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It monitors the motor's current and temperature, tripping the circuit when overload or phase failure occurs to prevent damage and ensure safe operation. Compact and easy to install, this thermal relay is an essential component in motor control systems.
Accurate Overload Protection: Uses bimetallic elements to detect current overloads, providing precise and responsive protection.
Phase Failure Detection: Automatically trips the circuit in case of single-phasing, which can cause motor damage.
Adjustable Tripping Current: Current settings can be adjusted between 0.1A and 100A to match different motor ratings.
Thermal Memory Effect: Maintains tripping status until manually reset, preventing accidental restart during fault conditions.
IP20 Protection: Dust-protected design suitable for standard industrial environments.
The LR2 D Series D13 is widely applied in:
Motor Control Centers: Protects induction motors in pumps, fans, compressors, and conveyor belts.
Industrial Automation: Used in PLC-controlled systems to ensure motor safety in manufacturing processes.
HVAC Systems: Safeguards motors in air conditioning units and ventilation systems from overloads.
Renewable Energy: Protects motors in wind turbines and solar tracking systems from abnormal operating conditions.
Q: How does the thermal relay reset?
A: It can be reset manually using the reset button or automatically after a cool-down period, depending on the model.
Q: Can it be used with variable frequency drives (VFDs)?
A: Yes, it is compatible with VFDs, but proper setting adjustment is required to account for the drive's output characteristics.
Q: What is the response time for overload detection?
A: The relay trips within 2-20 seconds for overloads 1.5 times the rated current, adhering to IEC standards.
Q: Is there a version with remote monitoring?
A: Basic models offer local status indication, while advanced versions with auxiliary contacts can be connected to control panels for remote monitoring.
Type | Rated working current of thermal relay | Thermal component | ||
Rated current (A) | Rated or scale of rated current (A) | |||
LR2-D13 | 25 | LR2-D1301 | 0.16 | 0.10-0.16 |
LR2-D1302 | 0.25 | 0.16-0.25 | ||
LR2-D1303 | 0.40 | 0.25-0.40 | ||
LR2-D1304 | 0.63 | 0.40-0.63 | ||
LR2-D1305 | 1.0 | 0.63-1.0 | ||
LR2-D1306 | 1.6 | 1.0-1.6 | ||
LR2-D13X6 | 2.0 | 1.25-2.0 | ||
LR2-D1307 | 2.5 | 1.6-2.5 | ||
LR2-D1308 | 4.0 | 2.5-4.0 | ||
LR2-D1310 | 6.0 | 4.0-6.0 | ||
LR2-D1312 | 8.0 | 5.5-8.0 | ||
LR2-D1314 | 10.0 | 7.0-10.0 | ||
LR2-D1316 | 13.0 | 9.0-13.0 | ||
LR2-D1321 | 18.0 | 12.0-18.0 | ||
LR2-D1322 | 25.0 | 17.0-25.0 | ||
LR2-D23 | 36 | LR2-D2353 | 32 | 23.0-32.0 |
LR2-D2355 | 36 | 28.0-36.0 | ||
LR2-D33 | 93 | LR2-D3353 | 32 | 23.0-32.0 |
LR2-D3355 | 40 | 30.0-40.0 | ||
LR2-D3357 | 50 | 37.0-50.0 | ||
LR2-D3359 | 65 | 48.0-65.0 | ||
LR2-D3361 | 70 | 55.0-70.0 | ||
LR2-D3363 | 90 | 63.0-80.0 | ||
LR2-D3365 | 93 | 80.0-93.0 | ||
It monitors the motor's current and temperature, tripping the circuit when overload or phase failure occurs to prevent damage and ensure safe operation. Compact and easy to install, this thermal relay is an essential component in motor control systems.
Accurate Overload Protection: Uses bimetallic elements to detect current overloads, providing precise and responsive protection.
Phase Failure Detection: Automatically trips the circuit in case of single-phasing, which can cause motor damage.
Adjustable Tripping Current: Current settings can be adjusted between 0.1A and 100A to match different motor ratings.
Thermal Memory Effect: Maintains tripping status until manually reset, preventing accidental restart during fault conditions.
IP20 Protection: Dust-protected design suitable for standard industrial environments.
The LR2 D Series D13 is widely applied in:
Motor Control Centers: Protects induction motors in pumps, fans, compressors, and conveyor belts.
Industrial Automation: Used in PLC-controlled systems to ensure motor safety in manufacturing processes.
HVAC Systems: Safeguards motors in air conditioning units and ventilation systems from overloads.
Renewable Energy: Protects motors in wind turbines and solar tracking systems from abnormal operating conditions.
Q: How does the thermal relay reset?
A: It can be reset manually using the reset button or automatically after a cool-down period, depending on the model.
Q: Can it be used with variable frequency drives (VFDs)?
A: Yes, it is compatible with VFDs, but proper setting adjustment is required to account for the drive's output characteristics.
Q: What is the response time for overload detection?
A: The relay trips within 2-20 seconds for overloads 1.5 times the rated current, adhering to IEC standards.
Q: Is there a version with remote monitoring?
A: Basic models offer local status indication, while advanced versions with auxiliary contacts can be connected to control panels for remote monitoring.
Type | Rated working current of thermal relay | Thermal component | ||
Rated current (A) | Rated or scale of rated current (A) | |||
LR2-D13 | 25 | LR2-D1301 | 0.16 | 0.10-0.16 |
LR2-D1302 | 0.25 | 0.16-0.25 | ||
LR2-D1303 | 0.40 | 0.25-0.40 | ||
LR2-D1304 | 0.63 | 0.40-0.63 | ||
LR2-D1305 | 1.0 | 0.63-1.0 | ||
LR2-D1306 | 1.6 | 1.0-1.6 | ||
LR2-D13X6 | 2.0 | 1.25-2.0 | ||
LR2-D1307 | 2.5 | 1.6-2.5 | ||
LR2-D1308 | 4.0 | 2.5-4.0 | ||
LR2-D1310 | 6.0 | 4.0-6.0 | ||
LR2-D1312 | 8.0 | 5.5-8.0 | ||
LR2-D1314 | 10.0 | 7.0-10.0 | ||
LR2-D1316 | 13.0 | 9.0-13.0 | ||
LR2-D1321 | 18.0 | 12.0-18.0 | ||
LR2-D1322 | 25.0 | 17.0-25.0 | ||
LR2-D23 | 36 | LR2-D2353 | 32 | 23.0-32.0 |
LR2-D2355 | 36 | 28.0-36.0 | ||
LR2-D33 | 93 | LR2-D3353 | 32 | 23.0-32.0 |
LR2-D3355 | 40 | 30.0-40.0 | ||
LR2-D3357 | 50 | 37.0-50.0 | ||
LR2-D3359 | 65 | 48.0-65.0 | ||
LR2-D3361 | 70 | 55.0-70.0 | ||
LR2-D3363 | 90 | 63.0-80.0 | ||
LR2-D3365 | 93 | 80.0-93.0 | ||
