EVC600C User Manual
Contents
1. i Automatic voltage regulator E G A EVC600C User Manual EVC600C User Manual Ver 1 0 Date 2014 07 31 EVC600C SERIES Version Version Note 2014 07 31 Original release http www engga com cn Page 1 of 6 ENGGA a Introduction EVC600C Automatic Voltage Regulator AVR is alternator output voltage regulating equipment its design is based on half wave phase controlled rectifier principles and our company generator excitation characteristics It can be used for the auxiliary winding phase power Excitation Generator The feature is high stability fast response easy installation and maintenance etc Specifications Output Volatage Max 96V 220Vac Continual current 8A Max transient current 10A lt 10 second Field winding resistance Min 9O Power input voltage AC 180 250Vac 50 60Hz Power Max 1000VA 240 Vac Sense voltage AC 180 250Vac 220Vac System single phase 50 60 Hz 350 480Vac 400Vac System single phase 50 60 Hz Power consumption 5 VA Voltage adjustment range 180 300 Vac 350 500Vac Regulation 1 Thermal drift lt 0 05 C Response time 1 5s Build voltage The generator remaining excitation voltage will build voltage automatically 5Vac 25Hz Power consumption Max 40W Quadrature droop input CT rated current ratio is 5A Droop 0 6 0 8 power factor Operating temperature 30 C 80 C Relative humidity 95 Vibration 12 Gs 5 26 Hz 0 036 inch amplit2. on the back of the product can adjust the voltage refer to above picture Picture 4 Test wiring diagram Ch Bend Frequency 120 7 100 80 60 ra a 60Hz 40 Gens output voltage Rated voltage 10 20 30 40 50 60 HZ 47 57 1 Output frequency 50HZ 60Hz can be adjusted via FREQUENCY 2 The above two curves were EVC600C 50Hz and 60Hz output frequency s low frequency protection action curves Picture 5 generator frequency output voltage relation 400V system http www engga com cn Page 6 of 6
3. he regulator needs to be set by STAB potentiometer on the regulator Increase response time improve stability LF protection UFRO low speed protection settings Usually the factory s setting is in order to reduce the generator excition current when the generator speed is lower than 95 rated speed of the generator Adjust the protection points speed via adjust the potentiometer UFRO Such as Rated frequency 50Hz set the LF protection point 47Hz Rated frequency 60Hz set the LF protection point 57Hz Note The factory has been set up please do not adjust again Reduce the protection point s speed Parallel compensation DROOP The voltage regulator is suit for two similar generators operating in parallel provide the total reactive power to all generators in parallel running and makes correct allocation can achieved it via a external 5A current transformer to sense the generator U phase current and a build in voltage regulator DROOP circuit The voltage regulator provides two inputs S1 and S2 are connected to the current transformers When the generator is running in stand alone these terminals are usually shorted Clockwise increases the amount of C T signal injected into the AVR and increases the droop with lagging power factor cos With the control fully anti clockwise there is no DROOP CT detection signal and the voltage regulator phase sequence must be correct otherwise the generator would not normally work in paral
4. lel CT must be installed in different phases and the detection of the detection voltage Increase DROOP sensitivity Page 2 of 6 Automatic voltage regulator ENGGA EVC600C User Manual Level of sensitivity TRIM An analogue input A1 A2 is provided to connect to the Newage Power Factor Controller or other devices It is designed to accept dc signals up to 5 volts Increase sensitivity V V Vo Ft F ENGGA Mode EVC600C Sensing Input Vs Vize for 220 Vac 180 to 250 Vac S0 60Hz 10 Ve Vasa for 400 Vac 350 to 480 Vac 50 60Hz 10 Power Input 180 to 250 Vac 50 60Hz 10 Output 90Vdc 8A WWG DROOP TRIM UFRO STAB VOLT SOSO g z lt x 3 ama id Picture 1 Wiring Such as Picture 2 3 4 1 VR1 VR2 is remote voltage adjustment terminal When you need to adjust the voltage remotely can connect a 10KQ 100KQ 2W potentiometer between VR1 VR2 otherwise must be shorted 2 F F is excitation outputs connect the field winding inputs 3 X1 X2 is power supply inputs can connect an auxiliary winding phase power supply etc 4 VO V220 V380 is detection signal inputs connect to output terminal line voltage of generator 400Vac system generator output line voltage connect to VO and V380 Picture 2 asa reference 220Vac system generator output line voltage connect to VO and V220 Picture 3 as a reference 5 1 S2 is current compensation input ter
5. minal when parallel operation current transformer ratio is In 5A capacity is 5VA droop current transformer CT s output terminal lf the direction of rotation of the generator is A B C The generator S1 connect to CT s positive S2 connect to CT s negative f the direction of rotation of the generator is must reverse Note CT must install on the generator output terminal the phase line which one not provides the signals to the voltage regulator 6 A1 A2 is voltage adjustment inputs can connect the external t5Vd Each 1Vdc can adjust 5 generator terminal voltage pay attention to the polarity when connect http www engga com cn Build up excition When the first start of the regulator and generator maybe the residual magnetism can t reach the start up requirement of the regulator we need to do as following steps a Prime mover in a stopped state use a DC power supply don t higher than 12Vdc connect to the generator E1 E2 magnetizing to the generator please pay attention to that the polarity the power supply s positive pole connect E1 negative pole connect to E2 b Build up excition about 2s after power ups c After finished the a and b steps if the voltage is still not established please check the DC power supply Test EVC600C Performance tests and operation steps Picture 4 for reference 1 Adjust the VOLT potentiometer clockwise to the MAX the bulb should be off 2 Adjust the VOLT po
6. tentiometer counterclockwise to the MAX the bulb should be light 3 VOLT potentiometer can control the bulb just beginning to shine Page 3 of 6 i Automatic voltage regulator ENGGA EVC600C User Manual Exciter field CT a aaa wires IN SA s e F F Vi l i at EVC600C 1 S1 S2 is current reactive power compensation input terminal when parallel operation current transformer r atio is In 5A 2 A1 A2 voltage regulator inputs can connect the external 5Vdc 3 If need to adjust the voltage remotely can connect a 10 100KQ 1W potentiometer between VR1 VR2 otherwise MUST BE SHORTED Picture 2 400V system self motivation wiring diagram http www engga com cn Page 4 of 6 Automatic voltage regulator ENGGA EVC600C User Manual Exciter field T oo wires IN SA I EVCO00C 50Hz C 60Hz C BoA u 1 S1 S2 is current reactive power compensation input terminal when parallel operation current transformer r atio is In 5A 2 A1 A2 voltage regulator inputs can connect the external 5Vdc 3 If need to adjust the voltage remotely can connect a 10 100KQ 1W potentiometer between VR1 VR2 otherwise MUST BE SHORTED Picture 3 200V system self motivation wiring diagram http www engga com cn Page 5 of 6 _ Automatic voltage regulator ENGGA EVC600C User Manual 220Vac AU VOUN E S0Hz C 60Hz 001 Picture 4 VOLT knob
7. ude 27 52 Hz 5 0 Gs 53 1000 Hz Impugnable Above three orthogonal planes is 20 Gs Weight Net weight 0 62 kg Installation Use M4 bolts installed in the generator terminal box Dimensions in the Picture 1 http www engga com cn Automatic voltage regulator EVC600C User Manual Operating Instructions Jumper selection 1 when generator capacity is less than 90KW STABLITY set to A C 2 when generator capacity is between 90 550KW STABLITY set to B C 3 when generator capacity is more than 550KW STABLITY set to A B 4 when rated frequency is 50Hz FREQUENCY set to 50 when rated frequency is 6 0Hz FREQUENCY set to 60 Voltage VOLT Adjust the generator output voltage The generator output voltage can be adjusted according to the characteristics of the generator set usually the built in voltage adjustment potentiometer VOLT can adjust a big range of voltage 350 480 V or 180 300V If you want to adjust the voltage from the control panel or screen you can connect a suitable potentiometer to VR1 and VR2 terminal Mini power 2W Resistance is 10 KO 100KQ O Voltage rise Stability STAB The voltage regulator provides a built in stable adjustment circuit wide range of applications This operation can set the field winding s react to meet the characteristics of the factories and different engines Such as diesel engine turbine get the best voltage response change the stability characteristics of t
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