Documentation & Downloads
Schneider Electric LR2K0310 TeSys Differential Thermal Overload Relay, 2.6-3.7A, Class 10A, 45mm Width
- MPN: LR2K0310
- PPN: SCH-LR2K0310
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Description
TeSys LRK thermal overload relay, 3.7A/690V, thermal setting range 2.6-3.7A, tripping class 10A, for protection of 3-phase motors 1.1-1.5kW@400V. Differential device with phase failure and load unbalance detection. It provides a thermal adjustement dial, a manual-automatic reset selector, a test slide switch for simulation of a tripping, reset/stop button, a flag indicator and 2 auxiliary contacts 1NO+1NC for fault signalling. Settings are protected by a transparent cover lockable by sealing. Connection by screw clamp terminals, it connects directly to the bottom terminals of 3-pole contactors LC1K06-K16. Mounting on DIN rail, separated from the contactor, with use of a terminal block LA7K0064 (to be ordered separately). Multi standards certified (IEC, UL, CSA, CCC, EAC), Green Premium compliant (RoHs/Reach).
Features
- This TeSys K differential thermal overload relay features integrated phase failure sensitivity that continuously monitors current balance across all three phases. If a single-phasing event or a critical phase unbalance occurs, the internal mechanism trips rapidly to cut power to the control circuit, protecting your expensive 3-phase fractional-horsepower motors from catastrophic overheating and premature winding burnout.
- quipped with an adjustable thermal setting dial, this relay provides a precise current adjustment range of 2.60 to 3.70 A. This localized adjustment wheel lets maintenance technicians fine-tune the trip threshold to match the exact nameplate FLA of small pumps, fans, or conveyor drives, eliminating nuisance tripping while ensuring strict compliance with Canadian Electrical Code overcurrent protection standards.
- Designed for seamless, plug-and-play mechanical integration, this overload relay clips and bolts directly onto the bottom terminals of the TeSys K miniature contactor series (such as the LC1K or LP1K). This direct-mounting architecture eliminates the need for extra interconnecting wires, reduces labor times, and keeps your overall control assembly footprint remarkably compact on the DIN rail.
- This device comes factory-equipped with 1 NO (Normally Open) and 1 NC (Normally Closed) auxiliary contacts rated for standard industrial control circuits. The NC contact wires directly into your contactor coil loop to drop out power during a fault, while the NO contact simultaneously signals a local pilot light or routes a discrete digital input back to a supervisory PLC for immediate fault diagnosis.
- Featuring a versatile, multi-function selector button on the front face, this relay supports four distinct operating modes: Manual Reset, Automatic Reset, Test, and Stop. This allows plant engineers to lock the unit in manual mode to force a physical technician inspection after a fault, or switch it to automatic mode for remote, unstaffed pump stations where the unit must self-reset once the internal bi-metallic strips cool down.
- The finger-safe IP2x housings feature captive screws that maintain a consistent tightening torque of 1.3 N.m, preventing loose connections, localized resistance heating, and intermittent signal drops on high-vibration factory floors.
Documentation & Downloads
Specifications
Additional
- Amperage
- 2.6-3.7 A
- Rated Insulation Voltage
- power circuit 690 V BS 4941, IEC 60947, 750 V VDE 0110 group C, 600 V CSA C22.2 No 14
- Network Frequency
- <= 400 Hz
- Thermal Protection Adjustment Range
- 2.6-3.7 A
- Width
- 45 mm
- Depth
- 65 mm
- Tightening Torque
- 1.3 N.m (screw clamp terminals)
- Mounting
- DIN rail or under contactor plate with specific accessories
- Fire Resistance
- 850 °C IEC 60695-2-1
- Auxiliary Contacts
- 1 NO + 1 NC
- Product Certifications
- UL, CSA, UKCA
- Operating Altitude
- 2000 m without derating
- Ambient Temperature for Storage
- -40 to 70 °C
- Mercury Free
- Yes
- Control Type
- red push-button trip test, blue push-button stop/manual reset, selector switch manual/automatic reset
- Associated Fuse Rating
- 6 A gG for signalling circuit conforming to VDE 0660 and IEC 60947
- Network Type
- AC, DC
Voltage<= 690 V power circuit, 690 V AC AC-15 signalling circuit, 250 V DC DC-13 signalling circuit
Rated Impulse Withstand Voltage6 kV
Thermal Overload ClassClass 10A IEC 60947-4-1
IP Degree of ProtectionIP2X IEC 60529
Height58 mm
Net Weight0.145 kg
Connection Typescrew clamp terminals 0.34-4 mm² solid and flexible, with or without cable end
MaterialFlame retardant V1 UL 94
Phase Protectionphase failure and load unbalance detection IEC 60947-4-1
StandardsIEC 60947, VDE 0660, BS 4941, NF C 63-650
RoHS ComplianceYes, compliant with exemptions
Ambient Temperature for Operation-20 to 55 °C without derating, -30 to 60 °C with derating IEC 60947
Protective TreatmentTC IEC 60068, TC DIN 50016
Product CompatibilityLC7K, LP1K, LP4K, LC1K
Relay Applicationmotor protection
Device Short NameLR2K
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CAD
$65.34
/ EA
Available to Order
Lead times may vary. For an accurate estimate please contact us.
Company Stock:
0
Looking to buy a large quantity?
To view product inventory
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