Electric motors and bearings
Monitoring and protection for electric motor and bearing applications.
Winding and bearing temperature under control
Sensors in the windings and bearings feed a thermal protection relay that warns, switches the cooling and trips the motor before heat causes damage.
Measurement points on the motor
Windings with PT100 or Cu10
The EPU supervises up to 16 temperature channels at once, for windings, bearings and housings.
Windings with PTC
The RT49 provides thermal protection (ANSI 49) with PTC sensors: 2 inputs and up to 4 sensors in series per input.
Bearings
PT100 sensors in the bearings, connected to the EPU or to the MoniTemp, which reads three sensors.
Current and integration
Split-core current transducer, TIIE transducer, CRS converter and RTU bring the measurements to the supervisory system.
What the relay signals
On the EPU, each stage has its own 10 A relay with a programmable delay:
Alarm
Warns that the temperature passed the first limit.
Cooling
Up to two relays switch the cooling.
Trip
Shuts the equipment down when the critical limit is reached.
Fault
Signals a fault condition.
How to size it
Count the points
Add up the winding and bearing sensors of each motor.
Choose by sensor type
PT100 or Cu10: EPU, up to 16 channels. PTC: RT49, with 2 inputs.
Define the integration
Use the EPU Modbus, DNP3 or MQTT, or gather the signals in an RTU.
Monitoring rotating machines
Electric motors convert electrical energy into mechanical energy. As rotating, dynamic machines, they require attention to maintenance and performance. Electron provides solutions that support monitoring and protection in these applications.
Need help choosing?
Talk to our team and find the right solution for your application.