IEC 60779:2020 pdf free download

IEC 60779:2020 pdf free download Installations for electroheating and electromagnetic processing – Test methods for electroslag remelting furnaces
1 Scope
Clause 1 of IEC 60398:2015 is replaced by the following.Replacement:
This International Standard specifies the test procedures,conditions and methods fordetermining the main performance parameters and operational characteristics of electroslagremelting furnaces.
Measurements and tests that are solely used for the verification of safety requirements of theinstallations are outside the scope of this document and are covered by iEC 60519-1 andIEC 60519-8.
This document applies to industrial electroslag remelting furnaces, the rated capacity of whichis equal to, or greater than,50 kg.
This document is applicable to industrial electroslag remelting furnaces having one or moreelectrodes and having different melting power supplies，such as alternating current,directcurrent,or low-frequency current.
This document includes the concept and material on energy efficiency dealing with the electricaland processing parts of the installations,as well as the overall performance.
2Normative references
Clause 2 of lEC 60398:2015 is applicable except as follows.
Replacement:
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.For undated ‘references,the latest edition of the referenced document (including anyamendments) applies.
Modification:
Delete the footnotes.
Additions:
IEC 60398:2015,Installations for electroheating and electromagnetic processing – Generalperformance test methods
IEC 60519-8,Safety in installations for electroheating and electromagnetic processing – Part 8:;Particular requirements for electroslag remelting furnaces
IEc 60676:2011, Industrial electroheating equipment – Test methods for direct arc furnaces
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60398:201 5 as well as the following apply.
3.1 General
Additions:
3.1.1 01
electroheating installation with an electroslag remelting furnace
complete assembly of electroheating equipment and electrical and mechanical accessories necessary for operation and utilization of an electroslag remelting furnace
3.1.1 02
power of an electroheating installation
apparent power S (in kVA) or active power P (in kW) measured at the input of the supply line
3.1.1 03
power factor of an electroheating installation
cosφ
ratio of the active power to the apparent power measured at the input of the supply line
3.1.1 04
on-load voltage of an electroslag remelting furnace
voltage measured between two points, which, depending on the type of a furnace, are either the base plate, the electrode clamping device(s) bringing the melting electrical current to the consumable electrode(s)/stub(s), or the point of common connection of the multiple return conductors
3.1.1 05
rated furnace frequency
f n
value corresponding to the rated furnace current, if the furnace is built for a frequency range
Note 1 to entry: The rated furnace frequency is expressed in Hz.