Bulgarian Institute for Standardization
Standards – always a step ahead
Phone: +359 2 8174 523, +359 2 8174 504
E-mail: info@bds-bg.org
1797 Sofia, 13 "Lachezar Stanchev" Str., "Izgrev" Complex
ID number: 175079183, VAT number: BG175079183
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Projects and standards

To find easily the necessary information, use the different options for advanced search below, e.g. search by technical committee; by keyword in Bulgarian/English; by reference and others.

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

60.55 Ratification completed (DOR)

ТК-79 more

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

10.99 New project approved

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

60.55 Ratification completed (DOR)

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

60.55 Ratification completed (DOR)

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

60.55 Ratification completed (DOR)

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

45.99 Dispatch of FV draft to CCMC

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

60.55 Ratification completed (DOR)

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

40.20 DIS ballot initiated

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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

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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

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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

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Power transformers - Part 25: Neutral grounding resistors

50.60 Close of voting. Proof returned by secretariat

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

10.99 New project approved

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

10.99 New project approved

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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

ТК-79 more

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

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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

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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

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