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شرکت نفت شل، (به انگلیسی: Shell Oil Company) شرکت نفت و گاز آمریکایی و شعبه کمپانی رویال داچ شل در ایالات متحده آمریکا می‌باشد.این شرکت در زمینه استخراج نفت و گاز طبیعی، بازاریابی فرآورده‌های نفتی، همچنین تولید محصولات پتروشیمی فعالیت می‌کند.شرکت نفت شل، با در اختیار داشتن بیش از ۲۵٫۰۰۰ جایگاه پمپ بنزین در ایالات متحده، مالک بزرگترین شبکه عرضه سوخت در این کشور می‌باشد. شمار کارکنان این شرکت حدود ۲۲٬۰۰۰ نفر است و دفتر مرکزی آن در هیوستون، تگزاس قرار دارد.

 

Shell Diala Oil D

Very high performance electrical oil

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

Shell Diala D meets both the established and new copper corrosion tests.

Applications

Transformers
Electrical insulating oil for transformers, 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.

Perormance 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
Meets the requirements of all major specifications.

Anti corrosion properties
Shell Diala D is non-corrosive towards copper, with no need for passivation. Diala D meets all relevant tests on copper corrosion, namely the established

DIN 51353 (Silver Strip Test) and ASTM D1275, and also the newer tests: IEC 62535 and

ASTM D1275B.

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.
Low water content of delivered oil
Diala D is available in drums and pails (and in

restricted regions in bulk) as “Shell Diala D dried”, specially handled to retain a high breakdown voltage as delivered. This enables the product to be used in many applications without further treatment.

Specification and Approvals

Shell Diala D meets the following specifications:

IEC 60296 (2003)

Table 2 Transformer Oil (U), uninhibited

Baader oxidation test of (obsolete) DIN 57370-1 (1978)

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, fibres 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.

Typical Characteristics

Property Units Method IEC 60296 Requirements Diala D

Appearance

IEC 60296

Clear, free from sediment and suspended matters

Complies

Density at 15 ºC kg/m3 ISO 3675 – ۸۸۴
Density at 20 ºC kg/m3 ISO 3675 Max. 895 ۸۸۱
Kinematic viscosity at 40 ºC mm2/s ISO 3104 Max. 12 ۸,۱
Kinematic viscosity at 20 ºC mm2/s ISO 3104 – ۱۷,۳
Kinematic viscosity at –۳۰ ºC mm2/s ISO 3104 Max. 1.800 ۷۳۰
Flashpoint P.M. ºC ISO 2719 Min. 135 ۱۳۸
Pourpoint ºC ISO 3016 Max. -40 -۶۰
Neutralisation value mg KOH/g IEC 62021-1 Max. 0,01 < 0,01 Corrosive Sulphur   DIN 51353 Not corrosive Not corrosive Corrosive Sulphur   IEC 62535 – Not corrosive Corrosive Sulphur   ASTM D 1275 B – Not corrosive Breakdown voltage Untreated After treatment kV IEC 60156 Min. 30 Min. 70 >30

>70

Dielectric dissipation factor

(DDF) at 90 ºC

IEC 60247

Max. 0,005

۰,۰۰۱

Oxidation Stability

(۱۶۴ h /120 ºC) Total acidity Sludge

DDF at 90 ºC

mg KOH/g

%m

IEC 61125 C

Max. 1,2

Max. 0,8

Max. 0,5

۰,۲۳

۰,۱

۰,۱۵

Oxidation Stability

Baader (140h /110 ºC) Neutralisation value Sludge content

Dielectric dissipation factor

(DDF) at 90 ºC

mg KOH/g

% m

DIN 51554

۰,۰۹

۰,۰۲

۰,۱

These characteristics are typical of current production.

Whilst future production will conform to Shell’s specification, variations in these characteristics may occur.

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