Allen-Bradley 817S-PTC-230 Bulletin 817S thermistor monitoring relay, 230V AC supply voltage, monitors PTC thermistor sensors for motor overtemperature protection. Interrupts motor control circuit upon fault detection to prevent overheating damage. Used with motor starters and overload relays for comprehensive motor protection.

# Allen Bradley 817S-PTC-230 Thermistor Monitoring Relay The Allen Bradley 817S-PTC-230 Thermistor Monitoring Relay is an advanced electrical component designed to enhance motor protection by monitoring temperature levels in thermistor-equipped motors. This relay plays a critical role in safeguarding equipment from overheating, ensuring operational efficiency and longevity in various industrial applications. ## Key Features • **Thermistor Input Compatibility:** Designed to accept inputs from 2 to 3 thermistors, allowing for precise temperature monitoring essential for motor protection. • **Voltage Rating:** Operates effectively at 230V AC, making it suitable for a wide range of industrial environments. • **Adjustable Trip Settings:** Features adjustable trip points for customized temperature thresholds, ensuring flexibility in different applications. • **LED Status Indicators:** Equipped with LED indicators for easy monitoring of operational status, providing real-time feedback to operators. • **Compact Design:** The relay's compact form factor simplifies installation and integration into existing control panels without consuming excessive space. ## Applications • **Motor Protection:** Ideal for use in applications involving three-phase motors, especially in environments where overheating can lead to catastrophic failures. • **Industrial Automation:** Commonly utilized in manufacturing settings where precise temperature control and monitoring are critical to maintaining operational efficiency. • **Compatibility:** Works seamlessly with various Allen-Bradley control systems and thermistors, ensuring broad applicability across different setups. ## Benefits • **Enhanced Safety:** Provides critical protection against thermal overloads, reducing the risk of equipment damage and increasing safety in the workplace. • **Operational Efficiency:** By preventing overheating, the relay contributes to maintaining optimal motor performance and reducing downtime due to failures. • **Reliability:** Built with Allen-Bradley’s commitment to quality, this relay ensures dependable operation and long-term performance in demanding industrial conditions. --- *Product information compiled with AI assistance for reference purposes.*