ETC EA5K3 Operation Manual

KUTAI ELECTRONICS INDUSTRY CO., LTD.

TEL : [phone] FAX : [phone] Website : www.kutai.com.tw
Headquarters : No.3, Lane 201, Chien Fu St., Chyan Jenn Dist., Kaohsiung 80664, TAIWAN

EA5K3

Generator Automatic Voltage Regulator

Operation Manual

Self Excited Slip Ring Type Automatic Voltage Regulator

with closed-loop feedback circuit

Designed For Small Diesel and Gasoline Generators

* All manufacturer names and numbers are used for reference purpose only

and do not imply that any part is the product of these manufacturer.

___________________________________________________________________________________________

2 EA5K3

SECTION 1 : SPECIFICATION

Sensing Input

Voltage Adjust Range

Voltage 16 – 25 Vac

115/230 Vac +/- 15%

Frequency 50/60 Hz

Voltage Thermal Drift

Power Input

Less than 5% at temperature range -40 to +70 ˚C

Voltage 60  100 Vac

Frequency 50/60 Hz

Environment

Operating Temperature -20 to +65 ˚C

Excitation Output

Storage Temperature -40 to +85 ˚C

Voltage Max. 100 Vdc @ power input 85 Vac

Relative Humidity Max. 90%

Current Continuous 3A

Vibration 1.5 Gs @ 5 – 30 Hz

Intermittent 5A for 60 secs.

5.0 Gs @ 30 – 500 Hz

Resistance Min. 25 ohms

Dimensions

Voltage Regulation

64.5 (L) x 158.2 (W) x 40.0 (H) mm

Less than +/- 1% ( with 4% engine governing )

Weight

Build Up Voltage

190 g +/- 2%

2 Vac residual volts at power input terminal

SECTION 2 : SUMMARY

The EA5K3 automatic voltage regulator is a direct
replacement for small brush type generators from 3 to

7.5 KW. This AVR employs an enhanced closed-loop
feedback circuit, which greatly improves voltage
stability, also added is a new VOLT adjustment pot, not
available in the original. This new AVR significantly
improves generator performance.

SECTION 3 : WIRING & ADJUSTMENT

3.1 Figure 1, show the plug connections numbered 1,
2, 3 and 4.

3.2 Line 1 (white) and Line 2 (green) are the sensing
input lines, they are used to match the generator
output voltage (115 / 230 Vac) Some generators
have an independent sensing connections, If this
is your case, open wire 2 (green) and reconnect
to its matching connector plug.

3.3 Line 3 (blue) and Line 4 (blue) are the AVR
Power Input terminals.

3.4 The independent red (+ Positive) and white wire
(  Negative) ending in spade terminals attach to
the generators slip rings (F+ and F).

3.5 Moving the voltage adjustment potentiometer
(VOLT) located on the back and center of the
AVR changes the output voltage +/- 15%; moving
it clockwise increases voltage and moving it
counter-clockwise decreases voltage.

WARNING

Overly field flashing may damage the AVR or
generator excitation winding.

Please 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.

1
2

3
4

MODEL: EA5K3

Stator

Aux.

Winding

Field

Winding

115VN115V

Figure 1 Connection