Kutai electronics EA05A Manual de usuario

EA05A

Generator Automatic Voltage Regulator

Operation Manual

Kaohsiung : 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 Email : service@mail.kutai.com.tw

Self Excited Automatic Voltage Regulator

5 Amp AVR For General Generators

All manuals and user guides at all-guides.com

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2EA05A

1. INTRODUCTION

Sensing Inpu

Voltage 220 / 380 / 440 VAC, 1 phase2 wire

DIP switch selectable

Frequency 50 / 60 Hz, DIP switch selectable

Power Input

Voltage 100 ~ 300 VAC, 1 phase 2 wire

Output

Voltage Max. 90 VDC @ 240 VAC input

Current Continuous 5A

Intermittent 7A for 10 sec

Resistance Min. 15 ohm Max. 100 ohm

Voltage Regulation

< ± 0.5% ( with 4% engine governing )

Voltage Build-up

Residual voltage at AVR terminal > 5 VAC

Thermal Drift

0.03% per °C change in AVR ambient

External Volts Adjustmen

± 7% with 1K ohm 1 watt trimmer

EMI Suppression

Internal electromagnetic interference filtering

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

3 sec.

Dimensions

101mm L * 69mm W * 47.5mm H

Weight

183g ± 2%

2. WIRING

When generator supply is over load, N phase will be

different with the sharing load by 3 phases (load

imbalance). Hence, the voltage from N phase to 3

phases (R.S.T.) will be altered. When the rated

voltage of the traditional single input’s AVR is above

220V, it will increase the voltage drift rate by using N

phase as the detective input. It will also cause the

voltage imbalance.

EA05A can improve the above situation, and

increase the generator’s rated voltage usage space,

such as 380V, 440V. We can all detect by the

“phase voltage”.

1. When the rated phase voltage of the generator is

220VAC, the input terminals B, C and sensing

terminals A, C can join together (as show as

figure3. It’s the original setting).or connect

independent.(as show as figure2).

2. When the rated phase voltage of the generator is

380V, 440V, the input terminals B, C and sensing

terminals A, C must separate connect the wiring

(as show as Figure 4 or figure 5). The voltage

between B and C must not be over 300 VAC.

3. F+ F- terminals connect to the generator field. (J

and K)

FEXT.VR is the potentiometer (1KΩ1W). These two

terminals must be by-pass when external

potentiometer is needless.

P.S. : A, B, C, F+ F- the usage of wire gauge are

AWG16 or 1.25 mm2 85°C above 600V.

The EXT.VR connection wires must be made of

isolated wiring.

3. ADJUSTMENTS

The voltage setting for 220V/380V/440V and the

frequency setting for 50/60HZ is show in figure7.

Please check the voltage/frequency selector setting

is correct before start the generator.

CAUTION :

THE GENERATOR OR AVR MAY BE DAMAGED

IF THE VOLTAGE / FREQUENCY SELECTOR

SETTING IS INCORRECT.

UFRO DIP:

Close - please refer to solid curre in Figure8.

Open - please refer to dotted curre in Figure8.

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EA05A 3

1. Before you turn on the generator, please turn the

voltage adjustment and stability adjustment full

anti-clockwise. After the generator is on and run

stably, turn the voltage adjustment clockwise to

reach the required out voltage. (If there is an

external potentiometer, turn the external

potentiometer to the middle position before adjust

internal voltage potentiometer.)

2. Adjust “Stability Adjustment” clockwise slowly to

change the feedback time between AVR and the

generator. If the adjustment is too big, it might

cause the voltage instable. If too small, the load

voltage will change too much at heavy load. Our

suggestion is to trace by the multi-meter DCV. To

adjust “stability adjustment”, you just need to

make the multi-meter waving smaller. It can also

improve the full load’s voltage drift rate.

4. 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 repeating steps a. and b. does not result in

generator voltage build-up, and residual is

greater than 5 Vac, replace voltage regulator.

5. TROUBLE SHOOTING

SYMPTOM CAUSE CORRECTION

Engine speed is too low. Please refer to the Generator Manual.

Residual voltage is too low.

Please refer to the section introduction of

excite.

B,C,F+,F- wires are not connected well. Please refer to Figure 2 ~ Figure 5.

Voltage does not

build up

Defective Generator. Please refer to the Generator Manual.

The input wiring of A,B,C are not correct.

Please refer to Figure 2 ~ Figure 5.

Check the external potentiometer. Check wiring and potentiometer.

Under frequency. Please refer to the Generator Manual.

The exciter does not match the AVR. Please refer to the Generator Manual.

Out voltage low

The voltage / frequency selector setting

is not correct.

Please refer to Figure 7.

Fuse blown The exciter flash is too large or wiring

doesn’t connect well.

Please refer to the Generator Manual.

Please refer to Figure 2 ~ Figure 5.

A,C terminals are not connect or wiring

incorrect.

Please refer to Figure 2 ~ Figure 5.

Out voltage high

The voltage / frequency selector setting

is not correct.

Please refer to Figure 7.

Out voltage instable

Stability Adjustment doesn’t adjust well.

Please refer to the section introduction of

Adjustment.

P.S. Please use the fuse of the original plant.

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______________________________________________________________________________________

4EA05A

6. FIGURE AND SIZE

123

1 2

220V/60HZ

220V/50HZ

Field

CB A F+ F-

1 32

U/F STAB VOLT UFRO

DIP

1000 OHM

EXT. VR

Frequency

Selector

Volt /

Field

380V/60HZ

380V/50HZ

STAB

U/F

321

VOLT

321

BF-

F+

31 2

UFRO

DIP

1000 OHM

EXT. VR

Frequency

Selector

Volt /

Field

220V/60HZ

220V/50HZ

21 3

STAB

U/F VOLT

CF-

F+

1 2

UFRO

DIP

1000 OHM

EXT. VR

Frequency

Selector

Volt /

Figure 1 Figure 2

Figure 3 Figure 4

UFRO

DIP

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______________________________________________________________________________________

EA05A 5

2 31

220V/60HZ

21 3

220V/50HZ

380V/50HZ 380V/60HZ

31 2

ON ON

440V/50HZ 440V/60HZ

11 2 32 3

Figure 5

Flash with Battery

Figure 6

Figure 7

Figure 8 Figure 9

GENERATOR OUTPUT VOLTAGE

SOFT START (V/Sec)

FREQUENCY (HZ)

10 20 40

30 50 60 0

60HZ

( % OF MONINAL)

50HZ

120

100

( % OF MONINAL)

120

100

321

Field

440V/60HZ

440V/50HZ

STAB

U/F

VOLT

A F+ F-

UFRO

DIP

1000 OHM

EXT. VR

Frequency

Selector

Volt /

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