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Shell Diala S4 ZX-IG is an electrical insulating oil from Shell which meets the performance of both IEC 60296 higher oxidation stability and low sulfur as well as ASTM D3487 Type II. In addition, it has been designed to meet the gas absorbing challenges presented by specialized equipment such as high voltage instrument transformers and bushings. It offers an extended oil life with the peace of mind of zero sulfur content. Shell Diala S4 ZX-IG is manufactured from zeo sulfur base oils produced using Shell's GTL (gas-to-liquid) technology. These base oils offer a high degree of compositional consistency and have an excellent response to anti-oxidant. The product is free from PCBs, DBDS and passivators, containing only DBPC antioxidatnt, and a low level or aromatic hydrocarbon (for gas absorption behavior). Shell Diala S4 ZX-IG meets both the established and new industry copper corrosion tests.

Unit of Measure

Package Type

 N/A Drum

Viscosity at 40 Degree Celsius (ºC)

N/A 9.4 cSt

Viscosity at 100 Degree Celsius (ºC) Temperature

 N/A 2.7 cSt

Flash Point

 N/A 158 ºC

Pour Point

N/A -42 ºC

Aniline Point

 N/A 114 ºC

Interfacial Tension at 25 Degree Celsius (ºC) Temperature

 N/A 53 dynes/cm

Rotating Pressure Vessel Oxidation Test (RPVOT)

 N/A 650 min

Dielectric Breakdown

 N/A 36 kV

Dielectric Dissipation Factor

 N/A 0.001

Total Acid Number

 N/A 0.02 mg KOH/g

72 Hours Sludge by Mass

 N/A 0.01 %

164 Hours Sludge by Mass

 N/A 0.01 %

Gassing Tendency

 N/A -5

Oxidation Inhibitor Content

 N/A 0.2%

PCB Content

 N/A Not Detectable

Water Content

 N/A 7 mg/kg

Power Factor at 25 Degree Celsius (ºC) Temperature

 N/A 0.001 %

Power Factor at 100 Degree Celsius (ºC) Temperature

 N/A 0.001 %

Applications

 N/A

Power Plants

Transformers

Features and Benefits

 N/A
  • Extended Oil Life: Shell Diala S4 ZX-IG is a fully inhibited gas absorbing oil giving outstanding oxidation performance and an extended oil life. It has the ability to absorb gases such as hydrogen which can develop under partial discharge conditions. This makes Shell Diala S4 ZX-IG the recommended Shell product for special applications with high voltage gradients, such as bushings and instrument transformers requiring gas absorbing properties.
  • Transformer Protection: Shell Diala S4 ZX-IG is manufactured from a zero sulfur* base oil, making it intrinsically non-corrosive towards copper, without the need for passivation or other additives (apart from the DBPC antioxidant, and a low leverl or aromatic hydrocarbon (for gas absorption behaviour)). Shell Diala S4 ZX-IG meets all relevant tests for copper corrosion, namely the established DIN 51353 (Silver Strip Test), ASTM D1275, and also the latest more severe tests: IEC 62535 and ASTM D1275B.
  • System Efficiency: The good low temperature viscometric properties of the oil ensure proper heat transfer inside the transformer, even from very low starting temperatures. Shell Diala S4 ZX-IG is specially dired and handled to achieve a low water content and retain a high breakdown voltage at point of delivery.  This enables it to be used in many applications without further treatment.

*Sulfur content below 1 ppm detection limit of ASTM D5185

Claims (Meets Requirements)

 N/A ANSI/ASTM D3487 Type II IEC 60296 (Edition 4 year 2012); Table 2 Transformer Oil (I) (Inhibited Oil) Section 7.1 ("Higher Oxidation Stability & Low Sulfur Content") IEC 60296 (Edition 5 year 2020); Type A, Fully Inhibited High Grade Oils

Additional Information

 N/A
  • Health & Safety: Shell Diala S4 ZX-IG is unlikely to present any significant health or safety hazard when properly used in the recommended application and good standards or personal hygiene are maintained. Shell Diala S4 ZX-IG is free from polychlorinated biphenyls (PCB). Avoid contact with skin. Use impervious gloves with used oil. After skin contact, wash immediately with soap and water.
  • Storage Precautions: The critical electrical properties of Shell Diala are easily compromised by trace contamination with foreign material. Typically encountered contaminants include moisture, particles, fibers, and surfactants. Therefore it is imperative that electrical insulating oils be kept clean and dry. It is strongly recommended that storage containers be dedicated for electrical service and include air-tight seals. It is further recommended that electrical insulating oils are stored indoors in climated-controlled environments.