ANSI C29.9-2017 pdf free download – American National Standard for Wet Process Porcelain Insulators— Apparatus, Post Type.
8.1 General
Tests described in 8.2 shall be required only on insulators of new designs. Tests described in 8.3 shall be required on each lot of insulators. Tests described in 8.4 shall be made on each insulator. Electrical tests described in 8.2 shall be conducted on complete insulator assemblies.
8.2 Design Tests
8.2.1 Low-Frequency Wet Withstand One insulator shall be selected at random and tested in accordance with Clause 4.5 of ANSI C29.1 , Low- Frequency Wet Withstand Voltage Tests. If the insulator fails to meet the rated wet withstand value given in Table 1 or Table 2, the retest procedure of Clause 4.4 shall apply.
8.2.2 Critical Impulse Flashover, Positive One insulator shall be selected at random for the critical impulse flashover test, positive, and tested in accordance with Clause 4.7 of ANSI C29.1 , Impulse Flashover Voltage Tests. If the critical impulse flashover value of the insulator fails to equal or exceed 92 percent of the rated critical impulse flashover value given in Table 1 or Table 2, the retest procedure of Clause 4.4 shall apply.
8.2.3 Impulse Withstand One insulator shall be selected at random and tested in accordance with Clause 4.8 of ANSI C29.1 , Impulse Withstand Voltage Tests. If the insulator fails to meet the rated impulse withstand value given in Table 1 or Table 2, the retest procedure of Clause 4.4 shall apply.
8.2.4 Radio-Influence Voltage (RIV) One insulator shall be selected at random and tested in accordance with Clause 4.9 of ANSI C29.1 , Radio-Influence Voltage Tests. If the insulator fails to meet the requirements given in the applicable table, the retest procedure of Clause 4.4 shall apply.
8.2.5 Thermal Shock One insulator shall be selected at random and tested for 1 0 complete cycles in accordance with Clause 5.5 of ANSI C29.1 , Thermal Test. For multiunit insulators, one of each type of unit in the stack shall be tested. The temperature of the hot water bath shall be approximately 1 50°F (66°C), and the temperature of the cold water bath shall be approximately 39°F (4°C). At the end of the tenth cycle, the test specimens shall be checked for electrical soundness. If the insulator or one of the insulator units fails to meet the requirements for electrical soundness, the retest procedure of Clause 4.4 shall apply.
8.2.6 Compression Strength Three insulators shall be selected at random and tested in accordance with Clause 5.1 .4.4 of ANSI C29.1 , Compression Strength. For multiunit insulators, three of each type of unit in the stack shall be tested. If any insulator or any insulator unit fails to equal or exceed the strength requirement in Table 1 or Table 2 as appropriate (or a higher strength requirement if so indicated on the manufacturer’s drawing), the retest procedure of Clause 4.4 shall apply.
8.2.7 Torsional Strength Three insulators shall be selected at random and tested in accordance with Clause 5.1 .4.2 of ANSI C29.1 , Torsional Strength. For multiunit insulators, one of each type of unit in the stack shall be tested. If any insulator or any insulator unit fails to equal or exceed the strength requirement in Table 1 or Table 2 as appropriate (or a higher strength requirement if so indicated on the manufacturer’s drawing), the retest procedure of Clause 4.4 shall apply.ANSI C29.9 pdf download.