Description
Siemens 3RB1257-0KM00: Reliable Thermal Overload Relay for Motor Protection
When it comes to safeguarding your motors from overheating and ensuring smooth operations, the Siemens 3RB1257-0KM00 thermal overload relay stands out as a dependable choice. From my experience, this model is particularly well-suited for industrial environments where precision and durability are non-negotiable.
Key Features
- Adjustable Current Range: The 3RB1257-0KM00 offers a wide current adjustment range, making it adaptable to various motor sizes without requiring additional components.
- Compact Design: Its space-saving form factor allows for easy integration into control panels, even in tight spaces.
- Manual/Automatic Reset Options: You can choose between manual or automatic reset modes depending on your operational preferences, adding flexibility to maintenance routines.
- Integrated Trip Indicators: A clear visual indicator signals when the relay has tripped, helping technicians quickly identify issues during troubleshooting.
Technical Specifications
| Specification | Details |
|---|---|
| Brand/Model | Siemens / 3RB1257-0KM00 |
| HS Code | 85364900 |
| Power Requirements | Auxiliary voltage: 24V DC / 230V AC |
| Dimensions & Weight | Width: 45mm, Depth: 70mm, Height: 120mm; Approx. 0.5kg |
| Operating Temperature | -25°C to +60°C (-13°F to +140°F) |
| Signal Input/Output Types | NO/NC auxiliary contacts |
| Communication Interfaces | None (standalone device) |
| Installation Method | DIN rail mounting or screw-fixed installation |
Application Fields
The Siemens 3RB1257-0KM00 finds its place in industries that rely heavily on motor-driven machinery. It’s commonly used in manufacturing plants for conveyor systems, pumps, compressors, and HVAC equipment. One thing I appreciate is how seamlessly it integrates into existing setups, reducing downtime while enhancing safety protocols. In many cases, customers have noted improved reliability after switching to this model due to its robust build quality and precise trip settings.
Advantages & Value
Procurement teams often highlight several key benefits of choosing the 3RB1257-0KM00. First, its compatibility with a wide range of Siemens contactors simplifies system design and reduces spare parts inventory. Second, the cost savings over time are significant thanks to reduced motor failures and extended equipment lifespans. Additionally, Siemens’ reputation for excellent technical support ensures you won’t be left stranded if questions arise during setup or operation.
Installation & Maintenance
Installing the 3RB1257-0KM00 is straightforward, provided you follow standard cabinet practices. Ensure proper ventilation around the unit to prevent overheating, and adhere to wiring guidelines outlined in the user manual. Safety precautions include de-energizing circuits before handling the relay and verifying all connections post-installation. Routine maintenance typically involves periodic inspections for dust accumulation and occasional recalibration of the current setting dial. Firmware updates aren’t applicable here since this is a purely electromechanical device.
Quality & Certifications
This product carries essential certifications such as CE, UL, and RoHS compliance, ensuring it meets global standards for safety and environmental responsibility. Siemens backs the 3RB1257-0KM00 with a standard warranty policy covering defects in materials and workmanship for up to 12 months from the date of purchase.
Note: For urgent orders, we recommend confirming stock availability beforehand. Delivery times vary based on location but typically fall within one week for items in stock.
Reviews
There are no reviews yet.