Schneider Electric LRD14 TeSys Deca Thermal Overload Relay, 690VAC, 7-10A, 1NO+1NC, Class 10A
Schneider Electric LRD14 TeSys Deca Thermal Overload Relay, 690VAC, 7-10A, 1NO+1NC, Class 10A
- MPN: LRD14
- PPN: SCH-LRD14
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CAD$124.05/ EA
Description
TeSys LRD thermal overload relay, 10A/690V, thermal setting range 7-10A, tripping class 10A, for protection of 3-phase motors 4kW@400V. Differential device with phase failure and load unbalance detection. It provides a thermal adjustement dial, a manual-automatic reset selector, a test selector for simulation of a tripping, reset and stop buttons, 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 LC1D09-D38. Mounting on DIN rail or screw fixing, separated from the contactor, with use of a terminal block LAD7B106 (to be ordered separately). Multi standards certified (IEC, UL, CSA, CCC, EAC, ATEX, Marine), Green Premium compliant (RoHs/Reach).
Features
- The LRD14 is a TeSys Deca differential thermal overload relay designed to protect AC motors from overloads and phase failures. It monitors the current drawn by the motor and automatically trips the associated contactor if the current stays above the set limit for too long, preventing permanent damage to the motor windings from excessive heat.
- Featuring an adjustable current setting range of 7 to 10 Amps, the LRD14 allows for precision calibration based on your motor's Full Load Amps (FLA). By using the integrated dial to match the motor's nameplate rating, you ensure a custom protection profile that prevents nuisance tripping while providing a critical safety net against mechanical jams or electrical faults.
- This relay is "differential," meaning it is specifically engineered to detect phase loss or phase unbalance. If one phase fails—a common cause of rapid motor burnout—the LRD14 detects the discrepancy between the phases and trips faster than a standard relay, shielding your equipment from catastrophic failure even under partial power conditions.
- The LRD14 is equipped with 1 NO (Normally Open) + 1 NC (Normally Closed) auxiliary contacts. These allow you to integrate the relay into your control logic; the NC contact is used to drop out the contactor coil, while the NO contact can be wired to a PLC input or a "Fault" pilot light to alert operators exactly why the machine has stopped.
- The relay features a selector blue lever that allows you to choose between Manual or Automatic reset. In Manual mode, a technician must physically inspect the machine and press the reset button after a trip, ensuring the cause of the overload is addressed. Automatic mode is ideal for remote installations where the motor can safely restart once it has cooled down.
Specifications
- Voltage
- 690 V AC
- Thermal Overload Class
- Class 10A IEC 60947-4-1
- Rated Insulation Voltage
- 600 V CSA, 600 V UL, 690 V IEC 60947-4-1
- Tripping Threshold
- 1.14 ± 0.06 × Ir IEC 60947-4-1
- Rated Operational Voltage
- 690 V AC 0-400 Hz IEC 60947-4-1
- Phase Failure Sensitivity
- 130% of Ir on two phase
- Control Type
- Red stop push-button, Blue reset push-button
- Connection
- Screw clamp terminals 1-10 mm² flexible and solid wire
- Dimensions (HxWxD)
- 66 mm x 45 mm x 70 mm (2.60 in x 1.77 in x 2.76 in)
- Protection Degree
- IP20 IEC 60529
- Storage Temperature Range
- -60 to 70 °C (-76 to 158 °F)
- Mechanical Robustness
- Vibrations 6 Gn IEC 60068-2-6, Shocks 15 Gn for 11 ms IEC 60068-2-7
- Standards Compliance
- IEC 60947-4-1, IEC 60947-5-1, UL 60947-4-1, UL 60947-5-1, CSA C22.2 No 60947-4-1, CSA C22.2 No 60947-5-1, GB/T 14048.4, GB/T 14048.5, EN 50495
- Country of Origin
- France
Current Adjustment Range7-10 A
Auxiliary Contacts1 NO + 1 NC
Network TypeAC, DC
Permissible Current3 A 120 V AC-15, 0.22 A 125 V DC-13 signalling circuit
Impulse Withstand Voltage6 kV
Mountingplate, rail, under contactor with accessories
Temperature Compensation-20 to 60 °C IEC 60947-4-1
Tightening Torque1.7 N·m screw clamp terminals
Weight0.124 kg (0.27 lb)
Operating Temperature Range-20 to 60 °C (-4 to 140 °F) without derating IEC 60947-4-1
Flame RetardanceV1 UL 94
Dielectric Strength1.89 kV 50 Hz IEC 60947-1
CertificationsIEC, UL, CSA, CCC, EAC, BV, RINA, DNV-GL, Lloyds Register, ATEX, INERIS, UKCA
Warranty18 months
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