Description
Siemens 3LD2704-0TK51 main switch — description and applications
The Siemens 3LD2704-0TK51 main switch is a three-pole load-break switch (Hauptschalter) from the SENTRON 3LD2 series, designed for front mounting on the door or mounting plate of a control cabinet. The device is used for manually switching on and off circuits supplying machines and industrial installations, including motor circuits. It joins the RECOSTOCK range as a brand new (factory new) unit from surplus stock and is aimed at maintenance departments, system integrators, and machine builders who need a proven Siemens component without waiting for the manufacturer's standard lead time.
The housing bears the Siemens logo and the switch-disconnector symbol, while the nameplate on the terminal side carries the full technical data, including the catalogue number 3LD2704-0TK51 and the electrical ratings. Three main current paths with screw terminals confirm the device's three-pole design.
Key features
- Three-pole design — three visible main current paths with screw terminals.
- Rated current AC-21A: 100 A, insulation voltage Ui: 690 V.
- Rated current AC-3: 23 A, motor power 37 kW at 400 V (additional values of 30 kW and 22 kW — the corresponding voltages need to be verified).
- Compliance with the IEC/EN 60947-3 standard.
- Black control knob with clearly legible O/OFF position marking, front-panel mounting.
- The set includes three transparent turquoise terminal covers — their exact function and whether they are part of the standard scope of delivery remain to be confirmed (pending verification).
- Origin: Made in Germany, manufactured by Siemens AG
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