RT 1 = RT 2 e [β (1/T1 – 1/T2)] Where RT 1 = resistance of the thermistor at temperature T 1. RT 2 = resistance of the thermistor at temperature T 2. β = is a constant, its value depends upon the material used in the construction of the thermistor, typically its value ranges from 3500 to 4500. Voltage Current Characteristics: The voltage

Smart relays have simple functions such as time relay, counter, and PTC. Smart relays are designed to simplify the electrical wiring of intelligent solutions. A smart relay is simple to implement. Its flexibility and its high performance allow users to save time and money. The smart relay has a display used to show ladder diagrams.. "/>

Thermistor Working Principle: Thermistor Working Principle - The electrical resistance of most materials changes with temperature. By selecting materials that are very temperature sensitive, devices that are useful in temperature control circuits and for temperature measurements can be made.

PTC sensors integrated in the motor windings directly measure the motor heat. This direct temperature measurement enables the thermistor motor protection relays to evaluate various motor conditions such as overheating, overload and insufficient cooling. ATEX approval is also available for products used in hazardous areas.

High operating safety. The thresholds are determined by the Motor PTC. Beyond the specified temperature the output stops the motor/s.

Thermistor Monitoring Relay Our Bulletin 817S Thermistor Monitoring Relays p rotects equipment from over-temperature conditions and offers supplementary motor protective functions that you can easily add and apply to your motor control circuits. Contact a Distributor Find A Sales Office Get Support Find a Product Partner 817S Thermistor Monitoring

PTC relay working principle. ptc means temperature coefficient of the positive thermistor, which means that there is a relay with working temperature ratio. Basically, a ptc thermistor is a resistance whose resistance increases with increasing temperature. How does a ptc relay work?. Probe, RTD, Pt100 , Class B, 150 mm, 3 mm, Stainless Steel.

NTC thermistors' resistance decreases as their temperature increases, while PTC thermistors' resistance increases as their temperature increases. Only NTC 

A thermal relay works depending upon the above mentioned property of metals. The basic working principle of thermal relay is that, 

A Thermistor is a Thermal Detection Resistor of Temperature Transducers that presents a foreseeable and precise variation in resistance based on temperature changes. Its distinctive composition is the main aspect of how much its resistance will modify. Generally, thermistors are part of a greater group, including passive components.

The direct measuring principle is carried out by a combination of the thermistor motor protection relay and 3 PTC sensors which.