Shell Diala S3 ZX-I is a premium inhibited electrical insulating oil formulated with ultra-low sulphur content, offering exceptional oxidation stability, excellent dielectric strength, and superior low-temperature performance for modern transformers and electrical equipment.
  1. Home
  2. JosS Product Catalogue
  3. SHELL LUBRICANTS
  4. Industrial
  5. Electrical Oils
  6. Shell Diala S3 ZX-I

Shell Diala S3 ZX-I

Old product name: Shell Diala DX

Shell Diala S3 ZX-I is a premium inhibited electrical insulating oil formulated with ultra-low sulphur content, offering exceptional oxidation stability, excellent dielectric strength, and superior low-temperature performance for modern transformers and electrical equipment.

Category:

Shell Diala S3 ZX-I

( Previously named: Shell Diala DX )

Premium inhibited electrical insulating oil for transformers and electrical systems

  • Formulated with ultra-low sulphur mineral oils for non-corrosive copper performance

  • High oxidation stability enables extended oil life under severe operating conditions

  • Excellent dielectric properties and insulation performance even at very low temperatures

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

  • Meets DIN 51353, ASTM D1275, IEC 62535, and ASTM D1275B copper corrosion standards

  • Pour point as low as –60 °C ensures reliable fluidity in cold climates

  • Formerly known as: Shell Diala DX

Global Product Code: 001D8375



Application:

Shell Diala S3 ZX-I is a premium inhibited transformer oil developed to provide long-lasting insulation and heat transfer capabilities in high-voltage equipment. It is designed for critical transformer applications, offering excellent oxidation resistance, dielectric strength, and compatibility with modern copper components without requiring passivators.

Performance Features & Benefits:

  • Extended Oil Life: Fully inhibited formulation ensures outstanding oxidation stability under thermal stress.
  • Non-Corrosive Copper Compatibility: Ultra-low sulphur base oil prevents copper corrosion without the need for passivation.
  • Superior Low-Temperature Properties: Pour point of –60 °C allows effective flow and heat transfer in cold environments.
  • Excellent Dielectric Strength: High breakdown voltage values exceed 70 kV after treatment.

Main Application Areas:

  • Power transformers and distribution transformers
  • Generator transformers and shunt reactors
  • Rectifiers, switchgear, and circuit breakers

Specifications & Approvals:

  • IEC 60296 (Edition 4.0 – 2012-02), Table 2 – Inhibited oils, “High Oxidation Stability” section 7.1
  • Meets copper corrosion standards: DIN 51353, ASTM D1275, IEC 62535, ASTM D1275B
  • Free from polychlorinated biphenyls (PCB)

Environmental & Safety Information:

  • Avoid skin contact. Use gloves with used oil and wash with soap and water after contact.
  • Prevent contamination of soil, drains, and waterways. 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) 140 °C ISO 2719
Pour Point –60 °C ISO 3016
Neutralisation Value <0.01 mg KOH/g IEC 62021-1
Corrosive Sulphur (DIN 51353 / IEC 62535 / ASTM D1275B) Not corrosive Complies
Breakdown Voltage (Untreated) >30 kV IEC 60156
Breakdown Voltage (After Treatment) >70 kV IEC 60156
Dielectric Dissipation Factor (DDF) 0.001 IEC 60247
Oxidation Stability – Total Acidity (500 hrs @ 120 °C) 0.02 mg KOH/g IEC 61125 C
Oxidation Stability – Sludge (500 hrs) 0.01 % IEC 61125 C
Oxidation Stability – DDF @ 90 °C (500 hrs) 0.005 IEC 61125 C
Inhibitor (DBPC) 0.3 % IEC 60666

    You are inquiring about: