Lovato 31 Rgam 12 User | Manual High Quality

The Lovato 31 RGAM 12 is a microprocessor-based automatic transfer unit designed for managing generator operations, primarily focusing on automatic mains failure (AMF) functions. It monitors engine and alternator parameters and manages the changeover between mains and generator power. Key Specifications Power Supply: 12VDC (operating range: 6.2–16.5VDC).

| Specification | Value | |---------------|-------| | Rated insulation voltage (Ui) | 690 V | | Rated impulse withstand (Uimp) | 6 kV | | Thermal current (Ith) | 12 A | | Trip class | 10 | | Ambient operating temp | -25°C to +55°C | | Storage temp | -40°C to +70°C | | Protection degree | IP20 (terminals) / IP40 (front) | lovato 31 rgam 12 user manual

Generator Control: Single-phase control with RMS voltage and frequency readings. The Lovato 31 RGAM 12 is a microprocessor-based

| Symptom | Possible Cause | Solution | |---------|----------------|----------| | Motor trips immediately on start | Current setting too low; short circuit; locked rotor | Increase dial to match FLA; check motor windings | | Motor runs, then trips after several minutes | Overload; high ambient temp; incorrect setting | Measure actual motor current with clamp meter; reduce load; clean cooling vents | | Relay will not reset | Thermal element still hot; manual/auto setting wrong; mechanical stuck | Wait 5 minutes; check reset lever; press stop button then reset | | Contactor won’t stay closed | NC contact (95-96) open even without trip | Test continuity; replace relay if internal contact failed | | No trip even when motor draws >12 A | Dial set too high; relay defective; phase loss not detected | Verify setting; test with current injection tool | | Auxiliary contact not working | Loose wiring; contact burned | Check screws; measure voltage at 97-98 during trip | | Specification | Value | |---------------|-------| | Rated

4. Adjustable Time Delay (Start-up and Trip)

The manual outlines how to adjust the Delay (t).

Device Won't Power Up: Verify the fuse on the DC supply line and check that the battery voltage is at least 10.5V.

: Displays critical engine and alternator status, including three-phase mains control, voltage readings, battery voltage, and operating hours. Remote Management : Features a serial RS232 port