Automatic Voltage Regulator AVR VR6 K65-12B K125-10B for Caterpillar Generator K65-12B KATO AVR Input: 180-280 Vac, 50/60 Hz, 1 OR 3 phase PMG EXCITED 63-105 Vac 100/240 Hz 3 phase Sensing input: 180-280 Vac, 50/60 Hz 1 OR 3 phase CT input: 1 or 5 Aac 50/60 Hz ACC input: +/- 3 Vdc. Output: 65 Vdc @ 12 Adc SpecificationK65-12BK125-10B Output power (with a 240 Vac Input):12 Adc 65 Vdc maximum continuous. 25 Adc 125 Vdc forcing for 10 seconds.10 Adc 125 Vdc maximum continuous. 20 Adc 250 Vdc forcing for 10 seconds. AC input power:100 to 280 Vac, single-phase 50 to 400 Hz, or 63 to 105 Vac; three phase, 50 to 400 Hz, 1092 VA maximum continuous burden180 to 280 Vac, single phase or three-phase, 50 to 400 Hz, 1750 VA maximum continuous burden AC sensing voltage:90 to 140 Vac, 50/60 Hz; single- or three-phase.90 to 140 Vac, 50/60 Hz; single- or three-phase. External voltage adjust rheostat:10k ohm, 2 W, potentiometer10k ohm, 2 W, potentiometer .Regulation accuracy:±0.5% Average responding±0.5% Average responding Voltage drift:±1% voltage variation for a 40° C (104° F) change.±1% voltage variation for a 40° C (104° F) change. Response time:<4 milliseconds<4 milliseconds Frequency compensation:1 or 2 V/Hz jumper selectable with knee adjustable from 45 Hz to 65 Hz.1 or 2 V/Hz jumper selectable with knee adjustable from 45 Hz to 65 Hz. EMI suppression:Internal filterInternal filter Voltage Build-Up:Internal provisions for automatic voltage build-up from generator residual voltages as low as six Vac.Internal provisions forautomatic voltage build-up from generator residual voltages as low as six Vac. Over excitation shutdown:Over excitation protection starts timing at 90 Vdc ±5% and takes the output to zero in greater than 30 seconds. The output can be 125 Vdc for greater than 10 seconds.Over excitation protection starts timing at 180 Vdc ±5% and takes the output to zero in greater than 30 seconds.