IEC 60230-2021 pdf free download – Impulse tests on cables and their accessories.
This document defines the procedure for carrying out withstand lightning and switchingimpulse tests and withstand superimposed impulse test on cables and their accessories.
This document applies solely to the methods of carrying out the tests as such, independentlyof the problem of selecting the test levels to be specified. The voltages pertaining to thesystem on which cables and accessories are to be used are given in IEC 60183 or in therelevant product standard.
This document specifies the following requirements:
the characteristics and state of the test installation and those parts of the procedure whichare common to withstand tests and tests above the withstand level;
the procedure for carrying out withstand lightning and switching impulse tests and superimposed impulse test;
the procedure for carrying out tests above the withstand level which is intended for research purposes.
2Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document.For dated references,only the editioncited applies. For undated references, the latest edition of the referenced document (includingany amendments) applies.
IEC 60060-1:2010，High-voltage test techniques – Part 1: General definitions and testrequirements
3Terms and definitions
For the purposes of this document, the terms and definitions given in the relevant productstandards and the following apply.
ISo and lEC maintain terminological databases for use in standardization at the followingaddresses:
IEC Electropedia: available at http://www.electropedia.org
Iso Online browsing platform: available at http://www.iso.orglobp
3.1
superimposed impulse voltage
impulse voltage applied to a test object which is at the same time energized by a DC voltage
Note 1 to entry: The superimposed impulse voltage falls under the definition of composite voltage given inIEC 60060-1:2010.9.2.
4 Characteristics of the test object to be subjected to the tests
The test object shall have been previously subjected to the test protocol as required by therelevant lEC product standards.
lf not specified in the reference lEC product standards, the following conditions shall bemaintained:
. lf the test object is not intended to include any other accessory, the length of the sampletaken shall be such that the length of free cable between the terminations is at least 5 m.. Where one joint is included in the test object， the minimum length of free cable, between
the joint and terminations shall be 5 m. Where more than one joint is included, the samerequirement shall be observed and in addition there shall be a minimum length of 3 m offree cable between successive joints.
5 State of the test object to be subjected to the test
The test object shall be maintained under the following conditions..Pressure conditions, if any:
For gas-pressure and oil-filled cables,the pressure shall be adjusted in accordance withthe relevant lEC standard.
Temperature conditions:
The temperature conditions and the method of temperature measurement shall be asdescribed in the relevant IEC standard, but other methods of temperature measurementmay be used by agreement between the purchaser and the manufacturer.
6 Lightning impulse voltage
The peak voltage level of the lightning impulse is specified in the relevant product standard orcontractual agreements. The lightning impulse voltage to be applied shall be a standardlightning-impulse voltage as specified in lIEC 60060-1 with the exception that the front time Tshall be between 1 us and 5 us.
7 Switching impulse voltage
The peak voltage level of the switching impulse is specified in the relevant product standard.
The switching impulse voltage to be applied shall be a standard switching impulse voltage asspecified in lEc 6o06o-1.
8 superimposed impulse voltage test
8.1General
The superimposed impulse voltage test shall be carried out on HVDC cable systems. Thepeak voltage level of the switching impulse is specified in the relevant product standard.IEC 60230 pdf download.