Projects and standards

Outdoor bushings for 24 kV and 36 kV and for 5 kA and 8 kA, for liquid filled transformers

60.55 Ratification completed (DOR)

Power transformers - Additional European requirements - Part 1-1: Common part - General requirements

10.99 New project approved

Power transformers - Additional European requirements - Part 2-3: Medium power transformer - Accessories

60.55 Ratification completed (DOR)

Power transformers - Additional European requirements - Part 2-4: Medium power transformer - Special tests

60.55 Ratification completed (DOR)

Power transformers - Additional European requirements - Part 2-6: Medium power transformers - Non-conventional magnetic steel technology

60.55 Ratification completed (DOR)

Power transformers - Additional European requirements - Part 3-1: Large power transformer - General requirements

45.99 Dispatch of FV draft to CCMC

Power transformers - Additional European requirements - Part 3-4: Large power transformer - Special tests for corrugated tank and radiators

60.55 Ratification completed (DOR)

Connecting terminal flags for bushings from 250A to 4 000 A for insulating liquid filled transformers

40.20 DIS ballot initiated

Power transformers - Part 19: Rules for the determination of uncertainties in the measurement of the losses on power transformers and reactors

10.99 New project approved

Power transformers - Part 19-1: Rules for the determination of uncertainties in the measurement of the losses on power transformers

10.99 New project approved

Power transformers - Part 19 - 1: Rules for the determination of uncertainties in the measurement of the losses of power transformers

40.60 Close of voting

Power transformers - Part 25: Neutral grounding resistors

50.60 Close of voting. Proof returned by secretariat

Power transformers - Part 4: Guide to the lightning impulse and switching impulse testing - Power transformers and reactors

10.99 New project approved

Synthetic organic esters for electrical purposes - Guide for maintenance of transformer esters in equipment

10.99 New project approved

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-1: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications

50.60 Close of voting. Proof returned by secretariat

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V

40.20 DIS ballot initiated

Safety of transformers, reactors, power supply units and combination thereof - Part 2-12: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage

40.20 DIS ballot initiated

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-13: Particular requirements and tests for auto-transformers and power supply units incorporating auto-transformers for general applications

50.60 Close of voting. Proof returned by secretariat