Lovato 31 Rgam 12 User Manual ((link))

This article is designed to serve as a complete resource for owners, electricians, and maintenance technicians seeking information about this specific automatic transfer switch.

Step 4: Selecting Manual or Automatic Reset

• Manual reset (recommended): Set the selector to “MAN” or “H” (Hand) — operator must press the reset button after a trip.
• Automatic reset: Set to “AUTO” or “A” — relay will reset automatically after cooling down. Use only where automatic restart does not pose a hazard.

Troubleshooting checklist

• No LEDs/power: check auxiliary supply and fuses.
• False trips on startup: increase start delay or widen thresholds.
• No trip on simulated fault: check wiring to sensing inputs and contact continuity; verify settings.
• Relay chatter: verify stable supply, check for loose terminals and contact ratings.

Installation (concise)

1. Mount on 35 mm DIN rail, ensure adequate clearance.
2. Connect three-phase supply to the designated input terminals (L1/L2/L3) and neutral if required per wiring diagram.
3. Wire relay output contacts to the control circuit (starter coil, alarm lamp, PLC input) following rated contact current.
4. Connect supply neutral/auxiliary supply if model requires separate auxiliary voltage.
5. Verify correct phase sequence and nominal voltage before commissioning.
6. Set thresholds and delays per application (motor protection, generator control, distribution).
7. Power up and perform functional test: simulate phase loss/reversal and confirm expected relay action.