LEROY SOMER R449 AVR FOR LEROY SOMER ALTERNATORS

LEROY SOMER AEM110RE010

General Description / Specifications

The R 449 voltage regulator is of a shunt type. It is designed to fit as standard on A50 to A 54 alternators. It can be supplied with power either by a power VT, or by the AREP field excitation system, or by a single-phase or 3-phase PMG. Using the R 726 external module, the regulator can control the power factor (2F) and can match the alternator voltage to the mains voltage (3F) prior to synchronization. The circuitry of the R 449 Automatic Voltage Regulator (AVR) provides closed loop control of the alternator output voltage by regulating the exciter field current. The R 449 can be powered by either AREP or the PMG field excitation systems and is fitted as standard on following alternators. The electronic apparatus mounted in a plastic casing are sealed with opaque elastomeric

The regulator includes:
> A main terminal strip (10 terminals) J1
> A secondary terminal block (5 terminals) J2
> A frequency selection terminal block (3 terminals) J3
> A quadrature droop potentiometer P1
> A voltage potentiometer P2
> A stability potentiometer P3
> An underspeed potentiometer P4
> A maximum excitation potentiometer P5
> A sensing selection jumper ST1
  (single/3-phase with an external module)
> A response time jumper ST2
> A frequency selection jumper ST3
> An external voltage setting jumper ST4
> A LAM (load adjustment module) jumper ST5

General Characteristics

> Voltage regulation +/- 0.5 % at steady state and constant speed.
> Two phase voltage sensing.
> Control by transistor means the regulation quality is independant of load applied.
> Integrated "LAM" system to cope with increased  loads applied to the engine
> Suitable for high levels of vibration and harsh environments.

The R 449 is compatible with other modules giving additional functions.(parallel operation, 3 phase sensing)

Applications

Alternators LSA 50.1, 51.2, 53, 54.
Compatible with the SHUNT, AREP+ PMI or PMG excitation system

The R449 is in Compliance with: IEC, VDE, NEMA, BS, CSA, UL508 CE low voltage