Shell Diala S3 ZX-I Dried is a premium inhibited electrical insulating oil with ultra-low sulphur content, specially dried to deliver high breakdown voltage, superior oxidation stability, and excellent low-temperature properties for critical transformer and high-voltage equipment applications.
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Shell Diala S3 ZX-I Dried

Old product name: Shell Diala DX Dried

Shell Diala S3 ZX-I Dried is a premium inhibited electrical insulating oil with ultra-low sulphur content, specially dried to deliver high breakdown voltage, superior oxidation stability, and excellent low-temperature properties for critical transformer and high-voltage equipment applications.

Category:

Shell Diala S3 ZX-I Dried

( Previously named: Shell Diala DX Dried)

Premium inhibited electrical insulating oil for power transformers and electrical systems

  • Formulated from ultra-low sulphur mineral oils to ensure intrinsic non-corrosive properties

  • Fully inhibited formulation delivers exceptional oxidation stability and long service life

  • Specially dried and filtered to exceed industry-standard dielectric strength at delivery

  • Excellent low-temperature performance with pour point as low as –60 °C

  • Suitable for use in transformers, shunt reactors, circuit breakers, and switchgear

  • Complies with copper corrosion test standards DIN 51353, IEC 62535, and ASTM D1275B

  • Formerly known as: Shell Diala DX Dried

Global Product Code: 001D8376



Application:

Shell Diala S3 ZX-I Dried is a high-performance inhibited insulating oil developed for power transformers and high-voltage electrical equipment. With ultra-low sulphur content and a drying process that ensures low moisture content, this product delivers high breakdown voltage and reliable insulation performance even under demanding thermal and environmental conditions.

Performance Features & Benefits:

  • Extended Oil Life: High oxidation stability allows long-term operation with minimal sludge and acid formation.
  • Intrinsic Copper Compatibility: Non-corrosive due to the absence of active sulphur; complies with modern copper corrosion tests.
  • Dry Handling for High Dielectric Strength: Dried and filtered to maintain breakdown voltage >60 kV as delivered, >70 kV after treatment.
  • Low-Temperature Operability: Pour point of –60 °C supports efficient heat transfer in cold environments.

Main Application Areas:

  • Power and distribution transformers
  • Shunt reactors and generator transformers
  • Rectifiers, circuit breakers, and switchgear

Specifications & Approvals:

  • IEC 60296 (Edition 4.0 – 2012-02), Table 2 – Inhibited oils (High Oxidation Stability)
  • DIN 51353, IEC 62535, ASTM D1275B – Not corrosive to copper
  • Free from polychlorinated biphenyls (PCBs)

Environmental & Safety Information:

  • Avoid contact with skin. Use impervious gloves with used oil. Wash skin thoroughly after contact.
  • Prevent discharge into drains, soil, or water. Dispose of used oil at authorized collection points.
  • Safety Data Sheet (SDS) available via inquiry

Technical Specifications:

Property Typical Value Method
Appearance Clear, free from sediment and suspended matter IEC 60296
Density @ 15 °C 881 kg/m³ ISO 3675
Density @ 20 °C 878 kg/m³ ISO 3675
Kinematic Viscosity @ 40 °C 8.0 mm²/s ISO 3104
Kinematic Viscosity @ –30 °C 720 mm²/s ISO 3104
Flash Point (PM) 138 °C ISO 2719
Pour Point –60 °C ISO 3016
Neutralisation Value <0.01 mg KOH/g IEC 62021-1
Corrosive Sulphur (DIN 51353) Not corrosive Complies
Corrosive Sulphur (IEC 62535) Not corrosive Complies
Corrosive Sulphur (ASTM D1275B) Not corrosive Complies
Breakdown Voltage – As Delivered >60 kV IEC 60156
Breakdown Voltage – After Treatment >70 kV IEC 60156
Dielectric Dissipation Factor (DDF) 0.001 IEC 60247
Oxidation Stability (500 hrs) – Total Acidity 0.02 mg KOH/g IEC 61125 C
Oxidation Stability (500 hrs) – Sludge 0.01 % IEC 61125 C
Oxidation Stability (500 hrs) – DDF @ 90 °C 0.005 IEC 61125 C
Inhibitor (DBPC) 0.3 % IEC 60666

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