IEC 60076-1-2011 pdf free

07-18-2021 comment

IEC 60076-1-2011 pdf free.Power transformers – Part 1: General.
This part of IEC 60076 applies to three-phase and single-phase power transformers (including auto-transformers) with the exception of certain categories of small and special transformers such as:
— single-phase transformers with rated power less than 1 kVA and three-phase transformers less than 5 kVA;
— transformers, which have no windings with rated voltage higher than 1 000 V;
— instrument transformers;
— traction transformers mounted on rolling stock:
— starting transformers:
— testing transformers:
— welding transformers:
— explosion-proof and mining transformers:
— transformers for deep water (submerged) applications.
When IEC standards do not exist for such categories of transformers (in particular transformer having no winding exceeding 1000 V for industrial applications), this part of IEC 60076 may still be applicable either as a whole or in part.
This standard does not address the requirements that would make a transformer suitable for mounting in a position accessible to the general public.
For those categories of power transformers and reactors which have their own IEC standards. this part is applicable only to the extent in which it is specifically called up by cross-reference in the other standard Such standards exist for:
— reactors in general (lEG 60076-6);
— dry-type transformers (IEC 60076-11);
— self-protected transformers (IEC 60076-13);
— gas-filled power transformers (IEC 60076-15);
— transformers for wind turbine applications (IEC 60076-16):
— traction transformers and traction reactors (IEC 60310);
— converter transformers for industrial applications (IEC 61378-1);
— converter transformers for HVDC applications (IEC 61378-2).
At several places in this part it is specified or recommended that an agreement’ should be reached concerning alternative or additional technical solutions or procedures. Such agreement is made between the manufacturer and the purchaser. The matters should preferably be raised at an early stage and the agreements included in the contract specification.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60076-2, Power transformers — Part 2: Temperature rise for liquid-immersed transformers
IEC 60076-3:2000, Power transformers — Part 3: Insulation levels, dielectric tests and external clearances in air
IEC 60076-5:2006, Power transformers — Part 5: Ability to withstand short circuit
IEC 60076-10:2001, Power transformers — Part 10: Determination of sound levels
IEC 60076-11:2004. Power transformers — Part 11: Dry-type transformers
IEC 60137:2008, Insulated bushings for alternating voltages above 1 000 V
IEC 60214-1:2003, Tap-changers — Part 1: Performance requirements and test methods
IEC 60296:2003, Fluids for electrotechnical applications — Unused mineral insulating oils for transformers and switch gear
IEC 60721-3-4:1995, Classification of environmental conditions — Part 3: Classification of groups of environmental parameters and their Se verities — Section 4: Stationary use at nonweatherprotected locations
ISO 9001:2008. Quality management systems — Requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE Other terms use the meanings ascnbed to them in Ihe International Electrotechnical Vocabulary (1EV).
3.1 General power transformer
a static piece of apparatus with two or more windings which, by electromagnetic induction, transforms a system of alternating voltage and current into another system of voltage and current usually of different values and at the same frequency for the purpose of transmitting electrical power (IEC 60050-421:1990, 421-01-01, modified)
3.1.2 auto-transformer a transformer in which at least two windings have a common part (IEC 60050-421:1990, 421-01-11)
3.1.3 series transformer a transformer, other than an autotransformer, of which one winding is intended to be connected in series with a circuit in order to alter its voltage and/or shift its phase. The other winding is an energizing winding (IEC 60050-421:1990, 421-01-12, modifiedj
NOTE Series transformers were called booster transformers in earher editions of this standard.
3.1.4 liquid-immersed type transformer a transformer in which the magnetic circuit and windings are immersed in liquid
3.1.5 dry-type transformer a transformer in which the magnetic circuit and windings are not Immersed in an insulating liquid
(IEC 60050-421:1990, 421-01-161
3.1.6 liquid preservation system system in a liquid-filled transformer by which the thermal expansion of the liquid is accommodated.
NOTE Contact between the liquid and external air may sometimes be diminished or prevented
3.1.7 specified value
the value specified by the purchaser at the time of order
3.1.8 design value
the expected value given by the number of turns in the design in the case of turns ratio or calculated from the design in the case of impedance, no-load current or other parameters
3.1.9 highest voltage for equipment Urn applicable to a transformer winding
the highest r.m.s. phase-to-phase voltage in a three-phase system for which a transformer winding is designed in respect of its insulation.IEC 60076-1 pdf download.

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