The Thermistor Motor Protection Relay DG 3802 protects motors und machines against over-temperature caused by heavy starting duties, braking, under-voltage, over-voltage and high switching frequencies. Additional applications include monitoring the temperature of transformers, pumps, centrifuges, motor bearings, gearboxes, oil and coolants and the avoidance of thermal overload in the event of impeded cooling and high ambient temperatures. The temperature is monitored directly at the winding using thermistors or bimetal switches. Up to 6 sensors can be connected in series. When a certain resistance is reached, the output relays switch off. Restarting takes place after cooling down via auto-reset. The motor protection relay works with open circuit operation and also detects broken wire in the sensor circuit. The monitoring state is indicated by a yellow LED. The relay changeover-contact switches high power loads up to 6 A. The Protective Separation and the 24 V DC power supply makes the DG 3802 universally applicable for all measurement and industrial applications, as well as for building automation. • Reliable overtemperature protection Up to 6 thermistors or bimetal switches, wire break detection in the sensor input • Fault message in closed-circuit operation 2 output relays not activated in the event of fault, restart via auto-reset • Status indication by LED Easy monitoring and switching point adjustment • Protective 4-Port Separation acc. to EN 61010 Protects service personnel and downstream devices against impermissibly high voltage • High reliability and noise immunity No microprocessor, no integrated software • Extremely slim design 12.5 mm slim housing for a simple and space saving DIN rail mounting • 5 Years Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant DRAGO Signal Converter - Isolation Amplifiers - www.drago-automation.de

Monitoring sensors Monitoring function Number of sensors Sensor load Threshold value Release value Output Contact type Switching capability AC max. Switching capability DC max. Recommended minimum load Status indication Response time General Data Switch error Test voltage Working voltage (Basic Insulation)2' Protection against electrical shock2' Power supply Ambient temperature EMC3' Thermistor/ PTC Resistor Sensor and Thermical Bimetal Switches (breakers, e.g. Klixon) Over-temperature protection in open circuit operation, restart via auto-reset 2 isolated changeover relays (SPDT), synchronous...