| SENTRON, Fuse switch disconnector 3NP4, 3-pole, NH3, 630 A, for Busbar system 8US 60 mm, screw terminal |
| Model |
| Product brand name | SENTRON |
| Product designation | 3NP4 fuse switch disconnector |
| Design type | For snapping on 60 mm busbar systems, without high-speed closing |
| Design of the operating mechanism | Cover handle |
| Design of the load switch / Strip form | No |
| General technical data |
| Number of poles | 3 |
| Size of disconnecting link | NH2, NH3 |
| Size of fuse link | NH2, NH3 |
| Continuous current / at 35 °C / rated value | 630 A |
| power factor cos phi / in utilization category | |
| AC-21 B / at 400 V | 0.95 |
| AC-21 B / at 500 V | 0.95 |
| AC-22 B / at 400 V | 0.65 |
| AC-22 B / at 500 V | 0.65 |
| circuit-breaker / Design | 3NP447 |
| Mounting type | Plug-in |
| Fuse system | LV HRC fuse |
| Voltage |
| Type of voltage | AC/DC |
| Insulation voltage / rated value | 800 V |
| Surge voltage resistance / rated value | 6 kV |
| Protection class |
| Protection class IP / on the front | IP00 |
| Dissipation |
| Power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 15.6 W |
| Electricity |
| Current / rated value | 630 A |
| Continuous current | |
| rated value | 630 A |
| at 40 °C / rated value | 617 A |
| at 45 °C / rated value | 611 A |
| at 50 °C / rated value | 592 A |
| at 55 °C / rated value | 567 A |
| at 60 °C / rated value | 536 A |
| at 65 °C / rated value | 504 A |
| at 70 °C / rated value | 473 A |
| Let-through current / I2 t / maximum permissible / in utilization category | |
| AC-21 B / at 400 V | 5 500 000 A²·s |
| AC-21 B / at 500 V | 5 500 000 A²·s |
| AC-22 B / at 400 V | 5 500 000 A²·s |
| AC-22 B / at 500 V | 5 500 000 A²·s |
| Let-through current / Ic / maximum permissible / in utilization category | |
| AC-21 B / at 400 V | 55 kA |
| AC-21 B / at 500 V | 50 kA |
| AC-22 B / at 400 V | 55 kA |
| AC-22 B / at 500 V | 50 kA |
| Main circuit |
| Operating voltage | |
| at AC / at 50/60 Hz / rated value | 690 V |
| at AC / rated value / maximum | 690 V |
| at DC / rated value | 440 V |
| Rated current Ie / maximum / in utilization category | |
| AC-21 B / at 400 V | 630 A |
| AC-21 B / at 500 V | 630 A |
| AC-22 B / at 400 V | 630 A |
| AC-22 B / at 500 V | 630 A |
| Suitability |
| Suitability for use | system protection |
| Main switch | No |
| switch disconnector | Yes |
| EMERGENCY OFF switch | No |
| safety switch | Yes |
| Product function |
| Product function / fuse monitoring | No |
| Short circuit |
| Maximum short-circuit current breaking capacity (Icu) / at 400 V / rated value | 5.04 kA |
| Conditional rated short-circuit current / in utilization category | |
| AC-21 B / at 400 V | 50 kA |
| AC-21 B / at 500 V | 50 kA |
| AC-22 B / at 400 V | 50 kA |
| AC-22 B / at 500 V | 50 kA |
| Connections |
| Type of electrical connection | 2 - 240 mm² |
| for main current circuit | screw-type terminals |
| Mechanical Design |
| Height | 300 mm |
| Width | 256 mm |
| Depth | 187 mm |
| Number of width units | 1 |
| Mounting type | Busbar |
| Mounting type | |
| floor mounting | No |
| front mounting | No |
| rail mounting | Yes |
| Busbar center-to-center spacing | 60 mm |
| Net weight | 7 578 g |
| Environmental conditions |
| Degree of pollution | 3 |
| Installation altitude / at height above sea level / maximum | 2 000 m |
| Ambient temperature | |
| during operation / minimum | -25 °C |
| during operation / maximum | 55 °C |
| during storage / minimum | -50 °C |
| during storage / maximum | 80 °C |
