Schneider Electric TeSys LRD Thermal Overload Relay, 55-70 A, Class 10A
Range: TeSys
Product type: Differential thermal overload relay
Relay application: Motor protection
Control type: Push-button red stop, Push-button Blue reset
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TeSys LRD thermal overload relay, 70A/1000V, thermal setting range 55-70A, tripping class 10A, for protection of 3-phase motors 37kW@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).
Key Features:
Motor Protection: The LRD3361 offers essential motor protection, preventing overheating and potential motor damage.
Class 10A Rating: Classified as Class 10A, this thermal overload relay guarantees dependable protection for motors of various sizes.
Wide Current Range: With a rated current range of 55-70 A, it accommodates diverse motor sizes and applications.
Specifications:
Main | |
| Range | TeSys |
| Product name | TeSys LRD |
| TeSys Deca | |
| Product or component type | Differential thermal overload relay |
| device short name | LRD |
| Relay application | Motor protection |
| Product compatibility | LC1D95 |
| LC1D80 | |
| Network type | DC |
| AC | |
| Thermal overload class | Class 10A conforming to IEC 60947-4-1 |
| Thermal protection adjustment range | 55…70 A |
| [Ui] rated insulation voltage | Power circuit: 1000 V conforming to IEC 60947-4-1 |
| Power circuit: 600 V conforming to CSA | |
| Power circuit: 600 V conforming to UL | |
| Complementary | |
| Network frequency | 0...400 Hz |
| Mounting support | Plate, with specific accessories |
| Rail, with specific accessories | |
| Under contactor | |
| Tripping threshold | 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1 |
| Auxiliary contact composition | 1 NO + 1 NC |
| [Ith] conventional free air thermal current | 5 A for signalling circuit |
| Permissible current | 0.72 A at 500 V AC-15 for signalling circuit |
| 0.06 A at 440 V DC-13 for signalling circuit | |
| [Ue] rated operational voltage | 1000 V AC 0...400 Hz for power circuit conforming to IEC 60947-4-1 |
| Associated fuse rating | 4 A gG for signalling circuit |
| 4 A BS for signalling circuit | |
| [Uimp] rated impulse withstand voltage | 6 kV conforming to IEC 60947-1 |
| Phase failure sensitivity | Tripping current 130 % of Ir on two phase, the last one at 0 |
| Control type | Red push-button: stop |
| Blue push-button: reset | |
| Temperature compensation | -20…60 °C |
| Connections - terminals | Power circuit: screw clamp terminals 1 cable(s) 4…35 mm² flexible without cable end |
| Power circuit: screw clamp terminals 1 cable(s) 4…35 mm² flexible with cable end | |
| Power circuit: screw clamp terminals 1 cable(s) 4…35 mm² solid without cable end | |
| Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² flexible without cable end | |
| Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² flexible with cable end | |
| Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² solid without cable end | |
| Tightening torque | Control circuit: 1.7 N.m - on screw clamp terminals |
| Power circuit: 9 N.m - on screw clamp terminals | |
| height | 81 mm |
| Width | 70 mm |
| Depth | 115 mm |
| Net weight | 0.51 kg |
| Environment | |
| Climatic withstand | Conforming to IACS E10 |
| IP degree of protection | IP20 conforming to IEC 60529 |
| Ambient air temperature for operation | -20…60 °C without derating conforming to IEC 60947-4-1 |
| Ambient air temperature for storage | -60…70 °C |
| Flame retardance | V1 conforming to UL 94 |
| Mechanical robustness | Vibrations: 6 Gn conforming to IEC 60068-2-6 |
| Shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7 | |
| Dielectric strength | 2.2 kV at 50 Hz conforming to IEC 60947-1 |
| standards | EN/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 | |
| product certifications | IEC |
| UL | |
| CSA | |
| CCC | |
| EAC | |
| ATEX INERIS | |
| UKCA |
| Weight | 0.510000 |
|---|---|
| Brand | Schneider Electric |
| Model | LRD3361 |
| Depth [cm] | 11.5 |
| Width [cm] | 7 |
| Height [cm] | 8.1 |
| Range | Tesys D |
| Family | PPCTR |
| IP Degree of Protection | IP20 |
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