R438

AVR LEROY SOMER

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Hãng sản xuất: LEROY SOMER

For both AREP & PMG excitation systems, the alternator voltage regulator is the R438. With AREPexcitation, the R438 electronic AVR is powered by two auxiliary windings which are independent of the voltage match circuit.

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DOWNLOAD AVR LEROY SOMER R438 MANUAL

- Storage : -55°C ; +85°C

- Operation : -40°C ; +70°C

- Standard power supply: AREP or PMG.

- Rated overload current: 8 A - 10 s

- Electronic protection (overload, short-cir-cuit on opening of voltage sensing circuit): excitation overload current for 10 seconds then return to approximately 1A. The alter-nator must be stopped (or the power switched off) in order to reset the protection.

- Fuse : F1 on X1, X2. 8A ; slow - 250V

- Voltage sensing : 5 VA isolated via trans-former ;

• 0-110 V terminals = 95 to 140 V,

• 0-220 V terminals = 170 to 260 V,

• 0-380 V terminals = 340 to 520 V.

- Voltage regulation ± 1%.

- Normal or rapid response time via ST2 jumper (see below).

- Voltage adjustment via potentiometer P2. other voltages via adapter transformer

- Current sensing (parallel operation): C.T. 2.5 VA cl1, secondary 1 A (optional).

- Quadrature droop adjustment via potentio-meter P1.

- Max. excitation current adjustment via P5 (see below).