Schneider Electric LRD10 TeSys Deca Thermal Overload Relay, 690VAC, 4-6A, 3P, Class 10A
Schneider Electric LRD10 TeSys Deca Thermal Overload Relay, 690VAC, 4-6A, 3P, Class 10A
- MPN: LRD10
- PPN: SCH-LRD10
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CAD$124.05/ EA
Description
TeSys LRD thermal overload relay, 6A/690V, thermal setting range 4-6A, tripping class 10A, for protection of 3-phase motors 2.2kW@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 LRD10 is a TeSys Deca differential thermal overload relay designed to protect AC motors against overloads and phase failures. It acts as a fail-safe by monitoring the current flowing to the motor and automatically tripping the associated contactor if the current exceeds the set limit for a specific duration, preventing motor burnout and costly equipment replacement.
- Featuring a precise current adjustment dial ranging from 4 to 6 Amps, the LRD10 allows you to match the protection profile exactly to your motor's Full Load Amps (FLA). This level of customization ensures that the relay provides a tight safety margin, preventing nuisance trips during normal operation while reacting instantly to genuine mechanical overloads.
- This relay features a "differential" design, making it highly sensitive to phase loss or phase unbalance. If one phase fails—a leading cause of motor failure—the LRD10 detects the discrepancy and trips faster than a standard overload, shielding your motor from the rapid heat buildup that occurs during single-phasing conditions.
- The LRD10 is equipped with 1 NO (Normally Open) + 1 NC (Normally Closed) auxiliary contacts. These are used to integrate the overload into your control circuit; the NC contact is wired to stop the contactor, while the NO contact can be used to trigger a "Fault" pilot light or send a status signal to a PLC, providing immediate diagnostic feedback.
- The unit features a blue lever that allows you to choose between Manual or Automatic reset modes. Manual mode ensures a technician must inspect the machine before restarting, while the integrated "Test" and "Stop" buttons allow for safe verification of the control circuit and manual simulation of a trip condition without disconnecting any wiring.
Specifications
- Current Range
- 4-6 A
- Tripping Threshold
- 1.14 ± 0.06 Ir IEC 60947-4-1
- Operating Voltage
- 690 V AC 0-400 Hz
- Impulse Withstand Voltage
- 6 kV
- Motor Power Rating
- 2.2 kW @ 400 V
- Auxiliary Contacts
- 1 NO + 1 NC
- Mounting
- DIN rail or screw fixing (with terminal block LAD7B106)
- Dimensions (H x W x D)
- 66 mm x 45 mm x 70 mm (2.60 in x 1.77 in x 2.76 in)
- Ingress Protection Rating
- IP20 IEC 60529
- Mechanical Robustness
- Vibrations 6 Gn IEC 60068-2-6, Shocks 15 Gn 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, ATEX, CCC, EAC, UKCA
Thermal ClassClass 10A IEC 60947-4-1
Phase Failure SensitivityTripping current 130% of Ir on two phases
Rated Insulation Voltage600 V CSA, 600 V UL, 690 V IEC 60947-4-1
Permissible Current3 A 120 V AC-15, 0.22 A 125 V DC-13
Relay TypeDifferential thermal overload relay
Control TypeRed push-button stop, Blue push-button reset
Temperature Compensation Range-20 to 60 °C (-4 to 140 °F)
Weight0.124 kg (0.27 lb)
Flame RetardanceV1 UL 94
Dielectric Strength1.89 kV 50 Hz IEC 60947-1
Country of OriginFrance
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CAD$124.05/ EA
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