| In-line fuse switch disconnector 3-pole selectable, Sz. 1 I=250 A, U=690 V AC Flat terminal M10, new design for current transformers that can be integrated with electronic fuse monitoring |
| Model |
| Product brand name | SENTRON |
| Product designation | Fuse switch disconnectors |
| Design of the product | in in-line design |
| Design type | Fixed-mounted |
| Type of switching contact / double breaking switching contact | No |
| Design of the auxiliary release | No |
| Design of the auxiliary switch | No |
| Version of fuse monitoring | Electronic |
| Design of the load switch / Strip form | Yes |
| General technical data |
| Number of poles | 3 |
| Number of poles / Note | 3-pole switchable |
| Type of device | For busbar system 185 mm |
| Size of fuse link | NH1 |
| Continuous current / at 35 °C / rated value | 250 A |
| cut-off value I**2t,max. / 500 V | 780 000 A²·s |
| circuit-breaker / Design | 3NJ4 |
| Fuse system | LV HRC fuse |
| Voltage |
| Insulation voltage / rated value | 1 000 V |
| Protection class |
| Protection class IP / on the front | IP30 |
| Dissipation |
| Power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 7.66 W |
| Electricity |
| Number of transformers | 0 |
| Continuous current | |
| rated value | 250 A |
| at 40 °C / rated value | 237.5 A |
| at 45 °C / rated value | 225 A |
| at 50 °C / rated value | 212.5 A |
| at 55 °C / rated value | 200 A |
| at 60 °C / rated value | 187.5 A |
| at 65 °C / rated value | 175 A |
| at 70 °C / rated value | 162.5 A |
| Let-through current / Ic / maximum permissible | |
| 400 V | 28 kA |
| 500V | 28 kA |
| cut-off value I**2t,max. / 400 V | 780 000 A²·s |
| Main circuit |
| Operating voltage | |
| at AC / at 50/60 Hz / rated value | 690 V |
| at DC / rated value | 440 V |
| Operating current / with capacitive load | |
| at 400 V / maximum | 144 A |
| at 500 V / maximum | 110 A |
| Suitability |
| Suitability for operation | System protection |
| Suitability for use | |
| Main switch | No |
| switch disconnector | Yes |
| EMERGENCY OFF switch | No |
| safety switch | No |
| maintenance/repair switch | No |
| Product details |
| Product component | |
| Voltage trigger | No |
| undervoltage release | No |
| undervoltage release with leading contact | No |
| Short circuit |
| Conditional rated short-circuit current / in utilization category | |
| AC-21 B / at 400 V | 110 kA |
| AC-21 B / at 500 V | 110 kA |
| AC-22 B / at 400 V | 110 kA |
| AC-22 B / at 500 V | 110 kA |
| Connections |
| Arrangement of electrical connectors / for main current circuit | Flat terminal |
| Type of electrical connection / for main current circuit | busbar connection |
| Mechanical Design |
| Height | 662 mm |
| Width | 99.5 mm |
| Depth | 195 mm |
| Mounting position | vertical |
| Mounting type | Flachanschluss, M 10 |
| Busbar center-to-center spacing | 185 mm |
| Busbar center-to-center spacing | |
| 40 mm | No |
| 50 mm | No |
| 60 mm | No |
| 100 mm | No |
| 185 mm | Yes |
| Net weight | 6.32 kg |
| Environmental conditions |
| Ambient temperature | |
| during operation / minimum | -25 °C |
| during operation / maximum | 55 °C |
