8. PD IEC/TR 60825-13:2011. Safety of laser products - Part 13: Measurements for classification of laser products

9. PD IEC/TR 60825-14:2004. Safety of laser products - Part 14: A user's guide

10. PD IEC/TR 60825-17:2015. Safety of laser products Part 17: Safety aspects for use of passive optical components and optical cables in high power optical fibre communication systems