Generator Automatic Voltage Regulator Operation Manual
Contents
1. of such equipment could damage the AVR place with high vibrations to prevent loose connections For safety do not touch the heat sink while in operation With 4mm crimping terminal EAI6 2 1 CONNECTION TERMINAL P1 P2 Power Input Terminals from 60 to 300VAC 50 60Hz 16A rated F F Maximum Output current 16A VS1 VS2 Voltage sensing input terminals Volts selected using DIP SW1 for 220V or 440V K L Load Current Compensation Droop CT secondary current input selected by using DIP SW 1A or 5A If droop not used leave terminals open VR1 VR2 External Voltage trim use 2K Ohms 1 watt trimmer for 5 voltage adjustment Keep terminals shorted when not in use A1 A2 Analogue Voltage Input terminals used for Power Factor correction from a external PLC The PLC controls provides a DC voltage signal to adjust the generator voltage Max Adjustment range is 5VDC Keep terminals open when not used DIP Switch SW1 OFF 220VAC 170 to 260VAC ON 440VAC 340 to 510VAC OFF CT Secondary Input 1A ON CT Secondary Input 5A OFF Generator Frequency 60Hz 52 61Hz Adjustment SW2 SW3 ON Generator Frequency 50Hz 42 51Hz Adjustment SW4 OFF Over excitation protection enabled ON Over excitation protection disabled LED Indicator U F Under Frequency Indicator O E Over Excitation Indicator ADJUSTMENT AND SETTING TRIM works together with a bi2. EAI Generator Automatic Voltage Regulator Operation Manual Self Excited 16 Amp Analog Digital Voltage Regulator for use in 170 510 VAC brushless generators with paralleling compatibility HORELI RAROS KUTAI ELECTRONICS INDUSTRY CO LTD 90 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 156 0 1 SPECIFICATION Sensing Input Voltage 170 510 VAC Single Phase 2 wires Voltage is DIP Switch selectable Frequency 50 60 Hz DIP Switch selectable Power Input Voltage 60 300 VAC Single Phase 2 wires Output Voltage Max 90 VDC 240 VAC input Current Continuous 16A Intermittent 20A for 10 sec Resistance Min 5 ohm Voltage Regulation lt 0 5 with 4 engine governing Voltage Build up Residual voltage at AVR terminal gt 5 VAC Thermal Drift 0 03 per C change in AVR ambient Load Current Compensation 1A or 5A Max 7 PF 0 5 DIP Switch Selectable Analogue Voltage Input Max 5VDC 10 3VDC Over Excitation Protection Max Output DCV 95 20sec External Volts Adjustment 5 with 2K ohm 1 watt trimmer Unit Power Dissipation Max 10 watt Under Frequency Protection Factory Setting 50 60 Hz DIP SW selectable Soft Start Ramp Time 2 Sec Dimensions 156mm L 106mm W 43mm H Weight 450g 2 The EA16 AVR is an update of the EA15A AVR It is similar to th
3. as voltage applied to terminals A1 and A2 This signal is supplies by an external Power Factor Paralleling PLC Use the TRIM potentiometer to adjust the DC voltage input that controls the level of the generator s output voltage When set counter clockwise the control level is zero and if moved clockwise the maximum control range is 10 The signal connected to A1 and A2 can be unipolar 0 or bipolar Check with the manufacture of the Paralleling control PLC 2 DROOP Select switch K or L pending on the secondary current of the CT that you are using Voltage droop works when the CT and the AVR senses that the output of the generator voltage and current waveforms are out of synch and the AVR droops the output voltage of the generator to correct it STAB If the generator output voltage oscillate adjusting the STAB potentiometer will stabilize the output voltage over adjustment will result in high voltage variation when load is applied Use an analog type multimeter when making this adjustment Connect the meter to terminals F and F and slowly adjust STAB potentiometer to the point when the pointer stops moving VOLT Move to set the generator output voltage Set DIP Switch 1 to the generator working voltage Set SW1 to OFF 220V for use from 170 to 260V Set SW1 to ON 440V for use from 340 to 510V When using and external VR set it to the central position and adjust the AVR VOLT trim to the rated volta
4. e original EA15A in power and voltage sensing capabilities but with new enhanced paralleling functions the user can now select the CT inputs either 1 amp 5 Amp or use new A1 amp A2 analogue signal inputs terminals for use with PLC paralleling controls It has new over voltage excitation safety circuits to prevent damage caused by the accidental detachment of the sensing wires or irregularities on the generator s excitation circuits 106 0 88 0 8 M 4 F 1 Ji e N 3 18 7 Ue fa T gt E z p D 3z Ed T 26 ee allie B 2 2 2 2 o fail O TRIM DROO STAB VOLT UF SW UF OF 5 0 UNIT mm Figure 1 Outline Drawing AVR can be mounted directly on the engine All voltage readings are to be taken with an Secure all wiring connection Do not install AVR at a 4 Fuse specification 16A 250V slow blow type Terminal Fast On terminals 6 35mm 1 4 inch amp ATTENTION genset switchgear control panel or any position that will not affects operation For dimension reference please see Figure 1 average reading voltmeter Meggers and high potential test equipment must not be used Use
5. ection connected Burnt fuse Change fuse 16A 250V Ext Switch Breaker not turned on Switch on ON Engine RPM under speed Increase engine speed frequency above25HZ Out voltage low Poor adjustment is made Read start procedure carefully and adjust again U F protection activated Increase generator speed U F activated Incorrect voltage Read user s manual to select correct voltage selection Out voltage high Poor adjustment is made Read start procedure carefully and adjust again Incorrect voltage selection Read user s manual to select correct voltage Out voltage instable Poor adjustment is made Read start procedure carefully and adjust again Field voltage requirement lower Inquire our distributor to solve the rang of regulator xX Use only original supplied spare protection fuse for fuse replacement Please accept our sincere apology if any modification in performance specification or appearance is made without prior notice 6 EAI6
6. ge NOTE If the external VR is not used short terminal VR1 and VR2 U F Under Frequency protection setting At 60Hz U F factory set at 55Hz At 50Hz U F factory set at 45Hz To adjust the U F setting select the correct system frequency start engine and adjust engine speed to the required U F frequency for example 55Hz or 45Hz slow adjust U F potentiometer until the U F red LED turn ON returning the engine speed to normal turn the LED off Function of the Under Frequency trim pot During start up or shutdown the engine speed changes going over or under its rated RPM Hz This AVR has an Under Frequency circuit to protect the AVR and exciter you do not need to disconnect the AVR when idling the engine If load is higher than the generator s capacity the EAI6 Under Frequency activates reducing the generators voltage preventing generator overload 3 6 Over Excitation Protection This AVR has over Excitation Protection preventing the generator from working under unusually high excitation Excitation Protection includes generator overload accident removal of sensing wires and incorrect voltage setting When problems occur the AVR will gradually shutdown the excitation voltage to the minimum residual voltage If the O E LED turn ON and stays ON you need to reset the AVR by shutting the engine for 10 seconds When working the generator in parallel this protection is n
7. ot required the user can disable this function by switching DIP switch SW4 to ON position vice versa 4 NOTICE OF USE 1 N Installation Notice Refer to Figure 2 and 4 Only a trained professional can Installation calibrate and inspections this AVR Install this AVR inside the generator enclosure away from moisture corrosion and from any easy to reach area Generator Operation Notice During operation the temperature on the surface of the AVR can reach higher the 60 C 140 F DANGER When the AVR is working never touch or ground the heat sink on the AVR The AVR heat sink is an electrically live terminal A warning sticker is in place on top of the heat sink 5 FIELD FLASHING When operating this AVR for the first time the polarity of the residual magnetism may be reversed or too weak to achieve the necessary build up on the regulator If reversing the field connections does not induce build up and the residual voltage is less than 5 VAC shut down the Prime mover and proceed with the following steps 1 Stop the generator and disconnect the field wires F and F apply a DC Voltage using a batteries positive terminal to F and the negative terminal to F using a current limiting resistor of 3 5 ohms 20 watt Allow approximately 3 seconds before removing the battery 3 4 Disconnect the AVR AC power input terminals and restart the generator re measure the residual
8. voltage If this voltage is greater than 5VAC reconnect voltage regulator and voltage build up should be successful If measured less than 5VAC repeat steps 5 1 and 5 2 If repeating steps 5 1 and 5 2 does not result in generator voltage build up and residual is greater than 5VAC replace with a new voltage regulator CAUTION Over excite may damage the AVR or the exciter EAI6 Al A2 Al A2 Figure 2 Paralleling Connection z400 P1 P2 F F VS1 VS2 K L A1 A2 Field z409 P1 P2 F F VS1 VS2 K L A1 A2 Aux N Winding 60 300v z 44 D Al A2 Figure 5 Auxiliary Winding EAI6 6 TROUBLE SHOOTING SYMPTOM CAUSE CORRECTION Voltage does not Residual voltage below 5VAC Reference from 5 Field Flashing build up F F polarity reversed F and F reverse the connection F F P1 P2 VS1 VS2 not Reference from Figure 3 and 4 conn
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