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The Siemens 3LD2064-1GP51 is a 3-pole switch disconnector designed for robust industrial applications. It offers reliable power isolation up to 16 A and 7.5 kW at 400 V, featuring a durable molded-plastic enclosure with IP65 protection and a straightforward rotary actuator. Its primary benefit is providing a safe and efficient means of disconnecting electrical circuits, though it lacks integrated overload protection, requiring external safety devices.
| Series | 3LD |
|---|---|
| Model Part Number | 3LD20641GP51 |
| Brand | Siemens |
Its primary purpose is to provide a safe and reliable means of manually isolating electrical circuits, ensuring that power is completely cut off for maintenance or operational safety.
No, the Siemens 3LD2064-1GP51 does not have integrated overload or short-circuit protection. External protective devices such as fuses or circuit breakers must be installed.
An IP65 rating means the enclosure is protected against dust ingress and against low-pressure jets of water from any direction, making it suitable for many industrial environments.
While durable, this is a manual switch disconnector intended for safety isolation rather than frequent operational switching. For frequent switching, consider motor-driven or automatic circuit breakers.
The switch disconnector is rated for a maximum operating power of 7.5 kW at 400 V AC-23A.
The auxiliary contacts can be wired into control circuits to provide status feedback (e.g., 'switch ON' or 'switch OFF' signals) or to implement interlocking functions with other equipment.
Please refer to the official Siemens warranty documentation or your point of purchase for specific warranty terms and duration.
Ensure the rotary actuator is not obstructed. Check for any debris around the mechanism. Operate the switch fully a few times to clear minor obstructions.
De-energize the circuit completely. Use an appropriate screwdriver to tighten the terminal screws. Do not overtighten, but ensure a secure connection.
Verify the wiring to the auxiliary contacts (1 NO, 1 NC). Ensure the main switch is in the correct position to activate them. Check for continuity issues with the auxiliary contacts themselves.
De-energize the circuit. Check the wire gauge suitability for the current. Ensure terminals are properly tightened. If overheating persists, the load may exceed the switch's rating, or there may be an internal fault.
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