Schneider Electric LRD3357 TeSys Deca Thermal Overload Relay 37-50A Class 10A
Schneider Electric LRD3357 TeSys Deca Thermal Overload Relay 37-50A Class 10A
- MPN: LRD3357
- PPN: SCH-LRD3357
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CAD$241.22/ EA
Description
TeSys LRD thermal overload relay, 50A/1000V, thermal setting range 37-50A, tripping class 10A, for protection of 3-phase motors 22kW@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).
Specifications
- Amperage
- 37-50 A
- Voltage
- 1000 V AC 0-400 Hz power circuit IEC 60947-4-1
- Auxiliary Contact Composition
- 1 NO + 1 NC
- Permissible Current
- 0.72 A 500 V AC-15, 0.06 A 440 V DC-13 signalling circuit
- Rated Impulse Withstand Voltage
- 6 kV IEC 60947-1
- Control Type
- Red push-button stop, Blue push-button reset
- Network Type
- AC, DC
- Connections - Terminals
- Power circuit screw clamp terminals 1 4-35 mm² flexible/solid, with or without cable end; Control circuit screw clamp terminals 2 1-2.5 mm² flexible/solid, with or without cable end
- Height
- 81 mm (3.19 in)
- Depth
- 115 mm (4.53 in)
- Thermal Compensation
- -20 to 60 °C (-4 to 140 °F)
- Ambient Air Temperature for Storage
- -60 to 70 °C (-76 to 158 °F)
- Dielectric Strength
- 2.2 kV 50 Hz IEC 60947-1
- Flame Retardance
- V1 UL 94
- Product Certifications
- IEC, UL, CSA, CCC, EAC, ATEX, INERIS, UKCA
- REACH Compliance
- Free of SVHC
- Toxic Heavy Metal Free
- Yes
- Warranty
- 18 months
Thermal Overload ClassClass 10A IEC 60947-4-1
Tripping Threshold1.14 ± 0.06 Ir IEC 60947-4-1
Conventional Free Air Thermal Current5 A signalling circuit
Associated Fuse Rating4 A gG, 4 A BS signalling circuit
Phase Failure SensitivityTripping current 130% of Ir on two phases, last phase at 0
Thermal Protection Adjustment Range37-50 A
Network Frequency0-400 Hz
Tightening TorqueControl circuit 1.7 N·m, Power circuit 9 N·m screw clamp terminals
Width70 mm (2.76 in)
Net Weight0.51 kg (1.12 lb)
Ambient Air Temperature for Operation-20 to 60 °C (-4 to 140 °F) without derating IEC 60947-4-1
Mechanical RobustnessVibrations 6 Gn IEC 60068-2-6, Shocks 15 Gn for 11 ms IEC 60068-2-7
IP Degree of ProtectionIP20 IEC 60529
StandardsIEC 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 OriginFrance
EU RoHS ComplianceCompliant
Mercury FreeYes
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CAD$241.22/ EA
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