 |
| item | Unit | Insulating paper : constructed with aramid paper | ||||
| NPN-222(SA) | NPN-252(SA) | NPN-272(SA) | NPN-333(LA) | |||
| Construction | Aramid-1 | - | 2 mils | 2 mils | 2 mils | 3 mils |
| Film-2 | - | PEN #50 | PEN #125 | PEN #188 | PEN #75 | |
| Aramid-3 | - | 2 mils | 2 mils | 2 mils | 3 mils | |
| Adhesive | - | Acrylic | Acrylic | Acrylic | Acrylic | |
| Nominal thickness | μm | 210 | 290 | 350 | 260 | |
| Tensile strength | MD | MPa | 90 | 105 | 110 | 110 |
| TD | 65 | 100 | 105 | 85 | ||
| Edge burst strength resistance | MD | N/20mm | 560 | 1150 | 1320 | 840 |
| TD | 530 | 960 | 1320 | 830 | ||
| Dielectric break down voltage | A | kV | 14 | 20 | 22 | 17 |
| D-24/23 | 14 | 20 | 22 | 17 | ||
| Comparative tracking index | V | 575(PLC rank1) | 375(PLC rank2) | |||
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上述括号内为营业时间（北京时间）周六、周日和节假日除外
