AVR R250 Automatic Voltage Regulator for Generator Alternator

The R250 is an analogic Automatic Voltage Regulator with transistor.


Applications Alternators LSA 42.2, 43.2, 44.2, 46.2, 47.2. Compatible with the SHUNT excitation system. The R250 is in Compliance with: IEC, VDE, NEMA, BS, CSA, UL508 CE low voltage.

Main characteristics

Voltage regulation +/- 0.5% at steady state and constant speed.

Phase to neutral voltage sensing.

The regulation quality is independant of load applied.

Optimum management of impact loads using micro-processor technology.

Suitable for high levels of vibration and harsh environments.

Supply range/voltage detection 85 to 139 V(50/60Hz).

Rapid response time(500 ms) for a transient voltage variation amplitude of ± 20%.

Voltage setting P1.

Stability setting P2.

Supply protected with an 8 A fuse, slow action (supports10 A for 10 s).

U/F Fonction and LAM

Operating at 50 Hz: (U/F gradient)

Operating at 60 Hz: (U/F gradient)

Specific operating

R250 A.V.R. Option