| SENTRON, Switch disconnector 3LD, main switch, 4-pole, Iu: 16 A, Operating power / at AC-23 A at 400 V: 7.5 kW, front-mounted, knob-operated mechanism, black, central mounting 22.5 mm of the handle |
| Model |
| Product brand name | SENTRON |
| Product designation | 3LD Switch disconnector |
| Design of the product | Main switch |
| Display version / for switch position indicator manual operation | 1 ON - 0 OFF |
| Design of the operating mechanism | selector switch |
| Design of handle | knob-operated mechanism, black |
| Type of the driving mechanism / motor drive | No |
| General technical data |
| Number of poles | 4 |
| Type of device | fixed mounting |
| Type of switch | front mounted |
| Size of switch disconnector | 1 |
| Operating frequency / maximum | 50 1/h |
| Voltage |
| Insulation voltage / rated value | 690 V |
| Surge voltage resistance / rated value | 6 kV |
| Protection class |
| Protection class IP | IP65 |
| Protection class IP / on the front | IP65 |
| Dissipation |
| Power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 0.5 W |
| Electricity |
| Current / at AC / rated value | 16 A |
| Continuous current / rated value | 16 A |
| Continuous current / of upstream fuse / rated value | 20 A |
| Short-time current resistance (Icw) / at 690 V / limited to 1 s / rated value | 340 A |
| Main circuit |
| Operating frequency | |
| initial value | 50 Hz |
| Full-scale value | 60 Hz |
| Operating power | |
| at AC-23 A / at 400 V / rated value | 7.5 kW |
| at AC-23 A / at 690 V / rated value | 7.5 kW |
| at AC-3 / at 400 V / rated value | 5.5 kW |
| at AC-3 / at 690 V / rated value | 5.5 kW |
| Operating voltage | |
| at AC / at 50/60 Hz / rated value | 690 V |
| 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 |
| Operating voltage / of auxiliary contacts / at AC / maximum | 500 V |
| Continuous current / of the auxiliary contact / rated value | 10 A |
| Insulation voltage / of the auxiliary switch / rated value | 500 V |
| Suitability |
| Suitability for use | |
| Main switch | Yes |
| switch disconnector | Yes |
| EMERGENCY OFF switch | No |
| safety switch | Yes |
| maintenance/repair switch | Yes |
| Product details |
| Product feature / interlock | Yes |
| Number of bracket locks / maximum | 2 |
| Hasp thickness / of bracket locks / minimum | 4 mm |
| Hasp thickness / of bracket locks / maximum | 6 mm |
| Product extension / optional | |
| motor drive | No |
| Voltage trigger | No |
| Short circuit |
| Conditional short-circuit current / with line-side fuse protection | |
| at 690 V / by gG fuse / rated value | 50 kA |
| Connections |
| Type of connectable conductor cross-sections | |
| for copper conductor / solid | 1x (1
6mm²) |
| for copper conductor / finely stranded / with core end processing | 1x (1
4mm²) |
| for copper conductor / stranded | 1x (1
6mm²) |
| for auxiliary contacts / solid | 2x (0.75 ... 2.5 mm²), 1x 4 mm² |
| for auxiliary contacts / finely stranded / with core end processing | 2x (0.75 ... 1.5 mm²), 1x 2.5 mm² |
| for auxiliary contacts / stranded | 2x (0.75 ... 2.5 mm2), 1x 4 mm2 |
| Type of electrical connection | |
| for main current circuit | box terminal |
| for auxiliary contacts | connection terminals |
| Requirements |
| Design of the fuse link | |
| for short-circuit protection of the main circuit / required | fuse gL/gG: 20 A |
| for short-circuit protection of the auxiliary switch / required | fuse gL/gG: 10 A |
| Mechanical Design |
| Height | 66 mm |
| Width | 49 mm |
| Depth | 113.5 mm |
| Mounting type | Built-in unit fixed-mounted version |
| Mounting type | |
| front mounting with 4-hole attachment | No |
| front mounting with central attachment | Yes |
| rail mounting | No |
| Net weight | 218 g |
| Environmental conditions |
| Ambient temperature | |
| during operation / minimum | -25 °C |
| during operation / maximum | 55 °C |
