IEC 60660:1999 pdf download – Insulators一 Tests on indoor post insulators of organic material for systems with nominal voltages greater than 1 000 V up to but not including 300 kV

IEC 60660:1999 pdf download – Insulators一 Tests on indoor post insulators of organic material for systems with nominal voltages greater than 1 000 V up to but not including 300 kV.
IEC 60660 is applicable to post insulators of organic material for indoor service in electrical installations or equipment operating in air at atmospheric pressure on alternating current with a nominal voltage greater than 1 000 V up to. but not Including. 300 kV. as defined by range I of IEC 60071-I, and a frequency not greater than 100 Hz Composite insulators are not covered by this standard.
The object of this standard is
— to define the terms used:
— to define electrical and mechanical characteristics of post insulators of organic material and to prescribe the conditions under which the specified values of these characteristics are verified;
— to prescribe methods of testing;
— to prescribe acceptance criteria.
This standard does not give numerical values for insulator characteristics: nor does It deal with a choice of insulators for specific operating conditions. IEC 60273 specifies numerical values for electrical and mechanical characteristics and gives the dimensions necessary for interchangeability of post insulators,
1.2 Normative references
The following normative documents contain provisions which, through reference In this text. constitute provisions of this part of the ISOIEC Directives. For dated references, subsequent amendments to. or revisions of. any of these publications do not apply. However, parties to agreements based on this part of the ISO/IEC Directives are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60050(471 ):1984, International Electrotechnical Vocabulary (1EV) — Chapter 471:
Insulators
IEC 60060-I. High-voltage test techniques — Part 1: General delinitions and test requirements
IEC 60071-1. insulation co-ordination — Part 1: Definitions, principles and rules
IEC 60270. Partial discharge measurements
IEC 60273, Characteristics of indoor and outdoor post insulators for systems with nominal voltages greater than 1 000 V
IEC 60587, Test method for evaluating resistance to tracking and erosion of electrical insulating materials used under severe ambient conditions
IEC 60695-11-10:1999, Fire hazard testing — Part l1•lO: Test flames — 50 W horizontal arid vertical flame test methods
IEC 60932, Additional requirements for enclosed switchgear and controlgear from 1 kV to 72,51W to be used in severe climatic conditions
ISO 90001. Quality management and quality assurance standards — Part 1: Guidelines for selection and use
ISO 9002, Quality systems — Model for quality assurance in production, installation and servicing
1.3 DefInItions
For the purpose of this standard, the following definitions apply, together with those in
lEG 60050(471)
NOTE — Th. detinilions regarding lest voltages ax. given lot convenience. For additional details, see IEC 80080-I.
1.3.1
post insulator of organic material
post insulator Intended to give rigid support to a live part which is to be insulated from earth and from another live part. The whole or part of Ihe material composing the post insulator consists of organic materials, I.e. of material pertaining to the chemistry of the compounds produced from carbon or to the chemistry of the compounds produced from carbon and silicon. These organic materials may be used alone or in conpunction with other materials (mineral or organic) as fillers, reinforcements, etc.
1.3.2
indoor post insulator
a post insulator not intended to be exposed to outdoor atmospheric conditions. For indoor installations subject to excessive condensation, outdoor post insulators or special indoor post Insulators may be used
(1EV 471-04-04, modified)
1.3.3
design category
post insulators of organic materials are divided into two different design categories according to their construction. The design categories covered by this standard are:
Design category A
Cylindrical post insulators with internal metal fillings in which the length of the shortest puncture path through solid insulating material is equal to or greater than one-third the external arcing distance between the metal fittings
Design category B
Cylindrical post insulators with internal metal fittings in which the length of the shortest puncture path through solid insulating material is less than one-third the external arcing distance between the metal fittings.