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Shell MIDEL 7131
Synthetic ester electrical insulating liquid, fire-safe and biodegradable
IEC 61099
Specifications
- Brand
- Shell
- Category
- Transformer & dielectric oils
- Manufacturer code
- 007A3823
- Availability
- On order
Typical characteristics
| Property | Typical value | Limit | Method |
|---|---|---|---|
| Colour | 0.5 | ≤1 | ASTM D1500 |
| Flash point°C | ≥ 315 | ≥275 | ASTM D92 |
| Fire point (COC)°C | ≥ 350 | ≥300 | ASTM D92 |
| Pour point°C | -31 | ≤-10 | ASTM D97 |
| Density @20°Ckg/m3 | 920 | ≤1 000 | ISO 3675 |
| Relative density @15°C | 0.92 | ≤0.96 | ASTM D1298 |
| Kinematic viscosity @100°Cmm2/s | 8.3 | ≤15 | ASTM D445 |
| Kinematic viscosity @40°Cmm2/s | 37 | ≤50 | ISO 3104 |
| Kinematic viscosity @0°Cmm2/s | 230 | ISO 3104 | |
| Appearance | Bright and Clear | Bright and Clear | ASTM D1524 |
| Biodegradability% | Readily Biodegradable | Readily Biodegradable | OECD 301 |
| Dielectric Breakdown voltagekV | ≥ 30 | ≥30 | ASTM D877 |
| Dielectric Breakdown voltage as received @60 Hz, VDE, 1 mm gapkV | 32 | ≥20 | ASTM D1816 |
| Dielectric Breakdown voltage @60 Hz, VDE, 2 mm gapkV | 58 | ≥35 | ASTM D1816 |
| Breakdown voltagekV | ≥ 75 | ≥35 | IEC 60156 |
| Gassing tendencymm3/min | -93.6 | ≤0 | ASTM D2300 |
| Dielectric dissipation Factor (power Factor) @25°C% | ≤ 0.2 | ≤0.2 | ASTM D924 |
| Dielectric dissipation Factor (power Factor) @100°C% | ≤ 4.0 | 4 | ASTM D924 |
| Dielectric dissipation Factor | ≤ 0.03 | 0.05 | IEC 60247 |
| Corrosive sulphur | Non-corrosive | Non-corrosive | ASTM D1275 |
| Water contentmg/kg | 50 | ≤200 | ASTM D1533 |
| Acid numbermg KOH/g | ≤ 0.04 | ≤0.06 | ASTM D974 |
| PCB contentmg/kg | Not detectable | Not detectable | ASTM D4059 |
| Oxidation stability - Total aciditymg KOH/g | ≤ 0.1 | ≤0.6 | IEC 61125 C |
| Oxidation stability - Kinematic viscosity @40°Cmm2/s | 8% | ≤ 30% over initial | ISO 3104 |
| Oxidation stability - Dielectric dissipation Factor @90°C | ≤ 0.1 | ≤0.5 | IEC 60247 |
Complete documentation
We email you this product's sheets in a single archive.
Manufacturer's description
Natural Ester (Rapeseed) Electrical Insulating Liquid, Fire Safe and. Biodegradable Shell MIDEL eN 1204 is a readily biodegradable, natural 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 eN 1204 has a high fire point, significantly increasing the fire safety of your transformers and reducing the need for fire protection equipment. It is also readily biodegradable, avoiding environmental damage should leakage occur and enabling simplifications in containment measures.
Applications
- Natural ester (rapeseed) 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
- INCREASED FIRE SAFETY
- 100% fire safety recordHigh fire point (>300 0
- C) – K3 class classification
- Suitable for indoor, outdoor and underground installationsENVIRONMENTAL PROTECTION
- Renewable vegetable oil
- Lower carbon footprint than conventional mineral oil
- Readily biodegradable
- Non-toxic
- SUPERIOR MOISTURE TOLERANCE Absorbs large amounts of moisture with no reduction of breakdown voltage (up to 300ppm)
- High saturation limit (1100ppm @20 0 C) making precipitation of free water virtually impossible
- COLD CLIMATE OPERATION -31 0 C pour point, performs better than soya ester ASSET LIFE EXTENSION Slower rate of cellulose ageing than conventional mineral oil
- Option to run at a higher temperature, for a standard lifetime
- Provides a higher power output, without the need for high temperature insulation
- ENABLES INNOVATION
- Allows for compact transformer design
- Permits greater flexibility and temporary overload resilience
- High fire point (>300 C) – K3 class classification
- No corrosive sulphur SUPERIOR MOISTURE TOLERANCE
- Absorbs large amounts of moisture with no reduction of breakdown voltage (up to 300ppm) 0
- Slower rate of cellulose ageing than conventional mineral oil
- Longer cellulose lifetime at standard temperatures
- Proven up to 420kV Shell MIDEL eN 1204
Standards & approvals
IEC 62770
IEC 62770 — natural ester insulating liquids
The IEC specification for unused natural ester liquids (vegetable-oil-based) for electrical transformers.
ASTM D6871
ASTM D6871 — natural ester insulating liquids
The ASTM specification for natural (vegetable-oil-based) ester dielectric fluids used in transformers, the American counterpart of IEC 62770.
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