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Model No.︰ R448
Brand Name︰ LEROY SOMER
Country of Origin︰ China
Minimum Order︰ 2 pc

R448 AVR is used on LEROY SOMER LSA 46.2, LSA 47.2, LSA49.1 alternators with AREP or PMG excitation.

R448 Characteristics
- Shunt power supply: max 150V - 50/60 Hz
- Rated overload current: 10A - 10s
- Electronic protection: (in the event of
overload, short-circuit, loss of voltage sensing)
this acts to restore the value of the excitation
current to 1A after 10 s. The alternator must be
stopped (or the power switched off) in order to
reset the protection.
- Fuse: F1 on X1, X2.10A; slow - 250V
- Voltage sensing: 5 VA isolated via transformer
@ 0-110 V terminals = 95 to 140 V
@ 0-220 V terminals = 170 to 260 V
@ 0-380 V terminals = 340 to 520 V
for other voltages, a transformer should be used.
- Voltage regulation ± 0.5%
- Normal or rapid response time via jumper ST2 (see below)
- Voltage adjustment via potentiometer P2 or
apply a DC voltage of ± 1 V on the terminals of
the external potentiometer
- Current sensing: (parallel operation): input
S1, S2 intended for 1 C. T. ≥ 2.5VA cl1, secondary 1A (optional)
- Quadrature droop adjustment via potentiometer P1
- Max. excitation current adjustment via P5 4.5 to 10A (see below)
- 50/60 Hz selection via ST3 jumper
-ST11: Knee-point at 65 Hz for Tractelec application and variable speed.