LAK 380
APPLICATION
It is suitable for impregnation of transformers, chokes and different types of electric motors.
CHARACTERISTICS
Impregnating enamel 380 is varnish, which provides toughness, imperviousness, insulating properties in different natural conditions. The enamel dries rapidly in thin film to give very effective sealing off of electrical leakage paths together with excellent noise reduction characteristics. The cured product has an excellent resistance to transformer oils, moisture according to BSEN 600464 type 1.1 (IEC 600464) and is suitable for use in class H insulating system.
- On air drying alkyd phenol enamel
- High flash point
- Class H
Tab.1 Processing data
| Viscosity | 20 °C | [s] Ford 4 | 115 - 145 |
| Non-volatile content | [%] | 45 - 50 | |
| Density | [kg/m3] | 0,92 - 0,94 | |
| Flash point (AP) | [°C] | 40 | |
| Shelf-life | max. 20 °C | [month] | 12 |
Tab.2 Processing
| Processing method | cold dipping | warm dipping | VPI |
| Viscosity [s] | 65 - 120 | 65 - 150 | 65 - 150 |
|
Reducer |
T4 | T4 | T4 |
|
Curing [h] |
4 (at 130 °C) | 2 (at 160 °C) |
Tab. 3 Properties after cure
| Bundle test | at 23 °C | [N] 201 |
| at 155 °C | [N] 17.7 | |
| Electric strength | at 23 °C | [kV/mm] 166 |
| after 24 h in water | [kV/mm] 122 | |
|
Thermal endurence according to UL1466 |
[°C] | Twisted pair Helical coil 180 200 |
PACKING
Impregnating enamel is delivered in 25,5 l cans.
