EA63-4 - Kutai Electronics
Contents
1. Wire Figure 4 A EXCITATION ON OFF SWTCH IF USED ENNYD T m S EXTERNAL VOLT ADJ RHEOSTAT A EXCITATION ON OFF SWITCH IF USED Interconnection Diagram 127 220 V Nominal 1 phase 3 Wire Figure 6 The following notes 4 apply to the interconnection diagrams iP 2 If external pot is not used short terminals 6 and 7 For 50Hz short terminals HZ1 and HZ2 and leave open for 60Hz Item not supplied by KUTA ELECTRONICS For 120V Nominal sensing make no connection to terminals V1 and V2 For 240V Nominal sensing short terminals V1 and V2 together Select fuses with high interrupting capacity 3 EXCITATION ON OFF SWTCH IF USED 4 2D EXTERNAL VOLT ADuJ RHEOSTAT Al 10K 1W A Interconnection Diagram 277 480 V Nominal 3 phase 4 Wire Figure 5 EXTERNAL VOLT ADuJ RHEOSTAT 10K 1W NOTE ENCLOSE FOR SAFETY IF GLASE TYPE FUSE IS USED Operational Test Figure 7 EA63 42. BAGS 4 Generator Automatic Voltage Regulator Operation Manual Self Excited Automatic Voltage Regulator Compatible with Basler AVC63 4A Use for reference purpose only and not a genuine Basler product HURRA LARS KUTAI ELECTRONICS INDUSTRY CO LTD Headquarters No 3 Lane 201 Chien Fu ST Chyan Jenn Dist Kaohsiung TAIWAN Tel 886 7 8121771 Fax 886 7 8121775 URL http www kutai com tw 1 SPECIFICATION Sensing Input Thermal Drift Voltage 1 phase 95 139 VAC 10 or 0 05 per C change in AVR ambient 190 277 VAC 10 External Volts Adjustment Frequency 50 60 Hz selectable 15 with 10K ohm 1 watt trimmer Power Input Voltage 95 189 VAC 10 1 phase2 wire Frequency 50 60 Hz EMI Suppression Internal electromagnetic interference filtering Unit Power Dissipation CuIpUE Max 15 watt Voltage Max 63 VDC Current Continuous 4A Under Frequency Protection Factory Setting Intermittent 7A for 60 sec Knee point adjustable range 45 55 Hz JA TOMIO See Over Excitation Shutdown Resance MUNNS OO N AR OON Field volts shut down after a time delay Voltage Regulation If exciter field volts exceed 95 VDC 5 lt 1 with 4 engine governing Dimensions Voltage Build up 140mm L 125mm W 48mm H Residual voltage at AVR terminal gt 5 VAC Weight 280g 2 V Hz CORNER FREQUENCY SELECTION AND ADJUSTMENT For 60 Hz systems the regulator is preset at the factory for a 55 Hz
3. corner frequency For 50 Hz systems a 45 Hz corner frequency is achieved by connecting a jumper across terminals Hz1 and Hz2 60 The corner frequency can be adjusted by the U F ADJ rheostat on the AVR Clockwise rotation results in raising the corner frequency shitting the curve to the right To set the UF rheostat 1 Adjuat the UF Rheostat fully CCW 2 Start the generator and set at rated voltage 20 ATOR OUTPUT OF NOMINAL NE GE O o FREQUENCY Hz 3 Adjust the generator frequency to the desired kneepoint frequency Frequency Compensation Curves 4 Slowly adjust the U F ADJ rheostat clockwise CW until the Figure 1 generator voltage just begins to decrease A OVEREXCITATION SHUTDOWN 2 Overexcitation shutdown is included that removes the output power if ao the exciter field voltage exceeds 95 Vdc If exciter field voltage exceeds a 2 95 Vdc 5 the regulator automatically removes field current after a S a time delay The time delay is inversely proportional to the magnitude of aie the detected overvoltage condition At 134 Vdc the field voltage is 3685 090 95 400 108110 115 490 108 150 155 140 145 150 156 160 Les 190 removed after approximately 10 seconds Refer to
4. egulator normal operating and loading conditions RESULT Voltage regulation should be better than 1 0 no load to full load If regulation is not within this range perform the following steps e Voltage reduction under load may be due to speed change from no load to full load causing the frequency compensation U F circuit to reduce voltage at lower frequencies e Replace voltage regulator 2 5 OPERATIONAL TEST 1 Connect the test setup as shown in the following figure Operational Test Do not apply power Ensure that the light bulb is rated for 120V and is less that 100W Complete the following steps before proceeding with the system start up Adjust the regulator VAR and or remote VAR and the STABILITY Adjust to maximum CCW Apply 120V 50 60 Hz power to the regulator The light bulb should illuminate Slowly adjust the regulator VAR control CW At the regulation point the light bulb should extinquish Small adjustments above and below this level should cause the light bulb goes on and off rapidly Rotate the STABILITY ADJ fully CW Now adjust the regulator VAR above and below the regulation point The light bulb should still to off and on but the transition from off to on and vice versa should be much slower than in the paragraph above aA nA ZD EXTERNAL AY VOLT ADJ RHEOSTAT 10K 1W A Interconnection Diagram 127 220 V Nominal 3 phase 4
5. equirements 2 Ensure that the regulator wires are as follows e If the remote voltage adjust rheostat is not to be connected ensure terminals 6 and 7 are shorted with a jumper e f a55 Hz corner frequency for 60 Hz systems is desired ensure that the HZ1 and HZ2 terminals are open If a 45 Hz corner frequency for 50 Hz systems is terminals are shorted together with a jumper e For 120V nominal sensing ensure that terminals V1 and V2 are not connected For 240V sensing ensure that terminals V1 and V2 are connected together 3 Ensure the voltage regulator connected to the generator system is correctly 4 Install the fuses as described in Fuses 5 Set the regulator VAR and external VAR if used as follows EA63 4 SWITCH INITIAL SETTING Regulator VAR Fully COW Remote VAR 2 4 SYSTEM STAR UP 1 Perform preliminary set up as described in the above paragraphs NOTE All voltage readings are to be taken with an average reading voltmeter 2 Start prime mover and bring up to rated speed RESULT Voltage should build up If not perform Field Flashing 3 Slowly adjust the regulator VAR CW until the generator output voltage reaches the nominal value If used adjust the remote VAR to set the generator voltage to the exact value desired RESULT Voltage should build up to rated value If voltage does not build up to rated value check generator for short or excessive load 4 Check r
6. the following figure EXCITER FIELD VOLTAGE VOLTS After output power is removed the regulator can be reset by decreasing the input voltage to less than 6 Vac for a minimum of 2 seconds this may be accomplished by stopping the prime mover or by Figure 2 interrupting the regulator input with a reset switch Typical Time Delay Characteristic Curve 2 EA63 4 2 OPERATION PROCEDURE 2 1 STABILITY ADJUST RHEOSTAT STAB e An internal screwdriver adjustable potentiometer provides adjustment to the response rate of the generator output voltage to a change in load e Clockwise rotation of this adjustment provides an increase in the response time and therefore decreases the amount of voltage overshoot increased stability Counter clockwise rotation of this adjustment provides a decrease in the response time faster response time and therefore increases the amount of voltage overshoot decreased stability 2 2 OPERATION The following system operation procedures provide instructions for adjusting the EA63 4 voltage regulator Symptoms resulting from a faulty regulator and certain generator system problems are included together with suggested remedies CAUTION Meggers and high potential test equipment must not be used Incorrect use of such equipment could damage the semiconductors contained in the regulator 2 3 PRELIMINART SET UP 1 Verify that the voltage regulator specifications conform with the generator system r
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