Kutai electronics EA448B 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 806037, Taiwan

EA448B

Generator Automatic Voltage Regulator

Operation Manual

Permanent Magnet Generator or A.R.E.P or Auxiliary Winding Type

Compatible with Leroy Somer R448*

Use with KUTAI EPMG-1270 / EPMG-2470 add-on module can boost

generator motor starting capacity

* Use for reference purpose only and not a genuine Leroy Somer product.

___________________________________________________________________________________________

2EA448B

NOTICE

1. AVR could be installed in any suitable

locations of the generator sets, the

appearance and fixing holes are as (Figure

2. To ensure safety and avoid the permanent

damage to the AVR caused by the high

pressure, make sure remove the connection

wiring on the AVR before using

megohmmeter and the voltage meter.

3. Make sure tie up the connection wiring of the

AVR when installing in a high-vibration

environment. The cooling fin could release

the high temperature under the normal

operation, please do not touch.

SECTION 1: SPECIFICATION

Sensing Input (E1、E2) Average Reading

Voltage Regulation

Voltage 95 520 Vac 1 phase 2 wire

Less than +/- 0.5% ( with 4% engine governing )

DIP Switch Settings

Adjustment 95 140 Vac @ 110 Vac

Typical System Response

170 260 Vac @ 220 Vac

0.3 1 seconds @ +/- 20% Voltage Vibration

340 520 Vac @ 380 Vac

Frequency 50/60 Hz Jumper selected

Static Power Dissipation

Max. 4 watts

Power Input (X1、X2)

Voltage 40 150 Vac 1 phase 2 wire

Under Frequency Protection

Frequency 40 500 Hz

50 Hz system knee point at 45Hz

60 Hz systems knee point at 55Hz

Auxiliary Input (Z1、Z2)

Voltage 40 150 Vac 1 phase 2 wire

Over Excitation Current limitation

Frequency 40 500 Hz

3.5A to 10A (EXC.MAX. Adjustable)

Excitation Output (E+、E-)

Voltage Thermal Drift

120V 1 phase Continuous 110 Vdc 7A

Less than 3% from -40 to +70 °C

Max. 160 Vdc 10A 10Sec

Resistance Min. 15Ω, Max. 100Ω@120V

Environment

Fuse Spec. Slow blow 5 x 20mm 10A

Operation Temperature -40 to +70 ˚C

Storage Temperature -40 to +85 ˚C

External Voltage Adjustment (1KΩ)

Relative Humidity Max. 95%

Max. +/- 10% @ 1 KΩ 1 watt potentiometer

Vibration 5.5 Gs @ 60 Hz

Quadrature Droop Input (S1、S2)

Dimensions

CT N:1A

203.0 (L) x 153.0 (W) x 60.5 (H) mm

Sensitivity +/- 7%@ PF +/- 0.7 (STAT. Adjustable)

7.99 (L) x 6.03 (W) x 2.38 (H) inch

Build Up Voltage

Weight

5 Vac 25Hz residual volts at power input terminal

850 g +/- 2%

1.874 lb +/- 2%

Soft Start Ramp Time

3 seconds +/- 10%

SECTION 2: DEMISION

[5.51"]

140.0

[2.95"]

75.0

115.0

[4.53"] 100.0

[3.94"] [7.87"]

200.0

[2.36"]

60.0

Unit : mm

[0.71"]

18.0

[inch]

M5 L30

Figure 1. Outline Drawing

___________________________________________________________________________________________

EA448B 3

SECTION 3: DIP SWITCH SETTING

4050 (50)(60)

S F

1 2 3 J2

X1、X2：Power Input

Connect working voltage, Max. 150Vac

Z1、Z2：Auxiliary Power Input

Connect Auxiliary voltage, Max. 150Vac

50Hz、60Hz：Frequency Selection

E+、E-：Excitation Output

Connect to generator excitation field

E1、E2：Sensing Input

Connect sensing input voltage Max. 600Vac

Sensing Input Voltage Selection

1 OFF 2 OFF ：110Vac (95~140V)

1 ON 2 OFF ：220Vac (170~260V)

1 ON 2 ON ：380Vac (340~520V)

S1、S2：Quadrature Droop Input

Connect to generator CT

1KΩ：External Voltage Adjustment

Connect to external 1KΩ potentiometer

Terminals must be shorted when not in used

3Ph.：Three Phase Sensing Input

Connect to Three Phase Sensing

Module

EXC.MAX.：Over Excitation Current Limiting

Excitation output will be turn off when excitation

current is over the setting value

Min. 3.5A, Max. 10A

V/Hz：Under Frequency Adjustment

Adjustment for Under frequency and LAM

knee point

STAB.：Stability Adjustment

Under no-load operation, slowly adjust the

STAB VR counterclockwise until the

voltage is unstable, and then adjust it

clockwise for about 1/5 circle

VOLT：Voltage Adjustment

Adjust Generator output voltage

Adjustment range can be set by DIP SW

STAT.：Quadrature Droop Adjustment

Adjust the ratio of the idle power to the

voltage drop, when used in parallel.

Adjustment range is 0% to 7%

J1 Connected：With LAM protection

LAM：When Generator is loading the Engine speed will be

reduced. When engine speed is lower than pre-set frequency

threshold (V/Hz knee point), AVR will reduce voltage in 13%

or 25% (set by J2). This will make the active power of loading

reduce 25% to 45%, until engine speed reach pre-set value

once again then voltage will resume to normal value.

J1 Disconnected：Without LAM protection

When J2 1–2 is shorted：Drop ratio 13% in LAM voltage

When J2 2–3 is shorted：Drop ratio 25% in LAM voltage

LED：LED will illuminate when AVR in normal operation

ST6

ST1

ST2

VOLT

STAB.

V/Hz

EXC.MAX.J1

ST7

1 2 3

STAT.

E+

E-

50Hz 60Hz

LED

EA448B

ST1：Single Phase / Three Phase Sensing Selection

Shorted：Single phase sensing

Open：Three phase sensing (must use with Three Phase Sensing Module)

ST2：Response Time Selection

Shorted：Slow

Open：Fast

Select response time according to Stability adjustment

ST6：Instantaneous Compensation for Voltage

Shorted：For Generator less than 600 KVA

Open：For Generator greater than 600 KVA

ST7：Keep shorted

___________________________________________________________________________________________

4EA448B

SECTION 4ː CONNECTION DIAGRAMS

X2 Z1 X1 Z2 E+ E- E1 E2

T1 T7 T2 T8 T3 T9

T4 T10 T5 T11 T6 T12

FIELD

60Hz

50Hz

3Ph.

STATOR : 12 wires (marked T1 to T12)

potentiometer

1k /1W

External

EA448B

T1 T7 T2 T8 T3 T9

T4 T10 T5 T11 T6 T12

AUX WINDINGSFIELD STATOR : 12 wires (marked T1 to T12)

X2 Z1 X1 Z2 E+ E- E1 E2

60Hz

50Hz

3Ph.

potentiometer

1k /1W

External

EA448B

Figure 2. Self-Excited (SHUNT)

Figure 3. Auxiliary and Harmonic Power Winding

T1 T7 T2 T8 T3 T9

T4 T10 T5 T11 T6 T12

FIELD STATOR : 12 wires (marked T1 to T12)

PMG

X2 Z1 X1 Z2 E+ E- E1 E2

60Hz

50Hz

3Ph.

potentiometer

1k /1W

External

EA448B

Figure 4. PMG Winding

ATTENTION!!

1. Improper setting of under-frequency protection could cause the output voltage of the unit to drop or become

unstable under with changes in load. Avoid making any changes to the U/F setting unless necessary.

2. Terminal Specification：6.35mm (1/4 inch) Flagged Terminals

3. Use only replacement fuses specified in this user manual.

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

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