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The Siemens 3LD2504-0TK51 is a 3-pole, 63A circuit breaker designed for robust electrical protection and control in industrial and commercial settings. It offers reliable safeguarding against overloads and short circuits, making it ideal for power distribution, motor control, and HVAC systems. While its IP65 rating provides excellent protection against dust and water, it's important to ensure it's installed correctly to maintain its enclosure integrity.
| Series | 3LD |
|---|---|
| Model Part Number | 3LD2504-0TK51 |
| Brand | Siemens |
It serves as a main switch or emergency-off switch for safe disconnection of loads in industrial and commercial electrical circuits, providing protection against overloads and short circuits.
The switch disconnector has a nominal current output of 63 A and a voltage rating of up to 690 V AC.
Yes, it has an IP65 rating, which means it is protected against dust ingress and water jets, making it suitable for many outdoor or harsh industrial environments.
Yes, the 3LD series is designed to be used for DC applications in addition to AC applications.
The rotary operating mechanism is typically mounted centrally through a 22.5 mm hole in the enclosure door, coupled to the switch inside.
The product description specifies suitability for 35 mm² wiring.
The dimensions are approximately 106 mm in height, 90 mm in width, and 110.5 mm in depth.
The Siemens 3LD2504-0TK51 is a switch disconnector. While it provides isolation and can break fault currents up to its breaking capacity (1260 A), it is often used in conjunction with separate protective devices like fuses or circuit breakers for full overload and short-circuit protection, depending on the specific application requirements.
Verify that the rotary operating mechanism is correctly aligned and securely attached to the switch. Ensure the door it is mounted on is properly closed and that there are no obstructions preventing movement. Check for internal damage if visible.
Ensure wiring is correctly sized (up to 35 mm²) and securely fastened. Loose connections are a common cause of overheating. De-energize the circuit and re-tighten terminal screws. Check for signs of arcing.
Inspect the door seal and the seals around the rotary actuator. Replace any damaged or worn seals. Ensure the unit is mounted flush against the enclosure panel.
This indicates a potential overload or short circuit condition in the protected circuit. Investigate the load connected to the circuit. Ensure the breaker's rating (63A) is appropriate for the connected equipment. If the issue persists with no apparent overload, consult a qualified electrician to check the circuit and the breaker itself.
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