Schneider Electric TeSys LRD Thermal Overload Relays 30-40A Class 10A LRD3355
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Brand : Schneider Electric
Type : Thermal Overload Relays
Description
Schneider Electric LRD3355 TeSys LRD Thermal Overload Relay is a protective device used in electrical systems to prevent motors or other equipment from overheating and potentially causing damage or starting a fire. It monitors the current flowing through the motor and trips if it exceeds a certain threshold for an extended period of time.
30-40A is the current range the thermal overload relay is designed for. This makes it suitable for motors with a current draw between 30 and 40 amps. Class 10A is the thermal overload relay trip class. The trip class defines how quickly the relay responds to an overload condition. In this case, Class 10A means that the relay will trip if the current exceeds the specified threshold within 10 seconds.
Schneider Electric LRD3355 TeSys LRD Thermal Overload Relay is used in applications where the normal operating current of the motor is in the range of 30-40 A and a relatively quick response to overloads (within 10 seconds) is required to protect the motor.
Features
- 30-40A Th Overload Relay
- Protect motors from overloads and phase failures
- Easier to install and operate with multi-standard screws
| Brand | Schneider Electric |
| Item Name | Thermal Overload Relays |
| Model | LRD3355 |
| Conventional Free Air Thermal Current | 5 A for Signalling Circuit |
| Rated Operational Voltage Limits | 1000 V AC 0...400 Hz for power circuit conforming to IEC 60947-4-1 |
| 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 |
| Rated Impulse Withstand Voltage | 6 kV conforming to IEC 60947-1 |
| Ambient Air Temperature For Operation | -20-60 °C without derating conforming to IEC 60947-4-1 |
| Ambient Air Temperature For Storage | -60-70 °C |
| Associated Fuse Rating | 4 A gG for signalling circuit, 4 A BS for signalling circuit |
| Auxiliary Contact Composition | 1 NO + 1 NC |
| Climatic Withstand | Conforming to IACS E10 |
| Compatibility Code | LRD |
| 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 |
| Control Type | Red Push-button: stop, blue push-button: reset |
| Depth | 115 mm |
| Dielectric Strength | 2.2 kV at 50 Hz conforming to IEC 60947-1 |
| Flame Retardance | V1 conforming to UL 94 |
| Height | 81 mm |
| IP Degree Of Protection | IP20 Conforming to IEC 60529 |
| Mechanical Robustness | vibrations: 6 Gn conforming to IEC 60068-2-6, shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7 |
| Mounting Support | Plate, with specific accessories, rail, with specific accessories, under contactor |
| Network Frequency | 0...400 Hz |
| Network Type | DC, AC |
| Permissible Current | 0.72 A at 500 V AC-15 for signalling circuit, 0.06 A at 440 V DC-13 for signalling circuit |
| Phase Failure Sensitivity | Tripping Current 130 % of Ir on two phase, the last one at 0 |
| Certifications | IEC, UL, CSA, CCC, EAC, ATEX INERIS, UKCA |
| Compatibility | LC1D80, LC1D95 |
| Range | TeSys |
| Relay Application | Motor Protection |
| 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 |
| Tightening Torque | control circuit: 1.7 N.m - on screw clamp terminals, power circuit: 9 N.m - on screw clamp terminals |
| Width | 70 mm |
| Temperature Compensation | -20-60 °C |
| Thermal Overload Class | Class 10A conforming to IEC 60947-4-1 |
| Thermal Protection Adjustment Range | 30-40 A |
| Tripping Threshold | 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1 |
| Mechanical Robustness | Vibrations : 6 Gn conforming to IEC 60068-2-6, shocks: 15 Gn for11 ms conforming to IEC 60068-2-7 |
| Weight | 0.51 kg |
