TEE-FLARED 0679921 - Caterpillar

Illustration 1 g01758254
The R731 is an option that will provide three-phase sensing capability to the R438 Automatic Voltage Regulator (AVR). The output of the R731 module is connected across terminals "+" and "-" on the AVR after jumper "ST4" is removed. Note: In some cases, the stability of the voltage may be improved by keeping the "ST4" jumper in place. The R731 module has the following characteristics:
Selectable sensing voltage rangeN-110 V Terminals ... 90 to 140 VAC 5% (50 or 60 Hz)N-230 V Terminals ... 200 to 240 VAC 5% (50 or 60 Hz)N-400 V Terminals ... 340 to 480 VAC 5% (50 or 60 Hz)"P1" adjustment for voltage setting ... 5%
Terminals for a remote voltage adjust potentiometer (Requires removal of jumper "ST10"). Use 470Ω 3 Watt potentiometer for 5% adjustment, or 1kΩ 3Watt potentiometer for 10% adjustment.
Volt Ampere Reactive (VAR) control for droop in parallel operation adjustable with an internal "P2" potentiometer
Droop Current Transformer (CT) connection terminals, for use with 1 amp Secondary, 2.5 Volt Ampere (VA) minimum CTNote: Refer to Service Manual, KENR9009, "Wiring Diagram", Optional Three Phase Sensing Module wiring diagram and Optional Three Phase Sensing Module adjust section of Service Manual, KENR9009, for wiring diagrams.