TM5-6115-593-34NAVFAC P-8-631-34TO-35C2-3-463-2Section IV. VOLTAGE REGULATOR4-17. GENERAL. The voltage regulator assemblyconsists of the voltage regulator mounted with theelectromagnetic interference (EMI) filter pack as acomplete unit. The voltage regulator assembly sensesgenerator voltage, compares the voltage with areference voltage, and supplies field (stator) current tothe generator to maintain voltage regulation. The EMIfilter pack, associated with the voltage regulator,provides EMI suppression. The voltage regulatorassembly is a separate unit mounted in the AC-DCcontrol box assembly.4-18. INSPECTION. Remove cover to facilitateinspection. Check voltage regulator wire connections onthe terminal board. Check grounding straps forlooseness. Check all components for loose mounting,poor connections, broken wires, or any other signs ofdamage.4-19. TEST. The voltage regulator is tested todetermine operational capability, as follows (see figures4-7 and 4-8).a.Operational Test.(1)Connect voltage regulator as shown intest setup, figure 4-7.(2)Disconnect leads from transformer T1primary, and connect to the 120 voltinput tap.(3)Mark position of potentiometer R4 onvoltage regulator.NOTER1 in test setup substitutes for themotor-operated potentiometer in theAC-DC control box assembly. Thisadjustment is provided to control thegenerator voltage. When adjusted toits maximum resistance position(CCW), minimum generator voltage isobtained. Maximum generator voltageis obtained with minimum resistance(cw).(4)Set potentiometer R4 on voltageregulator fully counterclockwise.(5)Adjust potentiometer R1 (in figure 4-7), for maximum resistance.(6)Slowly adjust R1 toward minimumresistance. Before reaching minimumresistance, light bulb should come onto near fullFigure 4-7. Voltage Regulator, Test Setup4-14
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