Profile: Silicon Power Systems is a manufacturer of alternator voltage regulator & industrial electronic products. We are an ISO 9001:2000 certified company. AF 460 alternator voltage regulator features output excitation voltage 100VDC/4 ADC, sensing & power input 180-200V from tapping winding, over excitation voltage protection, under frequency protection, remote pot facility, can be used for both 3 phase & single phase alternator, 50 / 60 Hz jumper selectable for under frequency protection and direct replacement of Stamford SX460AVR. SPS 3810 alternator voltage regulators are designed for slip ring type alternators. They can be used for both 3 phase & 1 phase alternators.