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Spares / Alternators and Spares / Leroy Somer Alternators and Spares / Leroy Somer AVR
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Genuine Leroy Somer D550 digital automatic voltage regulator (AVR) provides excitation current up to 7A with excellent reliability and precision for SHUNT, permanent magnet (PMG) or AREP (auxiliary winding) excitation types.
Designed to fit LSA40 to LSA52.3 alternators with SHUNT, permanent magnet (PMG) or AREP (auxiliary winding) excitation types.
For additional information on the Leroy Somer D550 AVR please call us!
The new D550 replaces the D510 and D510C
D550 includes advanced protections such as over-excitation limitation and voltage sensing loss, and also features voltage droop for Genset parallel operation. The D550 is also equipped with a Load Acceptance Module (LAM) to handle load impact events.
The D550 AVR is also optimized for grid paralleling operation, and complies with the latest grid code regulations, including the latest German grid code regulations VDE 4110 and VDE 4105. In this context, the D550 also includes active & reactive reverse power alarms.
Technology | Digital |
Excitation mode | SHUNT, AREP, PMG |
Rated excitation current | 7 A |
Regulation accuracy (+/- %) | 0.25 % |
Frequency range | 10 – 400 Hz |
Voltage setting range (+/- %) | 30 % |
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) | ✓ |
D550 can be configured using the Leroy-Somer EasyReg Advanced software.