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EA15A3H

1. EAISA3H 2 Rotation of the front panel STAB control in the counter clockwise CCW direction will speed response time If rotated too much for CCW the generator voltage my oscillate hunt 3 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 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 1 With the Prime mover at rest and the regulator s field output wires disconnected apply a DC source NOT grounded of not 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 2 Allow approximately 3 seconds before removing the DC source 3 With the voltage regulator disconnected wires 3 and 4 start the prime mover and measure the residual voltage available at the auxiliary winding If this voltage is greater than 5 Vac reconnect voltage regulator and voltage build up should be successful If less than 5 Vac is measured repeat field flashing procedure 4 If repeatin
2. BATIDAS Generator Automatic Voltage Regulator Operation Manual Self Excited Automatic Voltage Regulator 15 Amp 3 Phase Sensing AVR HURRA LARAOS 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 Voltage 180 500 VAC 3 phases wire Freguency 50 60 Hz selectable Power Input Voltage 100 300 VAC 1 phase 2 wire Output Voltage Max 90 VDC 240 VAC input Current Continuous 15A Intermittent 20A for 10 sec Resistance Min 9 ohm Voltage Regulation lt 0 5 with 4 engine governing Voltage Build up Residual voltage at AVR terminal gt 5 VAC 2 WIRING Refer to Fig4 Fig5 2 1 Terminals F amp F e The DC output port of the regulator e F is positive normally connected to the field of generator marked F FT or J e F is negative normally connected to the field of generator marked F F2 or K 2 2 Terminals sensing e The power and sensing port of the regulator Sensing voltage had been connected on 220 380 440 480V three phase from generator e Single phase will cause output voltage 27 exceed nominal value 2 3 Terminals EXT VR e For external voltage adjustment if required 2 4 Terminals 50 amp COM e Under frequency protection selection e Connect a jumper from COM to
3. ES S O ODA O o D VR VR 50Hz COM STAB VOLT U F 2 Close 50HZ Open 60HZ EXT VR EAISA3H ni a VAAN Zu5 OHM SM O ad ES sne DIODE BATT F koz Flash with Battery Figure 5 6 TROUBLE SHOOTING SYMPTOM CAUSE CORRECTION Voltage does not Residual voltage below 5VAC Flash generator field with proper method build up Incorrect wiring Check wiring diagram for proper connection Power sensing or field wires not Connect the wires properly connected Generator not up to speed Increase generator speed Over excitation Restart the generator Out voltage low Poor adjustment is made Read start procedure carefully and adjust again Frequency roll off Increase generator speed Incorrect voltage selection Read user s manual to select correct voltage Out voltage high Poor adjustment is made Read start procedure carefully and adjust again Mai ring mra rr rr 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 X Use only original supplied spare protection fuse for fuse replacement x Please accept our sincere apology if any modification in performance specification or appearance is made without prior notice EAISA3H 5
4. g steps a and b does not result in generator voltage build up and residual is greater than 5 Vac replace voltage regulator GENERATOR OUTPUT VOLTAGE OF NOMINAL 150 0 135 0 114 5 130 0 ojojo ekekeke 120 80 60 40 20 50HZ 60HZ Frequency compensation curves 10 20 30 40 50 FREQUENCY HZ Figure 2 F F POWER 480380 OE O 380 480 E1 zvo Da O ODA O O O VR VR 50Hz COM STAB VOLT U F Z Close 50HZ Open BOHZ EXT VR GENERATOR OUTPUT VOLTAGE OF NOMINAL ao A 120 100 80 60 40 20 Wiring Diagram Figure 4 Outline Drawing Figure 1 UNIT mm 0 1 2 SOFT START V S Soft start curve Figure 3 F F POWER 480380 oe 0 380 480 E
5. oes not build up lt may cause by low residual voltage of generator Refer to field flashing section in generator manual 8 Slowly adjust voltage potentiometer until the generator voltage reach the proper value 9 Turn the stability potentiometer clockwise uniil 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 2 second lf 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 Connect a jumper from COM to the 50Hz terminal for 50Hz operation or leave the two terminal unconnected for 60Hz operation To reset the frequency roll off proceed as follow 1 Adjust the prime mover RPM to the desired frequency compensation corner frequency roll off point 2 Adjust the front panel FREQ 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 1 Adjust the front panel VOLT to vary the generator nominal voltage 2 If used a 10002 1 watt potentiometer may be connected to terminals EXT VR refer to Figure4 4 3 Stability Adjustment 1 Adjust the front panel STAB control the system stable
6. the 50Hz terminal for 50 Hz operation or leave the two terminals unconnected for 60Hz operation Thermal Drift 0 03 per C change in AVR ambient External Volts Adjustment 15 with 1K ohm 1 watt trimmer Unit Power Dissipation Max 8 watt Under Frequency Protection Factory Setting 60 Hz system presets knee point at 55 Hz 50 Hz system presets knee point at 45 Hz Soft Start Ramp Time 2 SEC Dimensions 150mm L 135mm W 72mm H Weight 867 g 2 3 NOTICE OF USE The EA15A3H can be mounted in various place like generator control panel switchgear cabinets ect But prevent high temperature high moisture or severe vibration places See figure 1 for mounting dimensions The EA15A3H surface temperature will be over 60 C when operations DO not touch the heat sink 3 1 Startup Procedure 1 Ensure all the wire of the regulator are correctly connected and the proper fuse 15A500V 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 EAISA3H 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 d

EA15A3H

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