Generator Automatic Voltage Regulator Operation Manual
Contents
1. controls It has new over voltage excitation safety circuits to prevent damage caused by the accidental detachment ofthe sensing wires or irregularities on the generator s excitation circuits Dimension For dimension and mounting refer to Figure 1 The protection fuse capacity is 16A 250V slow blow type Connection terminal specification 6 35mm 1 4 inch Fast On terminals with 4mm crimping terminal ATTENTION Use an average reading type voltmeter for voltage readings Do not use Meggers and high potential test equipment that could damage the AVR Secure all wiring connection Do not install AVR at location with too much vibration to avoid loose connections Do not touch the heat sink while operating 156 106 41 88 aNnr Lze 138 TRIM DROOP STAB VOLT UF SW UF OF Figure 1 Outline Drawing Unit mm SS16A2 2 Terminal Description 2 1 2 2 2 3 2 4 2 2 2 6 2 7 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 400V S1 S2 Load Current Compensation droop CT secondary current input selected by usng DIP SW21A or SA if droop not used leave terminals open VRI VR2 External Voltage trim connection 2K Ohms 1 watt trimmer for 5 voltage adjustment Keep terminals shorted when not in use Al A2 Analogue Voltage2. is higher than the generator s capacity the Under Frequency activates reducing the generator s voltage preventing generator overload 3 6 Over Excitation Protection JUMPers 1 2 3 3 6 1 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 settng 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 not required the user can disable this function by placing the jumper from terminals JUMP 2 to 3 To reactivate protection place the jumper back to 1 and 2 4 Notice of Use 4 1 Installation Notice refer to Figure 2and 4 4 1 1 Only a trained professional can Install calibrate and inspections this AVR 4 1 2 Install this AVR inside the generator enclosure away from moisture corrosion and from any easy to reach area 4 2 Generator Operation Notice 4 2 1 During operation the temperature on the surface of the AVR can reach higher the 60 C 140 F 4 2 2 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 4 SS16A2 5 F
3. 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 rangeis 5VDC Keep teminals open when not used adjust TRIM to change bias volts DIP Switch 1 to 3 SWI OFF sensing voltage from VS1 to VS2 170 to 260VAC ON sensing voltage from VS1 to VS2 340 to 510VAC SW2 OFFuse 1A CT ONuse 5A CT SW3 OFF 60Hz ON 50Hz 2 8 LED Indicator U F Under Frequency Indicator O E Over Excitation Indicator JUMP Terminals 1 2 and 3 If 1 and 2 shorted Over Excitation Protection is OFF If 2 and 3 Shorted Over Excitation Protection is ON 3 Adjustment and Setting 3 1 3 2 3 3 TRIM works together with a bias voltege applied to terminals Al and A2 This signal is supplies by an extemal 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 counterclockwise the control level is zero and if moved clockwise the maximum control range is 10 The signal connected to Al and A2 can be unipolar 0 4 or bipolar Check wih the manufacture of the Paralleling control PLC DROOP Select switch S2 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 voltag
4. SOU OAZ Generator Automatic Voltage Regulator Operation Manual S16A2 Universal 16Amp Self Excited Automatic Voltage Regulator for use in 220 380 440 480 600 VAC brushless generators with paralleling compatibility 1 SPECIFICATION Voltage 170 to 510 VAC Single Phase 2 wires Sensing Input Voltage is DIP Switch selectable Over Excitation Max DCV 95 20Sec Protection Frequency 50 60 Hz DIP Switch selectable Power Dissipation Max 3 Watt Voltage 60 300 VAC Single Phase 2 wires Under Frequency Power Input 50 60 Hz DIP SW selectable Protection Output Voltage Max 90 VDC 240 VAC Input Current Continuous 16A Intermittent 20A for 10 sec Resistance Min 50 Soft Start Ramp Time 2 sec Volt E l Sage lt 0 5 with 4 engine governing Thermal Drift Regulation Voltage Build up Residual voltage at AVR terminal gt 5 VAC External Voltage 5 with 2K Ohms 1 Watt trimmer Adjustment Dimensions 41mm H 156mm W 106mm D Load Current 1A or 5A Max 7 PF 0 5 DIP Switch Selectable Compensation Weight Analogue Voltage 3VD Max 10 Input The SS16A2 AVR is an update d the SSI5A2 AVR It is similar to the original SS15A2 in power and voltage sensing capabilities bu with new enhanced paralleling functions the user can now select the CT inputs either 1 amp 5 Amp or use new Al amp A2 analogue signal inputs terminals for use with PLC paralleling
5. al voltage below 5V AC Reference from5 1 and 5 2 not build up F F polarity reversed F and F reverse the connection F F Pl P2 VS1 VS2 not connected Reference from Figure 2 and 3 connection Burnt fuse Change fuse 16A 250V Ext Switch Breaker not turned on Switch on ON Engine RPM under speed Increase engine speed frequency above25HZ 6 SS16A2 e L1 R GEN e L2 s 480 277 e L2 T e N Neutral maak eee Set DIP switch SS16A2 to 480 380 sensing Figure 3 380 480V Connection Output voltage o Read start procedure carefully and adjust Low y again U F protection activated Increase generator speed U F activated Incorrect voltage Read user s manual to select correct voltage selection Output voltage Read start procedure carefully and adjust Poor adjustment is made High again Incorrect voltage selection Read user s manual to select correct voltage Output voltage Poor a djustment is made Read start procedure carefully and adjust Unstable agan Field voltage requirement lower the rang Inquire our distributor to solve of regulator P S Use the factory supplied fuse only SSISA2 7 N R s T Parallel Switch Parallel Switch VS GENS Parallel Switch Figure 5 Current Compensation parallelin
6. e of the generator to correct it STAB If the generdor aitput voltage oscillate adjusting the STAB potentiometer will stabilize the output voltage over adjustment will result in ligh 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 SS16A2 3 4 VOLT Move to set the generator output voltage Set DIP Switch 1to the generator working voltage Set SW1 to OFF 220V for usefrom 170 to260V Set SW1 is ON 400V 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 voltage Note If the external VR is not used short terminal VR1 and VR2 3 5 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 exanple 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 ofthe Unde Fequency tim pot 3 5 1 Durng 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 3 5 2 If load
7. g connection NOTE 1 connect AVR as shown in Figure 5 when paralleling three generators or more 2 The polarity of the CT is shown in Figure 5 SS16A2 Bulsuas 0A QZZ o1 U 1IMS did 19S LT TSTSTST PT ESTATE any SR4 Caterpillar Generator c o e fr lt gt Og otc Og Go CD CC cn n O 0
8. ield 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 ad the residual voltage is less than 5Vac shut down the Prime mover and proceed with the following steps 5 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 acurrent limiting resistor of 3 5 ohms 20 watt 5 2 Allow approximately 3 seconds before removing the battery 5 3 Disconnect the AVR AC power input terminals and restart the generator re measure the residual 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 5 4 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 Warning Over field flashing could damage the AVR or generator exciter 10 7 4 1 L1 R GEN 2 280 277 e 28s 3 L2 T N Neutral ala Tete Ir Tor Tos T Set DIP Switch SS 1 6A2 to 220 volt Sensing This is the most commun connection Figure 2 220V Connection R S T N Figure 4 Paralleling Connection RS T N 6 TROUBLE SHOOTING SYMPTOM CAUSE CORRECTION Voltage does Residu
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