Schneider Electric LRD3353 TeSys Deca Thermal Overload Relay 23-32A Class 10A, IP20
Schneider Electric LRD3353 TeSys Deca Thermal Overload Relay 23-32A Class 10A, IP20
- MPN: LRD3353
- PPN: SCH-LRD3353
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CAD$217.80/ EA
Description
TeSys LRD thermal overload relay, 32A/1000V, thermal setting range 23-32A, tripping class 10A, for protection of 3-phase motors 15kW@400V. Differential device with phase failure and load unbalance detection. It provides a thermal adjustement dial, a manual-automatic reset selector acting also as reset button, a trip test button for simulation of a tripping, a 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 LC1D80-D95. Mounting on DIN rail or screw fixing, separated from the contactor, with use of a terminal block LA7D3064 (to be ordered separately). Multi standards certified (IEC, UL, CSA, CCC, EAC, ATEX, Marine), Green Premium compliant (RoHs/Reach).
Features
- Specifically engineered for direct mounting beneath TeSys Deca or TeSys D contactors (frames LC1D80 and LC1D95), this thermal overload relay creates a compact, integrated motor starter assembly. This plug-and-play design saves significant cabinet space and eliminates the need for extra wiring, ensuring a professional, vibration-resistant connection in your motor control center.
- Featuring a precision-calibrated adjustment dial, this relay allows you to set the protection threshold exactly to your motor's nameplate current rating. By providing a custom-fit thermal protection curve, it prevents motor burnout caused by phase imbalance or steady-state overloads, significantly extending the service life of expensive industrial pumps, fans, and compressors.
- This relay is rated as Class 10, meaning it is optimized to trip within 10 seconds or less at 600% of the maximum setting. It provides the ideal balance for standard-starting industrial motors—offering enough delay to avoid nuisance tripping during startup while reacting rapidly to genuine fault conditions to protect internal motor windings from overheating.
- Equipped with a versatile selector for manual or automatic reset, this unit gives you total control over your system's recovery logic. The integrated "Stop" and "Test" buttons allow technicians to simulate a trip condition safely during commissioning, ensuring that the N/C and N/O auxiliary contacts correctly trigger your PLC or alarm circuits before the machine goes live.
- Built with advanced differential tripping technology, the LRD3353 is highly sensitive to phase loss and load unbalance. In the event of a single-phasing condition—which is a common cause of rapid motor failure—the relay trips the contactor immediately, shielding your equipment from catastrophic damage and reducing the risk of costly production line downtime.
Specifications
- Thermal Protection Adjustment Range
- 23-32 A
- Rated Current
- 32 A
- Rated Operational Voltage
- 1000 V AC 0...400 Hz power circuit IEC 60947-4-1
- Phase Failure Sensitivity
- tripping current 130 % of Ir on two phases, last phase at 0
- Dielectric Strength
- 2.2 kV 50 Hz IEC 60947-1
- Control Type
- red push-button stop, blue push-button reset
- Net Weight
- 0.51 kg (1.12 lb)
- Connections - Terminals
- power circuit screw clamp terminals 1 4-35 mm² flexible/solid, control circuit screw clamp terminals 2 1-2.5 mm² flexible/solid
- Climatic Withstand
- IACS E10
- Ambient Air Temperature for Storage
- -60 to 70 °C
- Mechanical Robustness
- vibrations 6 Gn IEC 60068-2-6; shocks 15 Gn for 11 ms IEC 60068-2-7
- Flame Retardance
- V1 UL 94
- Product Certifications
- IEC, UL, CSA, CCC, EAC, ATEX, INERIS, UKCA
- Mercury Free
- Yes
- RoHS Compliance
- Compliant, with RoHS Exemption Information and China RoHS declaration
- Environmental Disclosure
- ENVPEP110101EN
- Country of Origin
- France
- Product Compatibility
- LC1D80, LC1D95
- Device Short Name
- LRD
Thermal Overload Classclass 10A IEC 60947-4-1
Network TypeAC, DC
Associated Fuse Rating4 A gG for signalling circuit
Permissible Current (Signalling Circuit)0.72 A 500 V AC-15 signalling circuit, 0.06 A 440 V DC-13 signalling circuit
Rated Insulation Voltagepower circuit 1000 V IEC 60947-4-1; power circuit 600 V CSA and UL
Dimensions (HxWxD)81 x 70 x 115 mm (3.19 x 2.76 x 4.53 in)
Mounting Supportplate, with specific accessories; rail, with specific accessories; under contactor
Tightening Torquecontrol circuit 1.7 N·m screw clamp terminals; power circuit 9 N·m screw clamp terminals
Ambient Air Temperature for Operation-20 to 60 °C without derating IEC 60947-4-1
Temperature Compensation-20 to 60 °C
IP Degree of ProtectionIP20 IEC 60529
Rated Impulse Withstand Voltage6 kV IEC 60947-1
StandardsEN/IEC 60947-4-1, EN/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
Toxic Heavy Metal FreeYes
REACH ComplianceFree of Substances of Very High Concern above threshold
Circularity ProfileENVEOLI1101001
Warranty18 months
Relay Applicationmotor protection
RangeTeSys
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