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This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
what is the difference between PTC & PT100 their function and connecting way ?
- PT100 is an RTD (Resistance Temperature Probe) made of Platinum metal which has a resistance value of 100 ohms at zero degrees celsius.
- PTC (Positive Temperature Coefficient) and NTC (Negative Temperature Coefficient) are both types of Thermistor. NTC have resistance that decreases with increasing temperature. PTC exhibit increased in resistance with increasing temperature.
Thermistor(PTC) have a very high sensitivity, and therefore are very responsive to changes in temperature with faster response time than RTDs(PT100), but smaller temperature range than RTDs. In short both RTDs and Thermistor are electrical thermally sensitive resistors, they are which changes with temperature. Both are useful for specific design application.
As mentioned in our previous reply, we do not have any Thermistor relay to connect 6 PTC probes and 2 PT100 Probes. Hence we regret for unable to suggest any reference for this requirement.
The LT3S range of thermal protection units with PTC thermistor probes. You can connect the probes are PTC technology, not PT100 - the LT3S range only works with PTC probes. The motor has 3 probes wired in series in the motor providing a total of 750 ohms at 20°C.
You can connect 3 probes in series and connect the start and end terminals to LT3SA00MW relay. So for connecting 6 PTC probes, you may have to use 2 numbers LT3SA00MW reference. PT100 can not be connected with LT3.
- PTC (Positive Temperature Coefficient) and NTC (Negative Temperature Coefficient) are both types of Thermistor. NTC have resistance that decreases with increasing temperature. PTC exhibit increased in resistance with increasing temperature.
Thermistor(PTC) have a very high sensitivity, and therefore are very responsive to changes in temperature with faster response time than RTDs(PT100), but smaller temperature range than RTDs. In short both RTDs and Thermistor are electrical thermally sensitive resistors, they are which changes with temperature. Both are useful for specific design application.
As mentioned in our previous reply, we do not have any Thermistor relay to connect 6 PTC probes and 2 PT100 Probes. Hence we regret for unable to suggest any reference for this requirement.
The LT3S range of thermal protection units with PTC thermistor probes. You can connect the probes are PTC technology, not PT100 - the LT3S range only works with PTC probes. The motor has 3 probes wired in series in the motor providing a total of 750 ohms at 20°C.
You can connect 3 probes in series and connect the start and end terminals to LT3SA00MW relay. So for connecting 6 PTC probes, you may have to use 2 numbers LT3SA00MW reference. PT100 can not be connected with LT3.
Released for:Schneider Electric Egypt and North East Africa
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