Shell Diala Oil D

Shell Diala Oil D
High performance insulating oil
Shell Diala D is a non-inhibited insulating oil manufactured from specially refined high naphthenic feedstock. It offers very high oxidation stability, very good dielectric properties and excellent low temperature properties without the use of pour point depressants. 

Applications
• Industrial transformers
Electrical insulating oil for transformers and switch-gears.
Grid and Industrial transformers up to maximum load.
• Electrical equipment
Components like rectifiers, circuit breakers, switch-gears.
Advice on applications not covered in this leaflet may be obtained from your Shell Representative.
Performance Features and Advantages
• Excellent oxidation stability
Diala D offers inherent natural resistance to oil degradation and is suitable for long life applications.
• Very good dielectric properties
It clearly exceeds the requirements from all major specifications.
• Very good low temperature properties
The naphthenic nature of the feedstock of Diala D provides a superior low temperature performance without the use of additives.
• Very good heat transfer characteristics
The very good fluidity of the oil ensures proper heat transfer inside the transformer, even from lowest starting temperatures.

Specification and Approvals
Shell Diala D meets the following specifications:
DIN 57370-1 (1978)
VDE 0370 Part 1 (1978) Class A
 IEC 296 (1982 Class II
 IEC 60296 (2003)
Table 2 Transformer Oil (U), uninhibited

Note: If compliance with the newly emerging industry standards for copper corrosion is required, this product will require addition of a copper passivator such as
Diala Concentrate P.

Storage precautions
The critical electrical properties of Shell Diala D 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 be stored indoors in climate-controlled environments.

Health and Safety
Guidance on Health and Safety are available on the appropriate Material Safety Data Sheet which can be obtained from your Shell representative.
Shell Diala D is free of polychlorinated biphenyls
(PCB).

Protect the environment
Take used oil to an authorized collection point. Do not discharge into drains, soil or water.