Scope
This standard specifies the terms and definitions, classification and marking, requirements and test methods, inspection rules and markings, packaging, transportation, and storage of unused mineral insulating oils This standard applies to unused mineral insulating oils containing and without additives obtained from petroleum distillates as raw materials for transformers, switches, and similar electrical equipment that require oil as insulation and heat transfer media. The oil used for generators can refer to this standard This standard does not include mineral insulating oils made from recycled oil This standard does not apply to mineral insulating oils used as impregnating agents in cables or capacitors Note: Oils that meet the requirements of this standard, have the same category, and do not contain any additives (see 3.3) are considered compatible and can be mixed in any proportion This may not necessarily apply to oils containing additives. When users wish to mix oil containing additives, it is recommended to conduct an inspection first to ensure that the mixture meets the requirements of this standard
Normative references (partial)
The following documents are essential for the application of this document.
. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this documentGB/T 259 Petroleum Products - Determination of Water Soluble Acids and Bases
GB/T 261- Determination of Flash Point - Pensky-Marten Closed Cup Method (GB/T 261-2008, ISO 2719:2002, MOD)
GB/T 262 Petroleum Products - Determination of Aniline Point (GB/T 262-1988, neq ISO 2977:1974)
GB/T 265 Petroleum Products - Determination of Kinematic Viscosity and Calculation of Dynamic Viscosity
GB/T 507 Insulating Oil - Determination of Breakdown Voltage (GB/T 507-2002, eqv IEC 60156:1995)GB/T 511 Petroleum Products and Additives - Determination of Mechanical Impurities (Gravimetric Method)
GB 1094,1 Power Transformers - Part 1: General (GB 1094.1-1996, eqv IEC 60076.1:1993)
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
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1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
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4. Free initial testing, with no testing fees charged
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6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China