Henan Energy Electric Equipment Co., Ltd. was established in 2011 and is an excellent and reliable power equipment manufacturer in China. The company mainly develops and produces oil-immersed transformers, dry-type transformers, box-type substations, high-voltage switches, and medium and low voltage complete sets of equipment. The equipment put into production and operation of the project advocates energy saving, intelligence, informatization, and mechanization. The company has established the Henan Triangle Energy-saving Transformer Engineering Technology Research Center, with 71 utility model patents and 15 invention patents. With years of accumulation in the transformer industry and strong technological innovation capabilities, HZEC products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa, and other regions, covering more than 40 countries.
Product Description
25X transformer oil is made of moderately refined low viscosity, low pour point, low sulfur content cycloalkyl base oil with high-quality antioxidant additives. It has the characteristics of rapid heat transfer, good oxidation stability, excellent electrical properties, etc. The product performance is stable and reliable, produced under strict quality control procedures, and the product resources are fixed.
Product Parameters
Item
|
GB 2536-2011
I-10ºC (General)
|
Test Method |
Value |
| China |
| LCSET/ºC |
-20 |
- |
- |
| Functional characteristics |
| Tilt point/ºC |
≤-30 |
GB/T 3535 |
<-35 |
| Kinematic viscosity,(40ºC),mm2/s |
≤12 |
GB/T 265 |
9.9 |
| Kinematic viscosity,(-10ºC),mm2/s |
≤1800 |
503 |
| Water content/(mg/kg) |
≤30 |
GB/T 7600 |
21 |
| Breakdown voltage / (kV) |
Unprocessed |
≥30 |
GB/T 507 |
69 |
| Density (20ºC)/(kg/m3) |
≤895 |
SH/T 0604 |
886.7 |
| Aniline point |
Report |
GB/T262 |
78 |
| Dielectric loss factor (90ºC) |
≤0.005 |
GB/T 5654 |
<0.0005 |
| Refining/Stability |
| Appearance |
Clear and transparent, without sediment |
Visual estimation |
Clear and transparent, without sediment |
| Acid value/(mgKOH/g) |
≤0.01 |
NB/SH/T 0836 |
<0.01 |
| Water-soluble acidic or alkaline |
None |
GB/T 259 |
None |
| Interfacial tension/(mN/m) |
≥40 |
GB/T 6541 |
46 |
| Total sulfur content (mass fraction)% |
≤0.15 |
SH/T 0689 |
0.002 |
| Corrosive sulfur |
None |
GB/T 259 |
None |
| Antioxidant additive content/% |
0.08-0.40 |
SH/T 0802 |
0.3 |
| 2-furfural content/(mg/kg) |
≤0.05 |
NB/SH/T 0812 |
<0.01 |
| Operating characteristics |
| Oxidation stability (120ºC, 500h) |
- |
NB/SH/T 0811
|
- |
| Total acid value/(mgKOH/g) |
≤0.3 |
0.15 |
| Oil sludge (mass fraction)/% |
≤0.05 |
0.02 |
| Dielectric loss factor (90ºC) |
≤0.05 |
GB/T 5654 |
0.024 |
| Gassing properties (mm3/min) |
Report |
NB/SH/T 0810 |
+38 |
| Charging tendency (ECT)/(uC/m3) |
Report |
DL/T 385 |
1 |
| Health, Safety and Environmental Features |
| Flash point (closed cup)/ºC |
≥135 |
GB/T 261 |
142 |
| Condensed ring aromatic hydrocarbons (PCA) content/% |
≤3 |
NB/SH/T 0838 |
1.5 |
| Polychlorinated biphenyls (PCB) content/(mg/kg) |
Not detected |
SH/T 0803 |
Not detected |
Main Features
1. Excellent electrical insulation performance, high breakdown voltage, small dielectric loss factor, effectively prevent discharge phenomenon and power loss under high voltage electric field, meet demanding insulation performance requirements;
2. Good thermal stability and oxidation stability, no hydrogen is generated under low heat, and acid and sludge formation can be prevented during use, extending the service life of electrical equipment and reducing maintenance costs;
3. Low viscosity, good low temperature performance, providing effective cooling and heat transfer, low temperature start-up performance and filtering performance;
4. The content of cycloalkane and aromatic hydrocarbons is appropriate to ensure the dissolution of sludge formed during the operation of electrical equipment, avoid damage to insulation materials and affect heat transfer;
5. Environmentally friendly, does not contain any polychlorinated biphenyls, does not contain DBDS corrosive sulfides, and has passed the following harsh sulfur corrosion methods: ASTMD1275B, IEC62535, DIN51353, avoiding corrosion of transformer metal insulation materials, and will not cause cuprous sulfide (CuS) to be deposited on the insulation paper to reduce electrical insulation performance, thereby reducing the potential for equipment failure.
Certifications
Audited Supplier 
25X transformer oil is made of moderately refined low viscosity, low pour point, low sulfur content cycloalkyl base oil with high-quality antioxidant additives. It has the characteristics of rapid heat transfer, good oxidation stability, excellent electrical properties, etc. The product performance is stable and reliable, produced under strict quality control procedures, and the product resources are fixed.
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