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Specification & Description
| Specification | Description |
|---|---|
| Part Number | LT3SM00ED |
| Manufacturer | Schneider |
| Product Series | LT3 |
| Device Short Name | LT3SE |
| Product Type | Thermistor Protection Unit |
| Control Circuit Voltage | 24...48 V DC |
| Reset Type | Manual |
| Contacts Type and Composition | 1 NC + 1 NO dual voltage |
| Conventional Free Air Thermal Current | 5 A for output control relay |
| Rated Insulation Voltage | Output control relay: 500 V AC |
| Rated Operational Voltage | 250 V AC 50/60 Hz for output control relay |
| Signalling Function | Fault indication, Voltage indication |
| Control Type | Manual test, Manual reset |
| Probe Interchangeability | Label mark A conforming to IEC 60034-11 |
| Hold-in Power Consumption | In W: 1 W, In VA: 2.5 VA |
| Resistance | 1500…1650 Ohm reset, 2700…3100 Ohm tripping |
| Number of Probes | 0…6 |
| Input Voltage for Probe | < 2.5 V (1500 Ohm), < 7.5 V (4000 Ohm) conforming to IEC 60034-11 |
| Maximum Short Circuit Detection Resistance | 20 Ohm |
| Condition of Use | Connection of probes 1000 m for ≥ 2.5 mm², Connection of probes 500 m for ≥ 1.5 mm² |
| Rated Impulse Withstand Voltage | 2.5 kV |
| Rated Power in VA | 100 VA at 220 V - electrical durability: 500000 cycles |
| Breaking Capacity | 2 A at 24 V DC DC-13, 3 A at 250 V AC AC-16, 6 A at 120 V AC AC-16 |
| Connections - Terminals | Power circuit: cage type connector for cables 0.75...2.5 mm² |
| Tightening Torque | 0.8 N.m |
| Dimensions (H x W x D) | 100 mm x 22.5 mm x 100 mm |
| Product Weight | 0.22 kg |
| IP Degree of Protection | IP20 conforming to IEC 60529 and VDE 0106 |
| Ambient Air Temperature for Operation | -25…60 °C |
| Ambient Air Temperature for Storage | -40…85 °C conforming to IEC 60068-2-2 |
| Operating Altitude | ≤ 1500 m without derating in temperature, > 1500...3000 m with derating in temperature |
| Vibration Resistance | 1 gn 25...150 Hz conforming to IEC 60068-2-6, 2.5 gn 2...25 Hz conforming to IEC 60068-2-6 |
| Shock Resistance | 5 gn 11 ms conforming to IEC 60068-2-27 |
| Electromagnetic Compatibility | Resistance to electrostatic discharge, fast transients, surges, and electromagnetic fields |
The Schneider LT3SM00ED is a high-quality thermistor protection unit designed to offer reliable protection for motors and other sensitive equipment against overheating. This relay is part of the TeSys LT3 series and operates with a control circuit voltage of 24 to 48 V DC, making it versatile for various industrial applications.
Crafted with precision, the LT3SM00ED features a manual reset function, allowing for easy maintenance and troubleshooting. It comes with a dual voltage contact composition of 1 NO (Normally Open) + 1 NC (Normally Closed), ensuring flexible integration into existing systems. The unit is rated for an operational voltage of 250 V AC at 50/60 Hz, suitable for a wide range of electrical setups.
The thermistor protection unit boasts a compact design with dimensions of 100 mm in height and 22.5 mm in width, ensuring it can be accommodated within space-constrained environments. It also has a rated insulation voltage of 500 V AC for the output control relay, providing an additional layer of safety and durability.
Compliance with international standards such as IEC 60947-8 and IEC 60034-11, along with an IP20 degree of protection, ensures that the LT3SM00ED meets rigorous quality and safety benchmarks. The unit is also environmentally conscious, adhering to the REACh Regulation and EU RoHS Directive, confirming its commitment to sustainability.
The Schneider LT3SM00ED is an essential component for industries looking to safeguard their equipment from thermal risks, offering a blend of performance, reliability, and safety.
Commonly Asked Questions
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Frequently Asked Questions
What is the function of this thermistor protection unit?
The thermistor protection unit is designed to monitor the temperature of motors equipped with PTC thermistor sensors. It provides protection by tripping the relay and cutting off the power supply when overheating is detected, thus preventing potential damage to the motor.
Can this device be manually reset?
Yes, the LT3SM00ED features a manual reset function that allows users to reset the relay after a trip due to overheating, once the temperature has returned to a safe level.
What type of control circuit voltage is required for this unit?
The unit requires a control circuit voltage of 24 to 48 V DC to operate effectively.
What are the contact types and composition within this unit?
The unit contains 1 Normally Closed (NC) and 1 Normally Open (NO) contact, providing a dual voltage capability for versatile application.
What is the rated operational voltage for this thermistor protection unit?
The rated operational voltage for the unit is 250 V AC at 50/60 Hz.
What are the environmental operating conditions for this device?
The device can operate within an ambient air temperature range of -25 to 60 degrees Celsius and can be stored in temperatures ranging from -40 to 85 degrees Celsius. It is also designed to withstand certain levels of vibration and shock.
What is the IP degree of protection for this unit?
The unit has an IP20 degree of protection, conforming to IEC 60529 and VDE 0106 standards, which means it is protected against solid objects larger than 12.5 mm but not against water.
How many probes can be connected to this thermistor protection unit?
Up to 6 probes can be connected to the unit, allowing for multiple monitoring points within the motor system.
What is the significance of the RoHS compliance for this unit?
RoHS compliance means that the unit adheres to the Restriction of Hazardous Substances Directive, which restricts the use of specific hazardous materials found in electrical and electronic products.
How can I dispose of this unit responsibly at the end of its life?
The unit should be disposed of according to local regulations for electronic waste to ensure it does not end up in general rubbish bins and is recycled or disposed of in an environmentally friendly manner.
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