In the world of industrial automation and motor control, having a reliable and easy-to-monitor overload relay is non-negotiable. The Lovato 31 RGAM 12 is a thermal overload relay designed to protect AC motors from damage caused by overheating, excessive current draw, phase loss, or prolonged starting times.
If you have landed on this page searching for the Lovato 31 RGAM 12 user manual, you likely need practical, hands-on instructions for installation, wiring, setting the current range, or troubleshooting. While the official PDF from Lovato is indispensable, this article serves as a complete, searchable walkthrough — pulling together all critical data from the official documentation, real-world application notes, and common user questions.
Note: This article is an informational guide based on the official Lovato technical datasheet and user manual for the RGAM series. Always refer to the original printed manual for safety certifications and specific electrical code compliance. lovato 31 rgam 12 user manual
The Lovato RGAM series is a family of heavy‑duty rotary cam switches designed for industrial and commercial electrical applications. They are modular, compact, and rated up to 31A (depending on model). The switch you reference — RGAM 31 12 — is likely a 31A, 12‑terminal device used for changeover (transfer) or selector functions.
The Lovato 31 RGAM 12 meets global standards, making it suitable for export machinery and UL-listed panels. In the world of industrial automation and motor
| 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) |
Without the user manual, an error code on the Lovato 31 RGAM 12 is a mystery. Here are the most common codes from the manual: Note: This article is an informational guide based
| Error Code | Meaning | Likely Cause & Solution | | :--- | :--- | :--- | | Err 01 | Loss of phase L1 on Mains | Blown fuse, loose wire, or utility outage. Check terminal 1. | | Err 04 | Generator frequency too low | Generator engine speed too low. Check governor. | | Err 08 | Phase rotation error | L1, L2, L3 are not in correct sequence. Swap any two phases on the input side. | | Err 12 | Emergency stop active | The external E-stop button is pressed or the NC contact is open. Check terminals 22-24. | | Err 19 | Internal memory failure | Replace the controller. This is hardware failure. | | Err 24 | Generator failed to start | The controller sent a start signal (out 15-16), but after T2+T3, no voltage was sensed on L1’-L3’. Check fuel, battery, and starter motor. |
Procedure for Clearing Errors: The manual states that most errors reset automatically when the fault condition clears. For persistent "Err" codes, cycle the auxiliary power (disconnect terminals 1-3 for 10 seconds).
| Symptom | Possible cause | Action | |---------|----------------|--------| | Switch does not latch | Broken cam spring | Replace switch | | High contact resistance | Oxidized contacts | Operate switch several times under load (self-cleaning) | | Overheating | Loose terminal or overload | Tighten screw / reduce load | | Handle difficult to turn | Debris or misaligned shaft | Check handle coupling |