Naphthenic Transformer Oil U-40 Model
Transformer oil has a large specific heat, commonly used as a coolant. When the transformer is running, the oil near the core and windings is heated by the expansion and rise, through the oil convection up and down, the heat can be dispersed. In the oil circuit breaker and transformer on-load voltage regulator switch, contact switching will produce arc. Transformer oil can improve the arc extinguishing performance of the medium, so that the arc is quickly extinguished.
Product Details：Naphthenic Transformer Oil U-40 Model
Transformer oil possesses outstanding thermal stability, effectively regulating the internal temperature of equipment during prolonged operation, thereby ensuring its reliable performance. As electrical equipment operates for extended periods, it generates significant internal heat. Transformer oil, serving as a coolant, circulates through the system, dissipating heat through the radiator to maintain equipment's optimal operating temperature.
PARAMETER：
Sports Event | IEC60296:2020 TVAI (LCSET-40℃) Quality indicators | Typical properties | Test Methods |
Functional characteristics | |||
Pour Point/°C | ≯-50 | -63 | ISO 3016 |
Kinematic viscosity (40°C)/(mm²/s) | ≯12 | 7.0 | ISO 3104 |
Kinematic viscosity (-40°C)/(mm²/s) | ≯2500 | 1736 | IEC 61868 |
Water content/(mg/kg) | ≮30 | 68 | IEC 60814 |
Breakdown voltage/kV | - | IEC 60156 | |
--Untreated oil | ≮30 | 40-70 | |
--Treated oil | ≮70 | >70 | |
Density (20°C)/(kg/m³) | ≯895 | 865 | ISO 12185 |
Dielectric loss factor (90°C) | ≯0.005 | 0.0005 | IEC 60247 |
Refining/stabilizing properties | |||
saturation (color theory) | <0.5 | <0.5 | ISO 2049 |
exterior condition | clear and transparent | Clear and transparent, no precipitation | visual assessment |
Acid value/(mgKOH/g) | ≯0.01 | <0.01 | IEC 62021 |
Interfacial tension/(mN/m) | ≮43 | 47 | IEC 62961 |
Total sulfur content/% | ≯0.05 | 0.003 | ISO 14596 |
corrosive sulfur | non-corrosive | non-corrosive | DIN 51353 |
Potentially corrosive sulfur | non-corrosive | non-corrosive | IEC62535 |
DBDS/(mg/kg) | Not detectable (<5) | undetectable | IEC 62697-1 |
Antioxidant content/% | 0.08~0.4 | 0.37 | IEC 60666 |
Metal passivator/(mg/kg) | Not detectable (<5) | undetectable | IEC 60666 |
2-Furfural content and related substances (single component) (mg/kg) | Not detectable (<0.05) | undetectable | IEC 61198 |
Gas production characteristics (under thermal oxidation)/uI/L) | Hydrogen ≯ 50 | 9 | Appendix A4 Methodology (air-saturated, containing copper) |
Methane ≯ 50 | 1 | ||
Ethane ≯ 50 | 0.2 | ||
Operational characteristics | |||
Chlorine stability (500h) | - | - | IEC 61125 |
--Total acid value (mg (KOH)/g) | ≯0.3 | 0.02 | |
-- Oil sludge/% | ≯0.05 | <0.01 | |
--Dielectric loss factor (90°C) | ≯0.050 | 0.025 | IEC 60247 |
HSE Characteristics | |||
Flash point (closed)/°C | ≮135 | 145 | ISO 2719 |
PCA content/% | <3 | 1.2 | IP 346 |
Polyoxybiphenyl (PCB) content/(mg/kg) | Not detectable (<2) | undetectable | IEC 61619 |
1. Transformer Oil Quality Criteria
The defining characteristics of transformer oil quality stem from the intricate structure of its base components and the depth of its refining. In service, transformer oil must uphold two cardinal properties: oxidation stability and fluid dynamics. Prior to recent developments, Chinese practices labeled oil utilized in 500 kV ultra-high voltage transformers as "ultra-high voltage transformer oil," eventually transitioning to a system that differentiates oil grades by voltage class.
Internationally, the most recent transformer oil standards are classified based on parameters like the oil's base structure and its resistance to oxidation. With the enactment of the new national standard GB2536-2011, China has unified its transformer oil classifications and grades with global norms. The table below illustrates the correlation between the grades stipulated in the previous GB 2536-1990 standard and the current GB 2536-2011 standard.
2. Navigating Challenges
The global energy picture is evolving towards sustainable solutions due to dwindling resources and energy security concerns. Transformer management stands at the forefront of this transformation, with environmentally friendly approaches and smart grid technologies gaining momentum.
However, the power sector confronts hurdles stemming from aging infrastructure and operational strains. Transformers, specifically pad-mounted and three-phase models, are vital components in power distribution, transmission, and generation. Investments in industrial power infrastructure are essential to accommodate the demands of power-intensive operations.
The sector faces challenges related to power efficiency, reliability, and supply, necessitating the prioritization of power needs and advantages through tailored solutions, portfolios, and initiatives. Electrical energy is efficiently conveyed to consumers via robust power networks and supply systems, ensuring optimal power status and economy.
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FAQ：
Q: Do your products comply with international quality standards?
A: Yes, we strictly adhere to the ISO 9001 quality management system and ensure that all our products comply with international and regional quality standards such as REACH, RoHS, FDA, etc. to meet the needs of our customers worldwide.
Q: Are your products certified for safety?
A: Yes, our products have passed a number of international safety certifications including UL, CE, TüV SüD, etc. to prove their compliance with international safety standards.
Q: What is the delivery period?
A: Delivery period varies depending on product type, order quantity and transportation method. Generally, we will arrange production as soon as possible after receiving the order and complete delivery within the agreed time. Please check with our sales representatives for specific delivery dates.
