Self Excited Automatic Voltage Regulator 120V or 240V
Contents
1. E MALGO Self Excited Automatic Voltage Regulator 120V or 240V Compatible with Newage Stamford SX460 regulator Features Voltage regulation lt 1 Soft start voltage ramping Sensing voltage loss protection 120 or 240 Vac sensing jumper selectable Under frequency roll off protection With under frequency LED indicator All manufacturer names numbers symbols and descriptions are used for reference purpose only and do not imply that any part is the product of these manufacturer Specifications Sensing Input Voltage 120 95 132 or 240 190 264 Vac External Volts Adjustment 7 with 1K ohm 1 watt trimmer 1 phase 2 wire jumper selectable Unit Power Dissipation Max 10 watts Frequency 50 60 Hz jumper selectable Soft Start Ramp Time 2 sec Output Voltage Max 90 Vdc at 207 Vac input Under Frequency Protection Current Continuous 4A Set Point 95 Hz Factory Knee Point Setting 170 down to 30 Hz Operation Temperature 40 70 C Intermittent 10A for 10 sec Slope Resistance Min 15 ohms Environment Volts Regulation Build Up Voltage Thermal Drift lt 1 with 4 engine governing Storage Temperature 40 85 C Residual volts at AVR terminal gt 5 Vac Relative Humidity Max 95 0 05 per C change in AVR ambient Vibration 3 3Gs 100 2K Hz Mechanical Specifications AVR Control Function 100 0 45 0 VOLT Voltage adjustment 80 0 20 0 STA2. achieve the necessary build up voltage for the regulator If reversing the field connections does not induce build up and the residual voltage is less than the specified value of 5 VAC shut down the Prime mover and proceed with the following steps With the Prime mover at rest and the regulator s field output wires disconnected apply a DC source NOT grounded of no more than 3 12 VDC with Positive to F and Negative to F in series with a current limiting resistor of 3 5 ohms 20 watt The set battery is a suitable source Allow approximately 3 seconds before removing the DC source 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 1 and 2 If residual voltage is greater than 5VAC but AVR still unable to build up voltage please replace with another AVR WARNING Overly field flashing may damage the AVR or generator excitation winding Please make sure you have read and understand the contents of the instruction manual prior to installation Incorrect wiring connection may result in irreversible damage to the product and other equipments EA460
3. 2 second If the voltage still stable the adjustment is now completed Otherwise increase the stability slightly repeat procedure 10 until stability is reached 4 ADJUSTMENTS 4 1 Frequency Roll off Adjustment As using 50Hz please connect a jumper between Com and 50Hz As 60Hz between Com and 60 Hz To reset the frequency roll off proceed as follow Startup engine and build voltage 2 Adjust the engine speedy down to low frequency 3 Adjust the front panel U F control until the output voltage low about 5V than nominal voltage For 50Hz applications the frequency Roll off is factory preset to 45Hz for 60Hz operation the frequency is 55Hz 4 2 Voltage Adjustment i Adjust the front panel VOLT to vary the generator nominal voltage If used a 1000 15009 1 2 watt potential meter may be connected to terminals VR and VR refer to Figure 4 4 3 Stability Adjustment i Adjust the front panel STAB control the system stable Rotation of the front panel STAB control in the counter clockwise CCW direction will speed response time If rotated too for CCW the generator voltage my oscillate hunt Rotated the front panel STAB control CCW until the system start oscillating and then rotate cw just past the point where oscillation occurred 5 FIELD FLASHING When the regulator is operated with the generator for the first time the polarity of residual magnetism may be reversed or too small to
4. B Stability adjustment E UFRO Setting under frequency protection knee point Oa g Physical Specification Dimensions 135 0 L x 100 0 W x 45 0 H mm Weight 243 g 2 ojo 8 UFRO Len ott O Pe y e 5 4 Unit mm thee TARAS Fa TEL 506 2293 5586 FAX 506 2293 1390 KUTAI ELECTRONICS INDUSTRY CO LTD www setecom com for detailed manual Ts vour ATTENTION i 1 AVR can be mounted directly on the Va engine genset switchgear control panel or any position that will not affects operation For dimension reference please see Figure 1 aimjexedwa BIH i ONINNVM 2 All voltage readings are to be taken ww O oS with an average reading voltmeter Meggers and high potential test equipment must not be used Use of 5o 4 Hi a m such equipment could damage the AVR STAB LO 8 d ent EE eee E Outline Drawing UNITS mm Figure 1 120 120 w w 0 0 lt lt a 100 a 100 Z z 80 a z 80 52 50HZ soHz 52 ae as EZ E 50 50 60 O Z z ow cc OO 4 OO v lt x z amp oo cc W 20 w 20 Z Z ii ii oO oO 0 10 20 30 40 50 60 0 1 2 FREQUENCY HZ SOFT START V Sec F
5. not touch the warning signal of the heat sink 3 3 System Startup 1 Ensure all the wire of the regulator are correctly connected and the proper fuse 5A250V is installed 2 Turn voltage potentiometer full anticlockwise lowest voltage level 3 If used turn external voltage potentiometer to the middle position 4 Turn stability potentiometer full clockwise highest stability level 5 Connect a 110VDC meter across the field with proper polarity 6 Connect a 300VAC meter across line to neutral of generator 7 Start and run the generator at no load and rated speed The generator output voltage should build up to a minimum level if the voltage does not build up It may cause by low residual voltage of generator Refer to field flashing section in generator manual 1 The surface temperature pf the EA460 will be 8 Slowly adjust voltage potentiometer until the over 60 C generator voltage reach the proper value 2 EA460 D e 1 Ops l Eto R 1 2 ik 2N X 8 put voltage selection S stbad C Wiring and adjustment Figure 4 Note 1 When there is no connection to VR 1 and 2 must be joined 2 When LED lamp is light on it means the frequency isn t enough The output voltage will decrease to preve
6. nt over load exciting current to damage the exciter field winding 6 TROUBLE SHOOTING SYMPTOM CAUSE CORRECTION Voltage does not Residual voltage below 5VAC build up Incorrect wiring connected Generator not up to speed Flash generator field with proper method Check wiring diagram for proper connection Power sensing or field wires not Connect the wires properly Increase generator speed Out voltage low Poor adjustment is made Frequency roll off Incorrect voltage selection Read start procedure carefully and adjust again Increase generator speed Read user s manual to select correct voltage Out voltage high Poor adjustment is made Incorrect voltage selection Read start procedure carefully and adjust again Read user s manual to select correct voltage Out voltage instable Poor adjustment is made the rang of regulator Read start procedure carefully and adjust again Field voltage requirement lower Inquire our distributor to solve X 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 EA460 9 Turn the stability potentiometer clockwise until instability is shown and then turn it anticlockwise slightly still both meter mention in 5 and 6 shown stable 10 Interrupt regulator power for a short time approximately 1 to
7. requency Compensation Curves Soft Start Curve Figure 2 Figure 3 4 EA460 1 SPECIFICATION Sensing Input Voltage 95 132 VAC or 190 264 VAC 1 phase jumper selectable Frequency 50 60 Hz selectable Output Voltage Max 90 VDC 207 VAC Current Continuous 4A Intermittent 6A for 10 sec Resistance Min 15 ohm Voltage Regulation lt 1 5 with 4 engine governing Voltage Build up Residual voltage at AVR terminal gt 5 VAC Thermal Drift 0 05 per C change in AVR ambient 2 WIRING Refer to Figure 4 1 2 Connect F1 F2 to DC output port Connect the sensing port at 7 8 the factory setup is 220V if 110V is required please join 3 4 3 External voltage regulator is as Figure 4 4 Connect a jumper from COM to the 50Hz terminal for 50Hz operation Note Please install 5A 250V fuse at power input port as Figure 4 3 NOTICE OF USE 3 1 3 1 See Figure 1 The connection and examination procedures must be executed by the profession engineers Place the EA460 inside of the generator especially the moisture proof and anticorrosive space 2 Startup Procedure External Volts Adjustment 7 with 1K ohm 1 watt trimmer Unit Power Dissipation Max 10 watt Under Frequency Protection Set point 95 Hz UFRO Slope 170 down to 30 Hz Soft Start Ramp Time 2 sec Dimensions 135mm L 100mm W 49mm H Weight 243g 2 2 When operations please do
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