Overview
PTC relays continuously monitor motor winding temperatures, ensuring automatic shutdown during thermal overloads to prevent damage.
By preventing overheating and insulation breakdown, PTC relays significantly increase the operational lifespan of motors and machinery.
Easy to install and integrate, PTC relays reduce maintenance costs and downtime while offering a low-cost thermal protection solution.
From small motors to heavy-duty equipment, PTC relays are scalable and adaptable for diverse industrial environments.
A PTC Thermistor Relay is a protective device that works with thermistor sensors embedded in motor windings or equipment. It prevents overheating by monitoring resistance changes in the PTC thermistors and tripping when limits are exceeded.
Benefits
- PTC Thermistor Relay TR-100 – Compact motor protection relay with adjustable trip points.
- PTC Relay TR-200 – Multi-channel relay designed for larger machines and advanced safety needs.
- Accessories for PTC Relays – Expansion modules, sockets, and mounting kits for seamless installation.
- PTC thermistors sense rising temperatures.
- Resistance increases when preset limits are reached.
- The relay detects this change and disconnects the load or triggers an alarm.
- Electric motor protection
- Transformer temperature monitoring
- Generators and alternators
- Industrial heating systems
- Pumps, fans, and compressors
- Number of PTC sensors supported
Models
3 models available
PT100
Product Features
- Wide operating Supply Range 24V to 240V AC/DC.
- Two analog outputs of 0 to 10V DC.
- Sensor Fault detection (open/short) indication through LED’s as well as Analog outputs.
- LED Indications for power ON and relay ON status display.
- Adjustable wide temperature range from -50°C to 300°C through DIP switches.
- Auto/Manual reset mode selectable through DIP switch.
- Relay Normal/Inversion mode selectable through DIP switch.
- High load switching capacity of output up to 10A.