NH 91/2Z, NH 91 LV/2Z
Application
It is designated for trickling impregnation of mechanically and thermally stressed windings of alternators and electrical rotating machines for domestic appliances and hand tools of thermal class H (180°C).
Trickling impregnating resin NHZ 94 is delivered according to TP VUKI 0212/08.
Characteristics
Two-component trickling impregnating resins NH91../2Z are characterized by short curing time 15 min. by 130-150°C in winding. They are based on solution of modified unsaturated polyester resin in dialyphtalate. Windings impregnated with it have very good bonding strength, resistance to vapour solvents, transformer oils and radioactive radiation. Before processing it must be mixed with a hardener Z 83 in the mass ratio 100:2 or 100:2,5.
Tab.1 Processing data
| NH 91/2Z | NH 91 LV/2Z | ||
| HDensity (DIN 53 217) 20 °C | [kg/m3] | 1130 - 1160 | 1120 - 1140 |
| Flow time DIN Cup 4 25°C ISO Cup 6 25°C |
[s] | 110 - 150 75 - 110 |
50 - 80 35 - 60 |
| Shelf-life up to 25°C | [month] | 6 | 6 |
| Flash point STN EN 22592 | [°C] | >145 | >145 |
| Gel time1) 100°C | [min] | 7 - 12 | 7 - 12 |
| Gel time1) 130°C | [min] | 6 - 11 1,5 - 3 |
6 - 11 1,5 - 3 |
| Reaction time 2) 3) 100°C | [min] | 7 - 11 | 7 - 11 |
| Exothermal temperature 2) 3) 100°C | [°C] | 210 - 240 | 210 - 240 |
| Curing time 4) 130 °C 140 °C |
[min] | 15 - 30 10 - 15 |
15 -30 10 -15 |
| Test of effect of impregnating resin on enameled wires 5) meets (IEC 60317 – 3, -8, -13) |
vyhovuje | vyhovuje | |
Tab.2 Properties after cure
| NH 91/2Z | NH 91 LV/2Z | ||
| Drying to depth 2),6) | I. 1.1.1.10) 0. 1.1.1. |
I. 1.1.1.10) 0. 1.1.1. |
|
| Curing of test specimen 130°C | [h] | 2 | 2 |
| Electric strength 2),7) 23 °C after 24 h in water |
[kV/mm] | 120 - 140 40 - 60 |
120 - 140 40 - 60 |
| Volume resistivity 2) 23 °C 180 °C after 96 h in water |
[Ω.m] | 1014 1010 1013 |
1014 |
| Twisted coil test 8) 23 °C 180 °C |
[N] | 250 - 350 100 - 120 |
300 100 - 120 |
| Thermal endurance 9) | [°C] | 180 | 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 130(140°C) in windings
5). STN 67 3150 čl. 11, met. B after 60 min at 60 °C
6). 1h by 100°C + 2h 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
Impregnating resins complied with tests done in German state laboratory.
Test protocol: PTB Nr. III B/C-706 U
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 25kg, eventually in packages according to agreement between producer and client.
Impregnating resins are stored in tightly closed packages in dry ventilated warehouse by max.+25°C, which complies with STN 65 0201. In terms of traffic regulations are impregnating resin classified as dangerous products class 9, UN: 3082
