Load-break switch 3LD3, Iu 63 A Main switch 3-pole Rated operating power at AC-23 A at 400V 22.0 kW Distribution board installation Basic switch with toggle drive red/yellow with auxiliary switch 1OE+1S The main and emergency stop switch 3LD for safe shutdown of loads in a wide variety of environments. The possible uses of the 3LD3 mains disconnection devices are diverse. After mains disconnection, they ensure the safe disconnection of all electrical equipment, for example switching three-phase motors, but also air conditioning and ventilation systems. 3LD3 are also predestined for use in control or switch cabinets, particularly for applications in small machines (e.g. saws, compressors, pumps, concrete mixers, drilling machines, milling machines and woodworking machines). The Siemens 3LD main and emergency stop switches are characterized by: 1. Modular design, quick and easy installation of auxiliary switches, N-PE terminal or 4th pole. 2. Versatile thanks to local approvals. 3. One mechanical size for five electrical sizes. 4. Can be used for direct current applications. 5. Mounting types: front mounting, mounting plate, top hat rail. 6. Optimum mains isolation from 16 A to 63 A thanks to the ability to lock the rotary drive. www.siemens.de/schaltgeraete. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe, efficient electrical infrastructure in buildings and industry.
| Property | Value |
| Number of poles: | 3 |
| Rated operating power at AC-23, 400 V: | 22 kW |
| Number of auxiliary contacts as normally closed contacts: | 1 |
| Number of auxiliary contacts as normally open contacts: | 1 |
| Rated continuous current Iu: | 63 A |
| Max. Rated operating voltage Ue at AC: | 690 V |
| Emergency stop device design: | yes |
| Suitable for floor mounting: | yes |
| Integrated motor drive: | no |
| Suitable for 4-hole front mounting: | no |
| Design as maintenance/repair switch: | yes |
| Voltage release optional: | no |
| Suitable for Front fastening central: | no |
| Version as main switch: | yes |
| Version as safety switch: | yes |
| Motor drive optional: | no |
| Lockable: | yes |
| Version as reversing switch: | no |
| Rated short-time withstand current Icw: | 1 kA |
| Rated operating power at AC-3, 400 V: | 19 kW |
| Rated continuous current at AC-21, 400 V: | 63 A |
| Number of switches: | 1 |
| Rated continuous current at AC-23, 400 V: | 43 A |
| Protection class (NEMA): | other |
