INSTRUCTION MANUAL Publication: FOR …

1 BASLER ELECTRIC,BOX 269,HIGHLAND, IL 62249 PHONE 618/654-2341 FAX 618/654-2351 INTRODUCTIONThe AVC63-4A Voltage regulators are designedfor use on 50/60 Hz brushless generators. Theregulator includes frequency compensation,overexcitation shutdown, a solid-state build-upcircuit, and EMI SPECIFICATIONSDc Output Power:4 Adc at 63 Vdc (252W) maximum continuous,7 Adc at 100 Vdc (700W) forcing one minute(at 120 Vac input).9 Adc at 134 Vdc (1206W) forcing for 10seconds (at 153 Vac input).Exciter Field Dc Resistance:15 ohms, minimum; 100 ohms Power Input:Operating range: 95 Vac to 139 Vac, 10%,Single phase, 50/60 Hz, Burden: 450 Input:95-139 Vac, 10%, or 190-277 Vac, 10%,single phase, 50/60 Accuracy:Better than no load to full Time:Less than cycles for 5% change in Suppression:Internal electromagnetic interference filter (EMIfilter).

2 Overexcitation Shutdown:Field voltage shuts down after time delay ifexciter field voltage exceeds 95 Vdc, 5% (SeeOverexcitation Shutdown for inverse time delaycurve and description).Voltage Build-up:Internal provisions for automatic voltage build-upfrom generator residual voltages as low as Dissipation:15 Watts :1/4 inch "Fast-On" SPECIFICATIONSO perating Temperature:-25 C (-13 F) to +60 C (+140 F).Storage Temperature:-40 C (-40 F) to +85 C (+185 F).Vibration:Withstands Gs at 5 to 26 Hz; " doubleamplitude at 27 to 52 Hz; and 5 Gs at 53 to :Withstands up to 20 Gs in each of three mutuallyperpendicular :10 oz. ( kg) the AVC63-4A has an internal fuse, it isrecommended that fuses with high interruptioncapability be installed per the interconnectiondiagram to protect wiring from faults before theregulator.

3 A spare fuse is included with theAVC63-4A (internal fuse). It is mounted"piggyback" to the orginal fuse. Refer to theOutline must be installed per theinterconnection diagrams to avoid inter-rupting the field Outline Diagram (Top View)AVC63-4A Outline Diagram (Side View)V/HZ "CORNER FREQUENCY" SELECTIONAND ADJUSTMENTFor 60 Hz systems, the regulator is preset at thefactory for a 55 Hz "corner frequency". For 50Hz systems, a 45 Hz "corner frequency" isachieved by connecting a jumper acrossterminals Hz1 and corner frequency can be adjusted by the UFADJ rheostat on the AVR. Clockwise rotationresults in raising the corner frequency (shiftingthe curve to the right).

4 To set the UF rheostat:1. Adjust the UF Rheostat fully Start the generator and set at rated Adjust the generator frequency to the desiredkneepoint Slowly adjust the UF ADJ rheostat clockwise(CW) until the generator voltage just begins Compensation CurvesOVEREXCITATION SHUTDOWNO verexcitation shutdown is included thatremoves the output power if the exciter fieldvoltage exceeds 95 Vdc. If exciter field voltageexceeds 95 Vdc 5%, the regulator automaticallyremoves field current, after a time delay. Thetime delay is inversely proportional to themagnitude of the detected overvoltage 134 Vdc, the field voltage is removed afterapproximately 10 seconds.

5 Refer to thefollowing Time Delay Characteristic CurvesAfter output power is removed, the regulator canbe reset by decreasing the input voltage to lessthan 6 Vac for a minimum of 2 seconds; this maybe accomplished by stopping the prime mover orby interrupting the regulator input with a ADJUST RHEOSTAT (STAB)An internal screwdriver adjustable potentiometerprovides adjustment to the response rate of thegenerator output voltage to a change in rotation of this adjustment provides anincrease in the response time and thereforedecreases the amount of voltage overshoot(increased stability). Counter-clockwise rotationof this adjustment provides a decrease in the re-sponse time (faster response time) and thereforeincreases the amount of voltage overshoot(decreased stability).

6 OPERATIONThe following system operation proceduresprovide instructions for adjusting the AVC63-4 Avoltage regulator. Symptoms resulting from aCONFIDENTIAL INFORMATIONOF BASLER ELECTRIC COMPANY, HIGHLAND, IS LOANED FOR CONFIDENTIAL USE, SUBJECTTO RETURN ON REQUEST, AND WITH THEMUTUAL UNDERSTANDING THAT IT WILL NOT BEUSED IN ANY MANNER DETRIMENTAL TO THEINTEREST OF BASLER ELECTRIC :9 2858 00 990 1997, Basler Electric Co., Highland, IL 62249 First Printing June 1994 Revision: D September 1997 ECA: 16300 INSTRUCTION MANUALFORVOLTAGE REGULATORM odel: AVC63-4 APart Number: 9 2858 00 100faulty regulator and certain generator systemproblems are included, together with the following steps before proceedingwith the system and high potential test equipmentmust not be used.

7 Incorrect use of suchequipment could damage thesemiconductors contained in the SET-UP1. Verify that the voltage regulator specificationsconform with the generator Ensure that the regulator wires are as follows:a) If the remote voltage adjust rheostat is notto be connected, ensure terminals 6 and 7are shorted with a ) If a 55 Hz "corner frequency" for 60 Hzsystems is desired, ensure that the Hz1and Hz2 terminals are open. If a 45 Hz"corner frequency" for 50 Hz systems isdesired, ensure that the Hz1 and Hz2terminals are shorted together with ) For 120 V nominal sensing, ensure thatterminals V1 and V2 are not 240 V sensing, ensure that terminalsV1 and V2 are connnected Ensure the voltage regulator is correctlyconnected to the generator Install the fuses as described in Set the regulator VAR and external VAR (ifused) as follows:SwitchInitial SettingRegulator VARF ully CCWR emote VARC enteredSYSTEM START-UP1.

8 Perform preliminary set-up as described inthe above voltage readings are to be taken withan average reading Start prime mover and bring up to : Voltage should build up. If not,perform Field Slowly adjust the regulator VAR CW until thegenerator output voltage reaches the nominalvalue. If used, adjust the remote VAR to setthe generator voltage to the exact : Voltage should build up to ratedvalue. If voltage does not build up to ratedvalue, check generator for short or Check regulator under normal operating andloading : Voltage regulation should be betterthan no-load to full-load. If regulation isnot within this range, perform the following steps:1.

9 Voltage reduction under load may be due tospeed change from no load to full load,causing the frequency compensation (V/Hz)circuit to reduce voltage at lower frequencies. voltage TEST1. Connect the test setup as shown in thefollowing figure, Operational Test. Do notapply power. Ensure that the light bulb israted for 120 V and is less than 100 Adjust the regulator VAR and/or remote VAR,and the STABILITY Adjust to Apply 120 V, 50/60 Hz power to the light bulb should Slowly adjust the regulator VAR control the regulation point, the light bulb shouldextinquish. Small adjustments above and belowthis level should cause the light bulb to go offand on.

10 Note that the light bulb goes on and Rotate the STABILITY ADJ fully CW. Nowadjust the regulator VAR above and below theregulation point. The light bulb should still gooff and on, but the transition from off to on(and vice versa) should be much slower thanin the paragraph following notes ( ) apply to the intercon-nection diagrams:1. If external pot is not used, short terminals 6and Short terminals Hz1 and Hz2 and leave openfor 60 Item not supplied by Basler For 120 V Nominal sensing, make noconnection to terminals V1 and 240 V Nominal sensing, short terminalsV1 and V2 Select fuses with high interrupting SWITCH(IF USED)120V7 ANCBACW2W10 KEXTERNALVOLT.