Shell MIDEL 7131

Specifications

Brand

Shell

Category

Transformer & dielectric oils

Manufacturer code

007A3822

Availability

On order

Typical characteristics

Manufacturer's description

Synthetic Ester Electrical Insulating Liquid, Fire Safe and Biodegradable. Shell MIDEL 7131 is a biodegradable, synthetic ester electrical insulating liquid. It is designed to provide an alternative to conventional mineral oil, silicone fluid and dry-type transformers. It offers robust low temperature performance and extended asset life. Shell MIDEL 7131 has a high fire point, significantly increasing the fire safety of your transformers and reducing the need for fire protection equipment. It is also biodegradable, avoiding environmental damage should leakage occur and enabling simplifications in containment measures.

Applications

• Electrical insulating fluid for power and distribution transformers, as an alternative to mineral oil, silicone fluid and dry-type transformers.
• Suitable for indoor, outdoor and underground transformer installations.

Performance & benefits

• SYNTHETIC ESTER ADVANTAGES
• Superior oxygen stability
• Flexible - used in non-free-breathing and breathing systems
• Proven up to 433kV
• EXTENDS TRANSFORMER LIFE Absorbs large amounts of moisture with no reduction of breakdown voltage (up to 600ppm)
• Allows moisture to migrate from cellulose into the fluid, thus, extending cellulose life
• Very high saturation limit (2,700 ppm @ 20 0 C) making precipitation of free water virtually impossible
• INCREASED FIRE SAFETY
• 100% fire safety recordHigh fire point (>300 0
• C) - K class classification
• K3 classification (IEC 61039)
• ENVIRONMENTAL PROTECTION Biodegradable according to OECD 301B: Shell MIDEL 7131 exceeds 60% biodegradation OECD 301B test after 28 days.
• Not detrimental to activated sludge in biological treatment plants.
• ENABLES INNOVATION
• Allows for compact transformer design
• Provides a higher power output, without the need for high temperature insulation
• COLD TEMPERATURE OPERATION Very low pour point: -56 0
• C
• High performance in cold climates EXTENDS TRANSFORMER LIFE
• Absorbs large amounts of moisture with no reduction of breakdown voltage (up to 600ppm)
• High fire point (>300 0 C) - K class classification
• Suitable for indoor, outdoor and underground installations ENVIRONMENTAL PROTECTION
• Biodegradable according to OECD 301B: Shell MIDEL 7131 exceeds 60% biodegradation OECD 301B test after 28 days
• Option to run at a higher temperature, for a standard lifetime temperature insulation COLD TEMPERATURE OPERATION
• Very low pour point: -56 0 C

Standards & approvals

• IEC 61099

  IEC 61099 — synthetic ester insulating liquids

  The IEC specification for unused synthetic organic ester liquids for electrical purposes, such as transformer fluids.

• ASTM D8240

  ASTM D8240 — synthetic ester insulating liquids

  The ASTM specification for unused synthetic ester dielectric fluids for electrical apparatus, the American counterpart of IEC 61099.

• IEC 61039

  IEC 61039 — classification of insulating liquids

  The IEC classification of insulating liquids by fire-safety class (K-class, based on fire point/net calorific value), used to select less-flammable transformer fluids.

• UL Listed

  UL Listed — safety certification

  Underwriters Laboratories’ safety listing/approval mark, cited here for dielectric (transformer) fluids.Source

• OECD 301B

  OECD 301B biodegradability above 60 %

  A test result rather than a norm: OECD 301B measures the carbon dioxide evolved over 28 days. Above 60 % counts as "readily biodegradable", the threshold the environmental labels require.