| SENTRON, Fuse switch disconnector 3NP1, 3-pole, NH1, 250 A, for assembly and installation on mounting plate, flat terminal, Fuse monitoring: electronic EFM10, Cover level 70 mm |
| Model |
| Product brand name | SENTRON |
| Product designation | 3NP1 fuse switch disconnector |
| Design of the product | cover level 70 mm |
| Version of fuse monitoring | electronic EFM 10 |
| Design of the operating mechanism | Cover handle |
| Design of the load switch / Strip form | No |
| Type of the driving mechanism / motor drive | No |
| General technical data |
| Number of poles | 3 |
| Type of device | For assembly and installation on mounting plate |
| Size of disconnecting link | 1 and 0 |
| Size of fuse link | NH0, NH1 |
| Continuous current / at 35 °C / rated value | 250 A |
| Let-through current / with closed switch / maximum permissible | 32 kA |
| cut-off value I**2t,max. / 500 V | 780 000 A²·s |
| Power factor | |
| at AC-22 B | 0.65 |
| at AC-23 B | 0.45 |
| with capacitive load | -0.25 |
| circuit-breaker / Design | 3NP11 |
| Mechanical service life (switching cycles) / typical | 1 600 |
| Fuse system | LV HRC fuse |
| Voltage |
| Insulation voltage / rated value | 690 V |
| Power factor / at AC-21 B | 0.95 |
| Surge voltage resistance / rated value | 8 kV |
| Protection class |
| Protection class IP | |
| with closed switch / with cover or cable lug cover | IP40 |
| with closed switch / without cover or cable lug cover | IP30 |
| on the front | IP40 |
| open | IP20 |
| Dissipation |
| Power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 31 W |
| Electricity |
| Continuous current | |
| rated value | 250 A |
| at 40 °C / rated value | 245 A |
| at 45 °C / rated value | 240 A |
| at 50 °C / rated value | 233 A |
| at 55 °C / rated value | 233 A |
| Let-through current / with high-speed activation / maximum permissible | 25 kA |
| Let-through current / Ic / maximum permissible | |
| 400 V | 32 000 A |
| 500V | 32 000 A |
| cut-off value I**2t,max. / 400 V | 551 000 A²·s |
| Main circuit |
| Operating voltage | |
| at AC / rated value / minimum | 230 V |
| at AC / rated value / maximum | 690 V |
| Operating current / with capacitive load | |
| at 400 V / maximum | 72 A |
| at 500 V / maximum | 55 A |
| Auxiliary circuit |
| Number of CO contacts / for auxiliary contacts | 0 |
| Number of NC contacts / for auxiliary contacts | 0 |
| Number of NO contacts / for auxiliary contacts | 0 |
| Suitability |
| Suitability for use | |
| Main switch | No |
| switch disconnector | Yes |
| EMERGENCY OFF switch | No |
| safety switch | Yes |
| maintenance/repair switch | Yes |
| Product details |
| Product feature / interlock | Yes |
| Product component | |
| Trip indicator | Yes |
| Phase failure monitoring | No |
| undervoltage release | No |
| undervoltage release with leading contact | No |
| Product feature / sealable | Yes |
| Product extension | |
| Auxiliary switch | Yes |
| optional | |
| — locking capability | Yes |
| — motor drive | No |
| — Phase failure monitoring | Yes |
| — Voltage trigger | No |
| — Overvoltage protection monitoring | Yes |
| Product function |
| Product function | |
| fuse monitoring | Yes |
| Overvoltage protection monitoring | No |
| Short circuit |
| Conditional short-circuit current (Iq) | |
| rated value | 80 kA |
| at AC / at 500 V / with high-speed activation / rated value | 80 kA |
| at AC / at 690 V / with high-speed activation / rated value | 50 kA |
| with closed switch / at AC / at 500 V / rated value | 120 kA |
| with closed switch / at AC / at 690 V / rated value | 100 kA |
| Connections |
| Arrangement of electrical connectors / for main current circuit | other |
| Connectable conductor cross-section / for main contacts | |
| single or multi-stranded / minimum | 16 mm² |
| single or multi-stranded / maximum | 150 mm² |
| stranded / minimum | 16 mm² |
| stranded / maximum | 150 mm² |
| Tightening torque / with screw-type terminals | |
| minimum | 10 N·m |
| maximum | 12 N·m |
| Type of electrical connection / for main current circuit | busbar connection |
| Mechanical Design |
| Height | 306 mm |
| Width | 183.7 mm |
| Depth | 146.5 mm |
| Mounting position | horizontal/vertical |
| Mounting type | mounting plate |
| Mounting type | |
| floor mounting | Yes |
| front mounting | No |
| front mounting with 4-hole attachment | No |
| front mounting with central attachment | No |
| rail mounting | No |
| Net weight | 2.33 kg |
| Environmental conditions |
| Degree of pollution | 2 |
| Ambient temperature | |
| during operation / minimum | -25 °C |
| during operation / maximum | 55 °C |
| during storage / minimum | -50 °C |
| during storage / maximum | 80 °C |
