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ASTM D2900-90(1997)e1
Standard Test Method for Accelerated Life Test of Electrical Grade Magnesium Oxide as Used in Sheathed-Type Electric Heating Elements (Withdrawn 2003) (Includes all amendments And changes 8/16/2017).
Automaticky preložený názov:
Štandardná skúšobná metóda pre Accelerated Life Test elektrotechniky stupňa oxid horečnatý , ako je používaný v opláštené - Type Elektrické vykurovacie telesá ( Withdrawn 2003 )
NORMA vydaná dňa 10.9.1997
Informácie o norme:
Označenie normy: ASTM D2900-90(1997)e1
Poznámka: NEPLATNÁ
Dátum vydania normy: 10.9.1997
Kód tovaru: NS-21906
Počet strán: 4
Približná hmotnosť: 12 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Anotácia textu normy ASTM D2900-90(1997)e1 :
Keywords:
accelerated life, electrical grade, electrical heating elements, magnesium oxide, sheathed type, ICS Number Code 71.060.20 (Oxides)
Doplňujúce informácie
| 1. Scope |
|
1.1 This test method covers the accelerated life testing of electrical grade magnesium oxide (MgO) under conditions involving thermal cycling to an elevated temperature. The test determines both the rate at which electrical insulation impedance (Note 1) or test current through the insulation changes with time and the time span resulting in complete failure of a test cell incorporating the sample under test. Note 1-At test temperatures, capacitive and inductive reactance are negligible, and therefore impedance values are considered essentially resistive.1.2 This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific safety precaution, see 9.4.1. 1.3 The values stated in acceptable metric units are to be regarded as the standard. |
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