Thermal damage is one of the most common causes of electric motor failure in industrial operations. Excessive heat can degrade insulation, distort components and result in costly downtime. VJ Pamensky (WEG Canada) supports distributors and resellers by providing expert guidance and product solutions for selecting the right thermal protection—whether it’s a thermostat, thermistor or RTD—based on motor size, environment and control system needs.
Electric motors are subject to a wide range of stresses. Overloads, inadequate ventilation or extreme ambient temperatures can push winding temperatures beyond safe operating levels. Without thermal protection, even short exposure to overheating can shorten motor lifespan and disrupt operations.
Thermostats
Function: Electromechanical switch that opens or closes at a preset temperature
Use Case: Ideal for basic over-temperature protection in smaller motors
Advantages: Low cost, easy to install
Limitations: Fixed trip point; no continuous monitoring
Thermistors
Function: Semiconductor devices (typically PTC) that sharply increase resistance at a specific temperature
Use Case: Suitable for motors needing accurate, trip-based protection integrated with control systems
Advantages: Compact, reliable near the setpoint
Limitations: Requires compatible relay; not suited for full-range temperature monitoring
RTDs (Resistance Temperature Detectors)
Function: Sensors (usually platinum PT100) that changes resistance proportionally with temperature
Use Case: Best for large, high-value motors requiring real-time temperature data
Advantages: High precision, wide measurement range, predictive maintenance friendly
Limitations: Higher cost, requires specialized monitoring equipment
When selecting the right thermal monitoring method, consider:
For more details on motor technologies, visit our electric motors solutions page.
Thermal protection systems should be compatible with your control architecture.
This integration helps prevent damage proactively, ensuring uptime and equipment longevity.
With decades of experience in electric motors and industrial automation, VJ Pamensky works closely with distributors and resellers to deliver thermal protection systems tailored to the motor and its operating environment. Whether the need is for a simple thermostat or a more sophisticated RTD-based solution, we help ensure compliance, protection and cost-efficiency.
Choosing the right thermal protection method—whether a thermostat, thermistor or RTD—can significantly extend motor life and reduce unplanned downtime. For distributors and resellers, partnering with VJ Pamensky (WEG Canada) ensures your customers receive accurate, application-specific solutions that improve reliability and reduce risk.
Have questions about selecting thermal protection for your motor application? Contact VJ Pamensky today to speak with one of our product specialists.
