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Spares / Alternators and Spares / Leroy Somer Alternators and Spares / Leroy Somer AVR
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Genuine Leroy Somer D350 digital automatic voltage regulator (AVR) for industrial alternators provides excitation current up to 5A with excellent reliability for permanent magnet (PMG) or AREP (auxiliary winding) excitation types.
Designed to fit LSA40 to LSA52.3 and TAL 40 to TAL 49 alternators with SHUNT, permanent magnet (PMG) or AREP (auxiliary winding) excitation types.
These are new and GENUINE LEROY SOMER AVRs direct from the factory.
Replaces the Analog R438 AVR.
Leroy Somer stopped production of the R438, superseding this to the new D350 Digital AVR.
These new Digital AVR types requires -
For customers wanting a direct Plug n Play replacement, we can offer the MAXIAVR R438 AVR.
D350 includes advanced protections such as over-excitation limitation and voltage sensing loss. It also includes speed detection capabilities, with over- and under-speed alarms. D350 also features voltage droop for Genset parallel operation, and it is equipped with a Load Acceptance Module (LAM) to handle load impact events.
Technology | Digital |
Excitation mode | SHUNT, AREP, PMG |
Rated excitation current | 5 A |
Regulation accuracy (+/- %) | 0.25 % |
Frequency range | 10 – 100 Hz |
Voltage setting range (+/- %) | 10 % |
kU/F limitation | 0.5 < k< 3 |
Loss of sensing voltage | ✓ |
Over-excitation limitation | ✓ |
Short circuit current limitation | ✓ |
Voltage droop | ✓ |
Parallel operation between alternators | ✓ |
Load Acceptance Module (LAM) | ✓ |
LSA 40
LSA 42.3
LSA 44.3
LSA 46.3
LSA 47.2
LSA 49.3
LSA 50.2
TAL 40
TAL 42
TAL 44
TAL 46
TAL 47
TAL 49
Configuration & setup
D350 can be configured using the Leroy-Somer EasyReg Advanced software.
NFLink Configuration Module for LEROY SOMER AVR