Installation and maintenance guide for the Leroy‑Somer D350 digital voltage regulator, covering wiring, settings, safety and troubleshooting.
This manual provides complete instructions for installing, configuring, and maintaining the D350 digital voltage regulator used with alternators. It includes safety measures, wiring diagrams, mounting details, and step‑by‑step procedures for both analogue and digital operation modes.
The document also describes the NFLink™ configuration module, software setup with EasyReg Advanced, and a comprehensive troubleshooting appendix that lists common faults and corrective actions.
| Regulation accuracy | +/-0.25% (harmonic distortion <5%) |
|---|---|
| Voltage adjustment range | 0 to 150% of rated voltage |
| Power supply (AC) | 50‑277 V ac, max 3000 VA |
| Dimensions (H×W×L) | 52.9 mm × 125 mm × 140 mm |
| Weight | 0.45 kg |
| Frequency range | 10‑100 Hz |
| Field current rating | 0‑5 A continuous, 10 A short‑circuit (10 s) |
Read the entire installation and maintenance manual and ensure that all operations are performed by a qualified technician.
The NFLink™ module is placed on the plastic enclosure using two dedicated positioning holes and removed after configuration.
The regulator supports a continuous field current up to 5 A and a short‑circuit current up to 10 A for a maximum of 10 seconds.
Reduce the soft recovery parameter (%/s) in the configuration to speed up the regulation loop.