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1K-NAH 99, 1K-NAH 99UV

Application

Impregnating resins are suitable for insulation systems of thermal class H. They are designated for impregnation of windings of electrical rotating machines and transformers from big diameter enameled wires and from big diameter rectangular wires.

Characteristics

Impregnating resins are one-component based on solution of unsaturated polyesterimid resins in diacrylate. Only a small amount of volatile substances avoid during curing. They do not pollute working environment and do not cause fire danger. It is not necessary to clean exhaust air. Impregnating resins are resistant to transformer oils and refrigerator liquids.

Processing

Impregnating resin 1K-NAH 99 can be processed at conventional impregnating appliances under atmospheric pressure and vacuum by dipping, flooding or sloshed during rotation. Impregnating resin 1K-NAH 99 can be processed at impregnating appliance with combined curing by electrical current and UV radiation.

Tab.1 Processing data

Density (DIN 53 217) 20°C [kg/m3] 1050 - 1150
Viscosity 25°C [mPa.s] 2000 - 2500
Shelf-life +5°C to 25°C [month] min. 6
Flash point STN EN 22592 [°C] >112
Gel time1) 130°C [min] 3 - 4
Gel time2) 3) 100°C [min] 9 - 16
Reaction time2) 3) 100°C [min] 10 - 17
Exothermal temperature2) 3) 100°C [°C] 200 - 220
Curing time4) 130°C [h] 2 - 3
Test of effect of impregnating resin on enameled wires5 meets
(IEC 60317 -3, -8, -13)		 vyhovuje

Tab.2 Properties after cure

Drying to depth2),6) I. 1.1.1.10)
0. 1.1.1.
Curing of test specimen 150°C [h] 1

Electric strength 2), 7)

23 °C
155 °C
after 96h v 92% water 23 °C

 [kV/mm]

80 - 100
60 - 80
40 - 60

Volume resistivity 2)

23 °C
155 °C
after 96 h water 23 °C

[Ω.m]

1014
109
1013

Twisted coil test 8)

23 °C
155 °C
180 °C

 [N]

230 - 260
55 - 65
50 - 60
Thermal endurance 9) [°C] 160 - 180
Thermal endurance11)
Test criterion: Breakdown voltage 1500 V (Twisted pairs)		 [°C] 180

1). DIN 16 945  Method A                                   
2). DIN 46 448 Blatt 1
3). Fe-Ko thermocouple according to ASTMD 2471-71
4). Since reaching of temperature 130°C in winding
5). STN 67 3150 čl. 11, met. B after 60 min at 60°C
6). 1h by 100°C + 1h by 130°C
7). Test specimens A2, cylindrical electrode diameter 6 mm
8). STN IEC 61033
9). STN IEC 60216-1, -2
10). Specimen appearance: hard, free of leaks and bubbles, surface smooth, non tacky
11). UL test 1446 File E 233982

 

Impregnating resins complied with tests done in American laboratory Underwriters Laboratories Inc.
Test protocol: UL E233982

Packing and storage

Impregnating resin is delivered in non-returnable, clean, for other products not used packages in 200kg and 50kg, eventually in packages according to agreement between producer and client.
 
Impregnating resins are stored in tightly closed packages in dry ventilated warehouse by +5°C to +25°C, which complies with STN 65 0201. In terms of traffic regulations are impregnating resins not classified as dangerous products.