CEN CENELEC - Page 1245/1255

• Norma Técnica HD 537 S1

  Title: Test requirements for the evaluation of the emission of ionized gases during short-circuit tests of residual current operated circuit-breakers with integral overcurrent protection for household and similar use (clauses 7 and 8 of IEC 23E(Central Office)69 and IEC 23E(Central Office)97, modified)
  Entity: CEN CENELEC
  Subject: Fuses and other overcurrent protection devices

• Norma Técnica HD 538.1 S1

  Title: Three-phase dry-type distribution transformers 50 Hz, from 100 to 2500 kVA, with highest voltage for equipment not exceeding 36 kV; part 1: general requirements and requirements for transformers with highest voltage for equipment not exceeding 24 kV
  Entity: CEN CENELEC
  Subject: Transformers. Reactors

• Norma Técnica HD 538.2 S1

  Title: Three-phase dry-type distribution transformers 50 Hz, from 100 to 2500 kVA, with highest voltage for equipment not exceeding 36 kV - Part 2: Supplementary requirements for transformers with highest voltage for equipment equal to 36 kV
  Entity: CEN CENELEC
  Subject: Transformers. Reactors

• Norma Técnica HD 538.3 S1

  Title: Three-phase dry-type distribution transformers 50 Hz, from 100 to 2500 kVA, with highest voltage for equipment not exceeding 36 kV - Part 3: Determination of the power rating of a transformer loaded with non-sinusoidal current
  Entity: CEN CENELEC
  Subject: Transformers. Reactors

• Norma Técnica HD 539 S1

  Title: Reactors (IEC 60289:1988)
  Entity: CEN CENELEC
  Subject: Transformers. Reactors

• Norma Técnica HD 539 S2

  Title: Reactors (IEC 60289:1988, modified)
  Entity: CEN CENELEC
  Subject: Transformers. Reactors

• Norma Técnica HD 540.2 S1

  Title: Insulation co-ordination; part 2: application guide (IEC 60071-2:1976)
  Entity: CEN CENELEC
  Subject: Insulation in general

• Norma Técnica HD 540.3 S1

  Title: Insulation co-ordination; part 3: phase-to-phase insulation co-ordination; principles, rules and application guide (IEC 60071-3:1982)
  Entity: CEN CENELEC
  Subject: Insulation in general

• Norma Técnica HD 541 S1

  Title: Methods of test for the determination of the ignitability of solid electrical insulating materials when exposed to electrically heated wire sources (IEC 60829:1988, modified)
  Entity: CEN CENELEC
  Subject: Ignitability and burning behaviour of materials and products

• Norma Técnica HD 542 S1

  Title: Insulating poles (insulating sticks) and universal tool attachments (fittings) for live working
  Entity: CEN CENELEC
  Subject: Protection against electric shock. Live working.

• Norma Técnica HD 543.1 S1

  Title: Performance and testing of teleprotection equipment of power systems; part 1: narrow-band command systems (IEC 60834-1:1988, modified)
  Entity: CEN CENELEC
  Subject: Control equipment for electric power systems

• Norma Técnica HD 543.2 S1

  Title: Performance and testing of teleprotection equipment of power systems - Part 2: Analogue comparison systems (IEC 60834-2:1993, modified)
  Entity: CEN CENELEC
  Subject: Industrial process measurement and control

• Norma Técnica HD 544 S1

  Title: Audio recording; PCM encoder/decoder system
  Entity: CEN CENELEC
  Subject: Audio systems

• Norma Técnica HD 546.2.1 S1

  Title: Telecontrol equipment and systems; part 2: operating conditions; section 1: environmental conditions and power supplies (IEC 60870-2-1:1987, modified)
  Entity: CEN CENELEC
  Subject: Telecontrol. Telemetering

• Norma Técnica HD 546.3 S1

  Title: Telecontrol equipment and systems; part 3: interfaces (electrical characteristics) (IEC 60870-3:1989)
  Entity: CEN CENELEC
  Subject: Telecontrol. Telemetering

• Norma Técnica HD 546.4 S1

  Title: Telecontrol equipment and systems; part 4: performance requirements (IEC 60870-4:1990)
  Entity: CEN CENELEC
  Subject: Telecontrol. Telemetering

• Norma Técnica HD 547 S1

  Title: Conductive clothing for live working at a nominal voltage up to 800 kV a.c.
  Entity: CEN CENELEC
  Subject: Protection against electric shock. Live working.

• Norma Técnica HD 548.3 S1

  Title: Instrument transformers; part 3: combined transformers (IEC 60044-3:1980)
  Entity: CEN CENELEC
  Subject: Measurement of electrical and magnetic quantities

• Norma Técnica HD 549 S1

  Title: Conference systems; electrical and audio requirements
  Entity: CEN CENELEC
  Subject: Other audio, video and audiovisual equipment

• Norma Técnica HD 550 S1

  Title: Mechanical structures for electronic equipments; terminology
  Entity: CEN CENELEC
  Subject: Electronics (Vocabularies)

• Norma Técnica HD 551 S1

  Title: Shipborne radar; operational and performance requirements; methods of test and required test results (IEC 60936:1988)
  Entity: CEN CENELEC
  Subject: Navigation and control equipment

• Norma Técnica HD 552 S1

  Title: Marine navigational equipments; general requirements; methods of testing and required test results
  Entity: CEN CENELEC
  Subject: Navigation and control equipment

• Norma Técnica HD 553 S1

  Title: Current transformers (IEC 60185:1987, modified)
  Entity: CEN CENELEC
  Subject: Rectifiers. Converters. Stabilized power supply

• Norma Técnica HD 553 S2

  Title: Current transformers (IEC 61985:1987 + A1:1990, modified)
  Entity: CEN CENELEC
  Subject: Rectifiers. Converters. Stabilized power supply

• Norma Técnica HD 554 S1

  Title: Voltage transformers (IEC 60186:1987 + A1:1988, modified)
  Entity: CEN CENELEC
  Subject: Rectifiers. Converters. Stabilized power supply

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