Siemens 3RN2010-1BW30 Thermistor Motor Protection Relay 24-240V
Siemens 3RN2010-1BW30 Thermistor Motor Protection Relay 24-240V
Manufacturer: Siemens
Product No.: 3RN2010-1BW30
Condition:1000 in stock
Product Type: Motor Protection Relay
Product Origin: 4011209719835
Payment: T/T, Western Union
Weight: 180g
Shipping port: Xiamen
Warranty: 12 months
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Siemens 3RN2010-1BW30 Thermistor Motor Protection Relay
The Siemens 3RN2010-1BW30 is a precision-engineered thermistor motor protection relay from the SIRIUS 3RN2 family, designed to safeguard three-phase motors against thermal overload damage. By continuously monitoring PTC thermistor resistance embedded in motor windings, this relay provides early-warning protection that prevents costly downtime and extends motor service life in industrial environments.
Technical Specifications
- Model Number: 3RN2010-1BW30
- Control Supply Voltage: 24-240V AC/DC (universal input)
- Frequency Range: 50/60 Hz
- Thermistor Input: PTC thermistor monitoring (cold resistance ≤1.5kΩ, trip resistance ≥3.3kΩ)
- Output Contacts: 2 changeover contacts (SPDT), 6A @ 250V AC
- Reset Function: Automatic or manual reset (selectable)
- Response Time: <100ms at trip threshold
- Status Indication: LED indicators for power, trip, and fault conditions
- Mounting: 22.5mm DIN rail (EN 60715)
- Operating Temperature: -25°C to +60°C
- Protection Class: IP20
- Dimensions: 22.5 x 75 x 100mm (W x D x H)
- Weight: 180g
- Certifications: CE, UL, cUL, CCC
Application Scenarios
This thermistor motor protection relay excels in applications where precise thermal monitoring is critical. Common deployment scenarios include:
- HVAC Systems: Protects fan motors, compressors, and pump motors in building automation and climate control installations
- Conveyor Systems: Monitors material handling motors in manufacturing, warehousing, and logistics facilities
- Machine Tools: Safeguards spindle motors, feed drives, and coolant pumps in CNC machining centers
- Process Industries: Protects agitator motors, mixer drives, and circulation pumps in chemical and pharmaceutical production
- Water Treatment: Monitors submersible pumps, aerator motors, and filtration system drives
Advanced Protection Solutions
Unlike traditional thermal overload relays that estimate motor temperature based on current draw, the 3RN2010-1BW30 measures actual winding temperature through PTC thermistors. This direct measurement approach provides superior protection accuracy, especially during locked-rotor conditions, frequent start-stop cycles, or operation in high ambient temperatures.
The relay's universal 24-240V AC/DC supply voltage eliminates the need for multiple relay variants, simplifying inventory management and reducing installation complexity. Selectable automatic or manual reset functionality allows customization based on application safety requirements—automatic reset for unattended operations, manual reset for critical processes requiring operator intervention.
Installation & Integration
The compact 22.5mm width enables space-efficient panel mounting alongside contactors and circuit breakers. Screw terminals accommodate wire sizes from 0.5mm² to 2.5mm², supporting both solid and stranded conductors. The relay integrates seamlessly with Siemens SIRIUS 3R contactors and 3RV motor protection circuit breakers for complete motor control solutions.
Frequently Asked Questions
Q: How many PTC thermistors can this relay monitor?
A: The 3RN2010-1BW30 monitors up to 6 PTC thermistors connected in series. For motors with more than 6 thermistors, use multiple relays or upgrade to the 3RN2012 model with expanded capacity.
Q: What happens if the thermistor circuit is broken?
A: The relay detects open-circuit conditions (>100kΩ resistance) and triggers a fault alarm, preventing unprotected motor operation. This fail-safe design ensures continuous protection integrity.
Q: Can I use this relay with motors that don't have built-in thermistors?
A: No, this relay requires PTC thermistors embedded in motor windings. For motors without thermistors, use thermal overload relays like the Siemens 3RU series that monitor motor current instead.
Q: Is the relay suitable for single-phase motors?
A: Yes, the 3RN2010-1BW30 works with single-phase, two-phase, and three-phase motors, as long as they're equipped with PTC thermistors meeting the specified resistance characteristics.
Warranty & Support
Every Siemens 3RN2010-1BW30 Thermistor Motor Protection Relay includes a comprehensive 12-month manufacturer warranty covering defects in materials and workmanship. Our technical support team provides application engineering assistance, wiring diagrams, and troubleshooting guidance to ensure optimal system performance.
Related Products
| Product | Description | Link |
|---|---|---|
| Siemens 3RU1136-4HB0 | Overload Relay 25-40A for direct motor protection | View Product |
| Siemens 7UT6125-4EB20-1AA0/BB | Differential Protection Relay for transformer/motor protection | View Product |
| Siemens 3RV2011-1GA10 | Circuit Breaker Size S00 for motor branch protection | View Product |
© 2025 INDUSTRIAL CONTROL HUB. All rights reserved.
Original Source: https://www.indctrlhub.com
Contact: sales@indctrlhub.com | +0086 18359243191
Product Description
Siemens 3RN2010-1BW30 Thermistor Motor Protection Relay
The Siemens 3RN2010-1BW30 is a precision-engineered thermistor motor protection relay from the SIRIUS 3RN2 family, designed to safeguard three-phase motors against thermal overload damage. By continuously monitoring PTC thermistor resistance embedded in motor windings, this relay provides early-warning protection that prevents costly downtime and extends motor service life in industrial environments.
Technical Specifications
- Model Number: 3RN2010-1BW30
- Control Supply Voltage: 24-240V AC/DC (universal input)
- Frequency Range: 50/60 Hz
- Thermistor Input: PTC thermistor monitoring (cold resistance ≤1.5kΩ, trip resistance ≥3.3kΩ)
- Output Contacts: 2 changeover contacts (SPDT), 6A @ 250V AC
- Reset Function: Automatic or manual reset (selectable)
- Response Time: <100ms at trip threshold
- Status Indication: LED indicators for power, trip, and fault conditions
- Mounting: 22.5mm DIN rail (EN 60715)
- Operating Temperature: -25°C to +60°C
- Protection Class: IP20
- Dimensions: 22.5 x 75 x 100mm (W x D x H)
- Weight: 180g
- Certifications: CE, UL, cUL, CCC
Application Scenarios
This thermistor motor protection relay excels in applications where precise thermal monitoring is critical. Common deployment scenarios include:
- HVAC Systems: Protects fan motors, compressors, and pump motors in building automation and climate control installations
- Conveyor Systems: Monitors material handling motors in manufacturing, warehousing, and logistics facilities
- Machine Tools: Safeguards spindle motors, feed drives, and coolant pumps in CNC machining centers
- Process Industries: Protects agitator motors, mixer drives, and circulation pumps in chemical and pharmaceutical production
- Water Treatment: Monitors submersible pumps, aerator motors, and filtration system drives
Advanced Protection Solutions
Unlike traditional thermal overload relays that estimate motor temperature based on current draw, the 3RN2010-1BW30 measures actual winding temperature through PTC thermistors. This direct measurement approach provides superior protection accuracy, especially during locked-rotor conditions, frequent start-stop cycles, or operation in high ambient temperatures.
The relay's universal 24-240V AC/DC supply voltage eliminates the need for multiple relay variants, simplifying inventory management and reducing installation complexity. Selectable automatic or manual reset functionality allows customization based on application safety requirements—automatic reset for unattended operations, manual reset for critical processes requiring operator intervention.
Installation & Integration
The compact 22.5mm width enables space-efficient panel mounting alongside contactors and circuit breakers. Screw terminals accommodate wire sizes from 0.5mm² to 2.5mm², supporting both solid and stranded conductors. The relay integrates seamlessly with Siemens SIRIUS 3R contactors and 3RV motor protection circuit breakers for complete motor control solutions.
Frequently Asked Questions
Q: How many PTC thermistors can this relay monitor?
A: The 3RN2010-1BW30 monitors up to 6 PTC thermistors connected in series. For motors with more than 6 thermistors, use multiple relays or upgrade to the 3RN2012 model with expanded capacity.
Q: What happens if the thermistor circuit is broken?
A: The relay detects open-circuit conditions (>100kΩ resistance) and triggers a fault alarm, preventing unprotected motor operation. This fail-safe design ensures continuous protection integrity.
Q: Can I use this relay with motors that don't have built-in thermistors?
A: No, this relay requires PTC thermistors embedded in motor windings. For motors without thermistors, use thermal overload relays like the Siemens 3RU series that monitor motor current instead.
Q: Is the relay suitable for single-phase motors?
A: Yes, the 3RN2010-1BW30 works with single-phase, two-phase, and three-phase motors, as long as they're equipped with PTC thermistors meeting the specified resistance characteristics.
Warranty & Support
Every Siemens 3RN2010-1BW30 Thermistor Motor Protection Relay includes a comprehensive 12-month manufacturer warranty covering defects in materials and workmanship. Our technical support team provides application engineering assistance, wiring diagrams, and troubleshooting guidance to ensure optimal system performance.
Related Products
| Product | Description | Link |
|---|---|---|
| Siemens 3RU1136-4HB0 | Overload Relay 25-40A for direct motor protection | View Product |
| Siemens 7UT6125-4EB20-1AA0/BB | Differential Protection Relay for transformer/motor protection | View Product |
| Siemens 3RV2011-1GA10 | Circuit Breaker Size S00 for motor branch protection | View Product |
© 2025 INDUSTRIAL CONTROL HUB. All rights reserved.
Original Source: https://www.indctrlhub.com
Contact: sales@indctrlhub.com | +0086 18359243191