ANSI C29.9:2017 pdf download.Wet Process Porcelain Insulators–Apparatus, Post Type.
ANSI C29.9 covers outdoor high-voltage post type apparatus insulators made of wet-process porcelain and used in the transmission and distribution of electrical energy.
Section 2 Referenced Standards
2.1 American National Standards
ANSI C29.9 is intended for use in conjunction with the latest approved revision of the following American National Standard.
ANSI/N EMA C29.l Test Methods for Electrical Power Insulators
2.2 Other Standards
ASTM Al 53/Al 53M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
ASTM Dl 535 Standard Practice for Specifying Color by the Munsell System
Section 3 Definitions
3.1
See Section 2 of ANSI C29.1 Test Methods for Electrical Power Insulators for definitions of terms.
3.2
In ANSI C29.9, the word “insulator” shall refer to a unit or to an assembly of two or more units.
3.3
The technical reference numbers appearing in tables are a widely used and recognized identification series for apparatus insulator units or assemblies (stacks).
3.4
Wet-process porcelain is porcelain produced by intimately mixing all raw materials in an excess of water to begin the production process.
Section 4 General
4.1 Insulators shall conform in all respects to the requirements hereinafter stated. The text and figures supplement each other and shall be considered part of ANSI C29.9.
4.2 Some insulators are tapered and may contain units that have certain characteristics whose strengths exceed those given in tables. Each unit shall comply with the manufacturer’s strength requirements.
4.3 Manufacturer’s drawings, if furnished, shall show the outline of the insulators, together with all pertinent dimensions. Any variations in these dimensions due to manufacturing tolerances shall be indicated.
4.4 When specified in the clauses below, the following retest procedure applies: If only one insulator or metal part fails, or in case the average value fails to comply with the applicable rating, a new sample equal to twice the quantity originally submitted to that test shall be subjected to retesting. If two or more insulators or metal parts fail to comply with the initial test, or if any failure occurs during the retesting, the complete lot is considered as not complying with the requirements of ANSI C29.9.ANSI C29.9 pdf download.