Fuse switch disconnector, 3-pole switchable, size 1 I=250A, U=690V AC flat connection M10, new design for integrable current transformers with electronic fuse monitoring The 3NJ4 fuse switch disconnectors for low-voltage distribution. The 1- or 3-pole switchable 3NJ4 fuse switch disconnectors can be used in low-voltage distributors, network and transformer stations and cable distribution cabinets. The Siemens 3NJ4 fuse switch disconnectors are characterized above all by: 1. Compliance with the provisions of IEC/EN 60439-1 and IEC/EN 60947-3. 2. Voltage levels up to AC 690 V. 3. Parking position for maintenance work. 4. Vertical and horizontal installation position. 5. Climate resistance. 6. Protection class IP30 with closed handle inserts, IP10 with open handle inserts. www.siemens.de/schaltgeraete. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and socket outlets for safe, efficient electrical infrastructure in buildings and industry.
| Property | Value |
| Double interrupting: | no |
| Max. Rated operating voltage Ue at AC: | 690 V |
| Rated continuous current Iu: | 250 A |
| Rail center distance 40 mm: | no |
| Rail center distance 50 mm: | no |
| Rail center distance 60 mm: | no |
| Number of poles: | 3 |
| Rail center distance 100 mm: | no |
| Rail centre distance 185 mm: | yes |
