If any abnormality is suspected, non-contact thermometers can be used to measure the temperature. Practical tips for installation and using of thermistor motor protection eep relay definition working principle selection over temperature electrical engineering centre ptc thermistors electric from mod tronic tdk how to use as cur passive components blog the basics built in beginners products ntc. In smaller motors, no temperature monitoring provision is given. Readings from these instruments can be periodically taken and monitored. In some motors, temperature gauges or industrial thermometers which indicate temperature are provided. Fan Motor Winding Connection (CRS) And Check Motor Winding Temperature Sensor in urdu hindi fan motor check over load and connection winding connect overloa. High bearing Temperature can be caused by improper alignment with the load, inadequate lubrication and even high ambient temperature. Thermistors may require a controller, but thermocouples and resistance temperature detectors (RTDs) can be easily read with common, handheld meters and reference tables. These sensors are also connected to the temperature monitoring equipment. If the motor is equipped with temperature detectors that are capable of providing readings, use them. High ambient temperature can also be a reason for high winding temperature.Ībnormal winding temperature can cause damage to the insulation eventually leading to failure.īearing Temperature in motors is measured by temperature sensors which are machined in the bearing housing such that the tip of the sensor comes in contact with the bearing. Poor ventilation can be due to a filter which has choked.
The sensors (usually RTDs) can be connected to any external monitoring device.Ībnormal winding temperature in a motor winding can indicate overloading or poor ventilation. These temperature sensors are not always accessible from outside. Winding temperature is measured by temperature sensors which are attached to the windings in the stator slots at the time of manufacture. The two temperatures which are monitored at the bearing temperatures and the winding temperature. Temperature can indicate any abnormality before any serious damage occurs.
In latching mode, the unit must be reset after a trip by means of the front panel Reset button or an external switch. SPW Industrial warrants this product to be free of defects in workmanship and material under normal use and conditions for period of one year from the date. Switches on the front panel select sensor type and latching (memory) on/off.Relay contacts can be used to disconnect the supply to the motor if it overheats. This is why a majority of motors and gearmotors especially those used in motion control applications have thermistors or silicon resistive sensors (also referred to as KTY sensors) integrated into the motor windings.
This unit monitors the temperature of a motor using the PTC sensor (positive temperature coeffi cient resistor) or thermostat (TK) switch built in to the motor winding.