Universal Voltage Regulator VR648 for Generator GensetUniversal Voltage Regulator VR648 for Generator Genset Part NO.: VR648 Application: For IMC 3160, 3135, 1110. 1130 generators ( The VR648 AVR is normally connected with only 4 wires. It comes factory set with a short from (B to A) terminals and the dip switches set for 208 240 volts 60 Hertz use. 1 OFF 2 ON 3 ON In this configuration it works in almost all 12 wire generators sets from 190 to 277 volts and with exciter fields from 9 to 100 Ohms. )