EA Generator Automatic Voltage egulator Operation Manual uitable for ingle or hree Phase elf Excited rushless Generator Compatible replacement for Mecc Alte U * ot a genuine Mecc Alte product. Headquarters : o., Lane 2, Chien Fu., Chyan Jenn Dist., Kaohsiung, AIWA el : 8878277 Fax : 8878277 UL : http://www.kutai.com.tw
. UMMAY EAA is equipped with separate sensing inputs (2,, terminals.. phase), which can survey from single up to three phase voltages and check the average voltage from Y YY or wiring accordingly to the generator requirement or user preference. 2. PECIFICAIO ensing Input Voltage ange 7 ~ 28VAC / 27 ~ 2VAC (ingle phase or phase selectable by wiring) / Hz Power Input, 2 Voltage ~ 28V / Hz Output, Voltage Current Exciter DC esistance ~ Ohm Output VDC Continuous A Max. Intermittent 7A for sec Voltage egulation < ±% (with % engine governing) Voltage uildup esidual voltage at A terminal > VAC, 2Hz External K ohm /2 watt ± % he A is equipped with adjustable under frequency protection and over voltage protection to prevent generator from overloading and over excitation. he LED each represents (Green) normal operation, (ed) under frequency and (Yellow) over excitation. he built in EM filter helps to prevent possible interference from the A to the generator. Over Excitation Protection 2 ~ VDC @. ~ 2sec Under Frequency Protection Adjustable range 2 ~ 2 Hz EMI uppression Internal electromagnetic interference filtering Unit Power Dissipation Max. watt Operating temperature ~ C torage temperature ~ 8 C Dimensions mm L *.7mm W *.2mm H Weight 2g ± 2% KUAI 2 MODEL EA OULIE / DIMEIO. A can be mounted directly on the engine, genset, switchgear, control panel, or any position that will not affects operation. For dimension reference, please see Figure. MODEL EA KUAI 2. ecure all wiring connection. Do not install A at a place with high vibrations to prevent loose connections. For safety do not touch the heat sink while in operation.. Fuse specification : 2mm.A / 2V. Outline and Drilling Diagram UI : mm Figure 2 EA
. WIIG / ADJUME. Excitation Wiring, Connect A terminal to field, connect A terminal to the field. OE he Exciter field resistance is between ~ Ohm. If field resistance is less than Ohm when generator is under full load and the field voltage is under the maximum output, please series a suitable wattage (W) resistor to have the overall field resistance to equal to ~ Ohm..2 ensing / Power Input 2 otal of sets of independent sensing inputs, each input voltage equals to 22V (Center), can be series into Y or to connect to the generator output ( Phases) for example,,, or joint connected into a single phase sensing (ee Figure 2 to ). erminal, 2 is the A power input, voltage range from ~ 28V.. Frequency election ( Hz) When the 2 terminals marked as Hz on the A is bridged, the system frequency is Hz. In the contrary, when bridge is removed the system frequency is Hz.. External Voltage Adjustment Connect a K Ohm /2W voltage rheostat at terminals to enable a ±% voltage adjustment from rated voltage. * he terminals must be bridged when the external voltage adjustment function is none required.. erminals, can remain not connected. VOL. Voltage Adjustment User can adjust the generator voltage by rotating the VOL potentiometer on the A. otate the potentiometer clockwise to increase voltage and decreasing when rotate counterclockwise. he voltage adjust rate is less than % when the power factor equals to to.8 (PF to.8) and frequency variation within %..7 A. tability Adjustment lowly and precise adjustment of A potentiometer can change the respond time between the A and generator. Inadequate adjustment will cause voltage instability and over adjusting will cause sudden overly voltage variation under heavy load. Analogue type multi voltmeter is suggested when adjusting the voltage stability. Adjust the A potentiometer until the pointer on the multi voltmeter is oscillating to its minimal..8 Circuit Protection AMP. Over Excitation Protection Adjustment (Overload protection) et the AMP Overload protection value (2 to VDC) according to the generator maximum excitation voltage. When over excitation occurs wait for 2 seconds then decrease the generator voltage to to VAC. When the Over excitation protection is activated the yellow LED will illuminate, the higher the over excitation value is the shorter delay time becomes. he generator will require stopping operation to reset. Hz. Under Frequency Protection Adjustment Hz. Is used to set the under frequency protection knee point. When the generator frequency declines to setting point, the generator voltage will also decrease in the same time to prevent high excitation current from damaging the A or the exciter, adjustment procedure :. tart generator and let voltage build up. 2. Adjust engine frequency to the appropriate low frequency value.. lowly adjust Hz. Potentiometer until the red LED illuminates.. OPEAIO POCEDUE. Please confirm the follow condition before starting the generator : tarting etting. Confirm if the A specification conforms to the system requirements? 2. Confirm the A wiring?. Confirm correct frequency selected?. Confirm the generator rated voltage with the A sensing input?. Adjust VOL potentiometer fully counterclockwise? EA
Adjust A potentiometer to the center position? Adjust AMP potentiometer fully clockwise?.2 tarting Generator. econfirm all setting and wiring. AEIO he A reading AC voltage are all average value. 2. tart generator and adjust to rated frequency. he first measured voltage value should be under the rated voltage. If not, then reconfirm the start setting.. lowly adjust VOL potentiometer to the rated voltage, at this time the generator voltage may become unstable. Adjust the A. potentiometer anticlockwise, until the oscillation stabilizes. Over adjustment may cause short oscillation when load applied or load type varies. UGGEIO Adjust the A. potentiometer to the point where the oscillation occurs and then adjust the potentiometer counterclockwise by / of rotation.. If voltage can not be adjusted or to the rated value, please check to see if the generator frequency is too slow (Under frequency protection activated). If residual voltage is below VAC, then please execute field flashing to help build up the residual voltage.. Make sure the generator and A are both under normal operation conditions.. he voltage adjustable range should be ±% under no load or full load. If the adjustable range in not within such range, please check the below : Generator under frequency (Lower than low frequency protection knee point). everely deformed generator output wave form. Capacitive load over ratio (Power factor in lead). Change the A and restart. Under over excitation voltage protection (Overload protection).. Flashing (ee Figure 2) When the regulator is operated with the generator for the first time, the polarity residual magnetism may not correct or the magnitude not enough. If the generator does not buildup after startup, shut down the prime mover and proceed with the following steps:. top generator operation, disconnect A and wirings then apply a DC source (ot grounded) of not more than 2VDC, to generator F (Positive) and F (egative) in series with a limiting resistor of to ohms 2 watt. 2. Allow approximately seconds before removing the dc source.. tart generator and measure residual voltage at generator leads ~. If measured voltage is greater then VAC please carefully reconnect all A wirings. Please repeat field flashing procedure if less than VAC residual voltage is measured.. If residual voltage is greater than VAC, but A still unable to build up voltage, please replace with another A. WAIG Overly field flashing may damage the A or generator excitation.. Maintenance egular maintenance to make sure the A surface is clean and free from oil or moisture. All connection terminals and wirings must be firmly tightened and no signs of visible oxidation or erosion. AEIO All voltage readings are to be taken with an averagereading voltmeter Meggers and highpotential test equipment must not be used. Use of such equipment could damage the A. EA
~Ω 2w Delta 2 2 Figure 2 Flashing Figure Ø 2 / 2V With auxiliary Delta Delta 2 2 Figure Ø 22V Figure Ø 22 / V 2 2 Figure Ø 22V With auxiliary Figure 7 Ø 22V 2 2 Figure 8 Ø 22V With auxiliary Figure 9 Ø 22V EA
2 2 Figure Ø 8 / 8V With auxiliary Figure Ø 8 / 8V 2 2 Figure 2 Ø > 8V With auxiliary Figure Ø > 8V EA For eplacing Mec Calte 7 Diagram C A 7 erminal C A 7 erminal 2 2 Figure Ø 22V With auxiliary Figure Ø 22V C A 7 erminal C A 7 erminal 2 2 Figure Ø 8 / 8V With auxiliary Figure 7 Ø 8 / 8V 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. EA