LT3SM00ED

Telemecanique LT3SM00ED available at EU Automation. Get in touch today for a quick price.

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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.
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

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.

  • Monitoring and protection of motors in industrial machinery
  • Overheat detection for bearings in heavy-duty applications
  • Thermal protection for transformers in power distribution systems
  • Safety monitoring in HVAC systems to prevent overheating
  • Protection of wind turbine generators from temperature-related damages
  • Integration into control systems for temperature-sensitive processes
  • Use in automated manufacturing lines to safeguard equipment
  • Monitoring of temperature in pumps to prevent failures due to overheating
  • Ensuring the longevity of compressors by detecting abnormal temperatures
  • Application in material handling systems to prevent motor burnout

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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