It is a device used to sense the temperature within the motor coils. There are usually three in a three phase motor, one for each coil. The output of the thermistor is used to hold an over temperature relay designed to be used with thermistors, in a closed position. The start circuit of the motor control is connected thriough this relay through N.C. contacts. If the motor goes into a over heat condition then the control relay drops out, the contacts of the relay open which in turn de-energizes the magnetic contactor and disconnects the motor from the supply voltage.
A: A potentiometer is a manual device to change the resistance A thermistor changes as a function of environment temperature
While some people use a much more exhaustive and precise testing procedure, a very simple test can uncover the most common problems with a thermistor: * measure the resistance of the thermistor at room temperature with an ohmmeter. If this resistance is 0 (short) or infinity (open), then something is connected incorrectly or the thermistor has been destroyed. (These are the most common problems). If that test looks good, then a followup test can uncover nearly all the remaining possible problems with a thermistor: * put icewater in a ziplock bag and press it against the thermistor. Then measure the resistance of the themistor at freezing. The two measured values of resistance are usually adequate to identify what kind of thermistor it is. If both values are practically the same, then it's not really a thermistor -- perhaps someone has accidentally substituted a resistor. If one or both values are not the expected values, perhaps someone has accidentally substituted a different kind of thermistor.
A Thermistor Is essentially a variable resistor. The resistance of the thermistor changes with temperature. They're often used to regulate heating elements - like those found in cookers.
The thermistor motor protection relays CM-MSE, CM-MSS and CM-MSN are used to control motors equipped with PTC temperature sensors. The PTC temperature sensors are incorporated in the motor windings to measure the motor heating. This enables direct control and evaluation of various operating conditions. Depending on the products also ATEX approvals for use in hazardous areas are available.
A thermistor an electrical resistor that resistance changes with temperature. There are two advantages of a thermistors one is it been more sensitive that the RTDÕs and thermocouples and two is has a quick response time.
A RV absorption refrigerator uses a thermistor as a thermostat. The thermistor is moved up or down to regulate the refrigerator temperature.
one is called a thermostat and the other is called a thermistor - Ross Henderson
A thermistor is thermoresistive.
No
A: A potentiometer is a manual device to change the resistance A thermistor changes as a function of environment temperature
While some people use a much more exhaustive and precise testing procedure, a very simple test can uncover the most common problems with a thermistor: * measure the resistance of the thermistor at room temperature with an ohmmeter. If this resistance is 0 (short) or infinity (open), then something is connected incorrectly or the thermistor has been destroyed. (These are the most common problems). If that test looks good, then a followup test can uncover nearly all the remaining possible problems with a thermistor: * put icewater in a ziplock bag and press it against the thermistor. Then measure the resistance of the themistor at freezing. The two measured values of resistance are usually adequate to identify what kind of thermistor it is. If both values are practically the same, then it's not really a thermistor -- perhaps someone has accidentally substituted a resistor. If one or both values are not the expected values, perhaps someone has accidentally substituted a different kind of thermistor.
A thermistor changes its resistance when the temperature changes. This means as the room temperature changes the current in the circuit containing the thermistor changes. This change in current is detected by the heater circuit, turning the heater on and off.
NTC thermistor
Output
metal oxide
to shag yer maaw
metal oxide