- Transformers
IEC 60296 Type A
Shell Diala S4 ZX-I
Premium inhibited electrical insulating oil, virtually sulphur-free, for power transformers
Business customers only. We sell wholesale, invoiced to registered companies.
Standards & approvals
GB 2536-2025
Chinese standard for insulating (transformer) oil
Chinese national standard GB 2536 for mineral insulating oils used in transformers.
OECD 301B
OECD 301B biodegradability above 60 %
OECD test measuring carbon dioxide evolved over 28 days; above 60 % counts as "readily biodegradable".
IEC 60296 Type A
IEC 60296, Type A — uninhibited transformer oil
Type A of IEC 60296: a mineral insulating oil for transformers without added oxidation inhibitor.
Also listed
Specifications
- Brand
- Shell
- Range
- Shell Diala
- Category
- Transformer & dielectric oils
- Manufacturer code
- 001E8701
- Availability
- On request
Typical characteristics
| Property | Typical value | Method |
|---|---|---|
| Appearance | Indeplineste | IEC 60296 |
| Density at 20 °Ckg/m3 | 805 | ISO 3675 |
| Kinematic viscosity @40°Cmm2/s | 9.8 | ISO 3104 |
| Kinematic viscosity @-30°Cmm2/s | 438 | ISO 3104 |
| Flash point°C | 191 | ISO 2719 |
| Pour point°C | -45 | ISO 3016 |
| Neutralisation value mg | <0.01 | IEC 62021-1 |
| Interfacial Tension @25°C mNm | 51 | ASTM D971 |
| Colour | L0.5 | ISO 2049 |
| Total sulphur content mg/kg | < 10 | ASTM D5185 |
| Corrosive sulphur | necoroziv | DIN 51353 |
| Potentially corrosive sulphur | necoroziv | IEC 62535 |
| Corrosive sulphur | necoroziv | ASTM D1275 B |
| Breakdown voltage- kV | 50 - 60 | IEC 60156 |
| Breakdown voltage - kV | 78 | IEC 60156 |
| Dielectric dissipation factor at 90 °C DDF | 0.001 | IEC 60247 |
| Oxidation stability 500 hours / | Pass | IEC 61125 C Section |
| Total acidity mg KOH/g | 0.02 | IEC 62021-1 |
| Residue%m | 0.01 | IEC 61125 C |
| Dielectric dissipation factor | 0.001 | IEC 61125 C |
| Breakdown voltage - kV | 14 | IEC 60156 |
| Water content (bulk) mg/kg | 10 | IEC 60814 |
| 2-furfural and related compounds content, mg/kg | indeplineste | IEC 61198 |
| DBDS content mg/kg | indeplineste | IEC 62697-1 |
| Metal passivator additives mg/kg | indeplineste | IEC 60666 |
| Oxidation inhibitor content % mass | 0.2 | |
| PCA content % mass | indeplineste | IP346 |
| PCB content mg/kg | indeplineste | IEC 61619 |
Complete documentation
Manufacturer's description
Shell Diala S4 ZX-I is a biodegradable electrical insulating oil from Shell designed to meet the challenges presented by the latest power transformers. It offers an extended oil life with zero sulphur content. Shell Diala S4 ZX-I is manufactured from zero-sulphur base oils produced using Shell's GTL (gas-to-liquid) technology. These base oils offer a high degree of compositional consistency and have excellent antioxidant response. In addition, they are available globally and are free from PCBs, DBDS and passivators. Shell Diala S4 ZX-I passes both the established and the new industry copper corrosion tests.
Applications
- Premium biodegradable electrical insulating oil designed for the latest power transformers, offering an extended oil life and zero sulphur content.
Performance & benefits
- Extended oil lifeShell Diala S4 ZX-I is a fully inhibited oil offering outstanding oxidation performance and an extended oil life. Shell Diala S4 ZX-I is also suitable for use in highly loaded applications.
- Transformer protectionShell Diala S4 ZX-I is manufactured from a zero-sulphur* base oil, making it intrinsically non-corrosive towards copper without the need for passivation or other additives. Shell Diala S4 ZX-I passes all the relevant copper corrosion tests, namely DIN 51353 (Silver Strip Test), ASTM D1275, and also the latest, more severe tests: IEC 62535 and ASTM D1275B. *Sulphur content below the 1 ppm detection limit of ASTM D5185
- System efficiencyThe oil's good low-temperature properties ensure adequate heat transfer inside the transformer, starting from even the lowest temperatures. Shell Diala S4 ZX-I is specially dried and handled to achieve a low water content and maintain a high breakdown voltage at the point of delivery. This allows it to be used in many applications without further treatment. The need for further drying and treatment should be assessed according to the application and the OEM specifications.
- Biodegradable according to OECD 301BShell Diala S4 ZX-I exceeds 60% biodegradation in the OECD 301B test after 28 days.
- IEC 60296 (Edition 5, year 2020); Type A, fully inhibited, high-grade oil
- IEC 60296 Ed4 (2012): Table 2 Transformer Oil (I) (Inhibited oil) Section 7.1 ("Higher oxidation stability and low sulphur content")
Fits
Alternatives and similar products
Equivalents
Shared standards: IEC 60296 Type A
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IEC 60296 Type A
Shared standards: IEC 60296 Type A
Shell Diala S4 ZX-I (EU-OEM)
Premium inhibited electrical insulating oil, virtually sulphur-free, for power transformers
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IEC 60296 Type A
Shared standards: IEC 60296 Type A
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