Kutai electronics EA45A220 Series Manuale utente

KUTAI ELECTRONICS INDUSTRY CO., LTD.

TEL : +886-7-8121771 FAX : +886-7-8121775 Website : www.kutai.com.tw

Headquarters : No.3, Ln. 201, Qianfu St., Qianzhen Dist., Kaohsiung City 80664, Taiwan

EA45A220

Generator Automatic Voltage Regulator

Operation Manual

Self Excited Automatic Voltage Regulator

45 Amp AVR for Carbon Brush Type Generators

EA45A220HL (Half Wave) / EA45A220FL (Full Wave)

*Parallel version is available for option

___________________________________________________________________________________________

2EA45A220

SECTION 1 : SPECIFICATION

Sensing & power Input

Under FrequencyProtection(FactoryKneePoint Setting)

Voltage 170 –265 Vac, 1 phase 2 wire

50 Hz system presets knee point at 45 Hz

Frequency 50 / 60 Hz selectable

60 Hz system presets knee point at 55 Hz

Output (at 220 Vac input)

Environment

Voltage EA45A220HL(Half-wave) Max.90 Vdc

Operation Temperature -40 +60 ˚C

EA45A220FL(Full-wave) Max.180 Vdc

Storage Temperature -40 +85 ˚C

Current Continuous 45A

Relative Humidity Max. 95%

Intermittent 60A for 10 sec.

Vibration 3 Gs @ 100 2K Hz

Resistance EA45A220HL Min. 1.4 ohms

EA45A220FL Min. 2.7 ohms

Cooling condition

Forced with 120.0 (L) x 120.0 (W) x 38.0 (H) mm fan

Voltage Regulation

< +/- 1% ( with 4% engine governing )

Dimensions

330.0 (L) x 189.0 (W) x 180.0 (H) mm

Build Up Voltage

Residual voltage at AVR terminal > 5 Vac @ 25 Hz

Weight

EA45A220HL 4.5 kgs +/- 2%

External Volts Adjustment

EA45A220FL 5.2 kgs +/- 2%

+/- 6%

189.0

330.0

180.0

160.0

169.0

Unit : mm

150.0

SECTION 2 : ADJUSTMENT

POWER LAMP

Lights up when AVR is powered.

VOLT Voltage Adjustment

Generator output voltage adjustment.

AUTOMATIC

VOLTAGE REGULATOR

U/F LAMP

POWER LAMP

F S +HI LO

STAB. VOLT. U/F

STAB Stability Adjustment

Correct stability adjustment must be

conducted while the generator is operating

without load. First adjust this STAB (POT)

anti-clockwise until the voltage becomes

unstable, and then slightly adjust it clockwise

(about 1/5 turn). When the voltage just

reaches the critical point (knee point) of

stabilization, where the voltage is stable yet

very close to becoming unstable.

U/F LAMP

Lights up when the generator is in U/F (Under

Frequency Protection)

Select frequency 50 or 60Hz according to the

generator in use(refer to section 4)

U/F Under Frequency

Protection Adjustment When generator speed

falls below the knee point, the under frequency

protection circuit will activate and the voltage

begin to decrease in linear descend.

Adjustment

Figure 2

Outline Drawing

Figure 1

___________________________________________________________________________________________

EA45A220 3

Figure 5

Figure 3

Figure 6 Manual Field Flash

SECTION 3 : WIRING CONNECTION

Field

BATT.FIELDPOWER

EA45A220

220VAC

F-

F+ B+ B-

SECTION 4 : FREQUENCY SELECTION

AND KNEE POINT ADJUSTMENT

4.1 Frequency Selection

Detach the controller from enclosure(refer to Figure 4)

and select the system frequency on the back of the

controller(refer to Figure 5).

EA45AF PCB

Black

Magenta

Yellow

Red

Close : 60Hz

HZHZ

Open : 50Hz

Pink

Blue

White

EXT. VR

1K Ohm

close :enable Low frequency protection

open :disable Low frequency protection

(Reverse Side)

4.2 Knee Point Adjustment

4.2.1 Turn the U/F POT fully clockwise.

4.2.2 Adjust VOLT POT to nominal level and speed

down the engine to knee point.

4.2.3 Turn the U/F POT counter-clockwise until the

voltage starts to decrease (U/F lamp illuminates),

re-adjust engine speed to rated speed.

SECTION 5 : FIELD FLASHING

When the regulator is installed correctly but the

generator is failed to generate power. Besides carbon

brushes were worn out, here are two possible causes

below.

5.1 The polarity of field is inverse

Solution：Exchange the connection of F+ and F-.

5.2 The residual voltage is less than 5 Vac,

Solution 1：

5.2.1 Shut down generator, disconnect the wiring

between AVR and generator then flash the field.

Flashing duration = 3 seconds. (See wiring in

Figure 6)

Resistor 3 –5 ohms for full wave AVR

Resistor 5 –10 ohms for half wave AVR

Warning!! Over field flashing may damage

the field winding of generator.

5.2.2 Restart generator and measure the residual

voltage by AC Voltmeter, if it is still less than 5

Vac, repeat the previous process, after several

times, the residual voltage still cannot be built,

Kutai EB500 is strongly recommended, see

Figure 6.

Field

SWR

F+F-

BATT.

Figure 4

Fig. 6

___________________________________________________________________________________________

4EA45A220

Solution 2 : Install Kutai automatic flash module

EB500

Field

BATT.FIELDPOWER

EA45A220

220VAC F-

F+ B+ B-

EB500

F-F+ B+

B-

ACC1 ACC2

fuel switch(N.O.)

BATT.

Oll pressure or

WARNING

This Automatic Voltage Regulator is not

equipped with loss-Sensing Protection function /

Over Excitation Protection. An additional

Over-Voltage Protection device for load may be

required to avoid possible damage to the

equipment or severe personal injury or death.

ATTENTION

1. AVR installation should only be performed by

a qualified technician.

2. Install AVR inside the generator control panel

to avoid high temperature, moisture, and

location where AVR cannot be easily reached.

3. AVR heat sink may reach a high temperature

(above 60 ˚C) when AVR is powered, do not

touch or ground AVR heat sink.

4. 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.

SECTION 6 : TROUBLE SHOOTING

SYMPTOM

POSSIBLE CAUSES

SOLUTIONS

Voltage does not

build up

Residual voltage below 5 Vac

Field flash is required

Incorrect wiring

Check wiring diagram for proper connection

Engine under speed

Increase engine speed to above 25 Hz

Carbon brushes were worn out

Replace with new carbon brushes

Low output voltage

Voltage set point is not properly adjusted

Adjust VOLT POT clockwise to reach

desired voltage

External voltage adjusted too low

Turn the external VR to reach desired

voltage

Under Frequency Protection is activated

Refer to Section 4 Frequency selection and

knee point adjustment

Over output voltage

Voltage set point is not properly adjusted

Adjust VOLT POT anti-clockwise to reach

rated voltage

Output voltage

unstable (Hunting)

Stability range is not set properly

Refer to Section 2 Adjustment

Field voltage or field resistance is too low

Connect suitable resistor in series to

increase total resistance

※Appearance and specifications of products are subject to change for improvement without prior notice.

Figure 7

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