BS EN 60076-1:1997:2004 Edition
$167.15
Power transformers – General
| Published By | Publication Date | Number of Pages |
| BSI | 2004 | 44 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | National foreword |
| 4 | Foreword Foreword to amendment A11 Foreword to amendment A12 Foreword to amendment A1 |
| 5 | Contents |
| 7 | 1 Scope and service conditions 1.1 Scope 1.2 Service conditions |
| 8 | 2 Normative references |
| 9 | 3 Definitions 3.1 General 3.1.1 power transformer 3.1.2 auto-transformer 3.1.3 booster transformer 3.1.4 oil-Immersed type transformer 3.1.5 dry-type transformer 3.1.6 oil preservation system 3.2 Terminals and neutral point 3.2.1 terminal 3.2.2 line terminal |
| 10 | 3.2.3 neutral terminal 3.2.4 neutral point 3.2.5 corresponding terminals 3.3 Windings 3.3.1 winding 3.3.2 tapped winding 3.3.3 phase winding 3.3.4 high-voltage winding 3.3.5 low-voltage winding 3.3.6 intermediate-voltage winding |
| 11 | 3.3.7 auxiliary winding 3.3.8 stabilizing winding 3.3.9 common winding 3.3.10 series winding 3.3.11 energizing winding 3.4 Rating 3.4.1 rating 3.4.2 rated quantities 3.4.3 rated voltage of a winding 3.4.4 rated voltage ratio |
| 12 | 3.4.5 rated frequency 3.4.6 rated power 3.4.7 rated current 3.5 Tappings 3.5.1 tapping 3.5.2 principal tapping 3.5.3 tapping factor (corresponding to a given tapping) |
| 13 | 3.5.4 plus tapping 3.5.5 minus tapping 3.5.6 tapping step 3.5.7 tapping range 3.5.8 tapping voltage ratio (of a pair of windings) 3.5.9 tapping duty 3.5.10 tapping quantities 3.5.11 full-power tapping 3.5.12 reduced-power tapping |
| 14 | 3.5.13 on-load tap-changer 3.6 Losses and no-load current 3.6.1 no-load loss 3.6.2 no-load current 3.6.3 load loss 3.6.4 total losses 3.6.5 total harmonic distortion factor: |
| 15 | 3.7 Short-circuit impedance and voltage drop 3.7.1 short-circuit Impedance of a pair of windings 3.7.2 voltage drop or rise for a specified load condition 3.7.3 zero-sequence impedance (of a three-phase winding) 3.8 temperature rise |
| 16 | 3.9 insulation 3.10 Connections 3.10.1 star connection (Y-connection) 3.10.2 delta connection (D-connection) 3.10.3 open-delta connection 3.10.4 zigzag connection (Z-connection) 3.10.5 open windings 3.10.6 phase displacement of a three-phase winding 3.10.7 connection symbol |
| 17 | 3.11 Kinds of tests 3.11.1 routine test 3.11.2 type test 3.11.3 special test 3.12 Meteorological data with respect to cooling 3.12.1 monthly average temperature 3.12.2 yearly average temperature 4 Rating 4.1 Rated power |
| 18 | 4.2 Loading cycle 4.3 Preferred values of rated power 4.4 Operation at higher than rated voltage and/or at disturbed frequency 5 Requirements for transformers having a tapped winding 5.1 General — Notation of tapping range |
| 19 | 5.2 Tapping voltage — Tapping current — Standard categories of tapping voltage variation — Maximu… 5.3 Tapping power — Full-power tappings — Reduced-power tappings |
| 20 | Figure 1a – Constant flux voltage variation CFVV Optional maximum current tapping shown 5.4 Specification of tappings in enquiry and order |
| 21 | Figure 1b – Variable flux voltage variation VFVV Optional maximum current tapping shown 5.5 Specification of short-circuit impedance |
| 22 | Figure 1c – Combined voltage variation CbVV 5.6 Load loss and temperature rise |
| 23 | 6 Connection and phase displacement symbols for three-phase transformers |
| 24 | Figure 2 – Illustration of “clock number” notation — Three examples |
| 25 | 7 Rating plates 7.1 Information to be given in all cases 7.2 Additional information to be given when applicable |
| 26 | 8 Miscellaneous requirements 8.1 Dimensioning of neutral connection 8.2 Oil preservation system 8.3 Load rejection on generator transformers 9 Tolerances |
| 27 | 10 Tests 10.1 General requirements for routine, type and special tests |
| 28 | Table 1 – Tolerances |
| 29 | 10.2 Measurement of winding resistance |
| 30 | 10.3 Measurement of voltage ratio and check of phase displacement 10.4 Measurement of short-circuit impedance and load loss 10.5 Measurement of no-load loss and current |
| 31 | 10.6 Measurement of the harmonics of the no-load current 10.7 Measurement of zero-sequence impedance(s) on three-phase transformers |
| 32 | 10.8 Tests on on-load tap-changers 11 Electromagnetic compatibility (EMC) |
| 33 | Annex A (normative) Information required with enquiry and order A.1 Rating and general data A.1.1 Normal information A.1.2 Special information |
| 34 | A.2 Parallel operation |
| 35 | Annex B (informative) Examples of specifications for transformers with tappings |
| 36 | Annex C (informative) Specification of short-circuit impedance by boundaries Figure C.1 – Example of specification of short-circuit impedance by boundaries |
| 37 | Annex D (informative) Three-phase transformer connections Figure D.1 – Common connections |
| 38 | Figure D.2 – Additional connections |
| 39 | Figure D.3 – Designation of connections of three-phase auto-transformers by connection symbols. Auto-transform… Figure D.4 – Example of three single-phase transformers connected to form a three-phase bank�(connection symbo… |
| 40 | Annex E (normative) Temperature correction of load loss Annex F (informative) Bibliography |
| 41 | Annex ZA (normative) Normative references to international publications with their corresponding European … |
| 42 | Annex ZB (informative) Installation and safety of a liquid immersed transformer ZB.1 Manuals ZB.2 Installation ZB.2.1 General ZB.2.2 Intrinsic safety |
| 43 | ZB.2.3 Installation precautions |
