IEC 60076-24-2020 pdf free.Power transformers – Part 24: Specification of voltage regulating distribution transformers (VRDT).
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 60068-2-1. Environmental testing — Part 2-1: Tests — Test A: Cold
IEC 60068-2-2. Environmental testing — Part 2-2: Tests — Test B: Dry heat
IEC 60068-2-11, Basic environmental testing procedures — Part 2-11: Tests — Test Ka: Salt mist
IEC 60068-2-30, Environmental testing — Part 2-30: Tests — Test Db: Damp heat, cyclic (12 h + 12 h cycle)
IEC 60068-2-78, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state
IEC 60076-1, Power transformers Part 1: General
IEC 60076-2, Power transformers — Part 2: Temperature rise for liquid-immersed transformers
IEC 60076-5, Power transformers — Part 5: Ability to withstand short circuit
IEC 60076-7, Power transformers — Part 7: Loading guide for mineral-oil-immersed power transformers
IEC 60076-10, Power transformers — Part 10: Determination of sound levels IEC 60076-11, Power transformers — Part 11: Dry-type transformers
IEC 61000-6-4, Electromagnetic compatibility (EMC) — Part 6-4: Generic standards — Emission standard for industrial environments
IEC 61000-6-5, Electromagnetic compatibility (EMC) — Part 6.5: Generic standards — Immunity for equipment used in power station and substation environment
IEC 61010-1, Safety requirements for electrical equipment for measurement, control, and laboratory use — Part 1: General requirements
IEC 61010-2.201, Safety requirements for electrical equipment for measurement, control, and laboratory use — Part 2-201: Particular requirements for control equipment
EN 50708, Power transformers — Additional European requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60076-1. EN 50708, and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http:I/www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
voltage regulating distribution transformer
VRDT
transformer equipped with components to control primary or secondary voltage for on-load voltage regulation purposes within the scope of this document
3.2 regulation voltage
ratio lid/UN or 100 lid/UN (percentage) where: UN is the rated voltage of the transformer: Ud is the voltage which would be developed at no-load at the terminals of the transformer, connected on the tapping concerned, by applying rated voltage to an untapped winding related to
IEC 60214
3.3 regulation range
variation range of the regulation voltage expressed as a percentage, compared with value K lOON.IEC 60076-24 pdf free download.