Technical Review: Siemens 3RU61161DB1 Overload Relay 2.2-3.2A S00 Level 10 - Selection Guide & Specs
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Overview
The Siemens 3RU61161DB1 Overload Relay addresses the critical industrial challenge of motor protection against overload conditions that can lead to costly downtime and equipment damage. This S00 Level 10 relay provides precise current monitoring for motors in the 2.2-3.2A range, ensuring reliable operation in demanding industrial environments.
Technical Analysis
The Siemens 3RU61161DB1 is part of the proven Siemens overload relay family, designed for integration with motor control systems. Its compact S00 design makes it ideal for space-constrained applications while maintaining robust protection capabilities.
| Specification | Value |
|---|---|
| Current Range | 2.2 - 3.2 A |
| Frame Size | S00 |
| Level | 10 |
| Installation Type | Independent Installation |
| Main Circuit Connection | Screw Terminal |
| Auxiliary Circuit Connection | Screw Terminal |
| Protection Class | IP20 |
| Ambient Temperature Range | -25°C to +60°C |
| Standards Compliance | IEC/EN 60947-4-1, UL 508 |
| Contact Configuration | 1 NO + 1 NC |
Buying Considerations
When selecting the Siemens 3RU61161DB1 overload relay, consider these critical factors:
Motor Current Rating: Ensure your motor's full load current falls within the 2.2-3.2A range. For motors outside this range, explore other Siemens overload relays with appropriate current settings.
Control System Integration: Verify compatibility with your existing motor starters and contactors. The S00 frame size is designed for compact control panel applications.
Environmental Conditions: The IP20 protection rating makes it suitable for indoor industrial environments. For harsh conditions, consider additional enclosure protection.
Auxiliary Contact Requirements: The 1 NO + 1 NC contact configuration supports standard control and signaling applications. For complex control schemes, additional auxiliary contact blocks may be required.
Frequently Asked Questions
Q: What is the difference between Level 10 and other overload relay levels?
A: Level 10 refers to the trip class, indicating the relay will trip within 10 seconds at 600% of the set current. This provides faster protection compared to standard Class 10 relays, making it suitable for applications requiring rapid motor protection.
Q: Can the Siemens 3RU61161DB1 be used with variable frequency drives?
A> Yes, but additional coordination with the VFD protection system is recommended. The relay provides backup thermal protection for the motor, while the drive handles electronic overload protection.
Q: How do I properly set the current adjustment on this overload relay?
A> The current setting should match the motor's full load current as specified on the motor nameplate. Use the adjustment dial to set the current between 2.2-3.2A, ensuring it's calibrated to the motor's actual operating conditions for optimal protection.
