ETC EA07 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

EA07

Generator Automatic Voltage Regulator

Operation Manual

Suitable for Single or Three Phase Self Excited Brushless Generator

Compatible replacement for Mecc Alte SR-7

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

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

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2 EA07

SECTION 1 : SUMMARY

EA07 is a self excited Analogue type Automatic
Voltage Regulator. The sensing and power inputs are
independent and accept power input from the auxiliary
winding. The wide voltage adjustment range fulfills any
voltage adjustment requirements.

The EA07 is equipped with adjustable under frequency
protection and adjustable over excitation voltage
protection for preventing generator from over loading
or over excitation.

Both protections status are indicated by two individual
LED when protection is activated. Also the AVR has a
built in EMI filter to prevent interference to the generator.

SECTION 2 : SPECIFICATION

Sensing Input (4A, 5)

Static Power Dissipation

Voltage 90  350 Vac, 1 phase

Max.5 watts

Frequency 50/60 Hz

Under Frequency Protection

Power Input (3A, 5C)

Adjustable range 42  60 Hz

Voltage 80  270 Vac, 1 phase

Frequency 50/60 Hz

Over Excitation Protection

40  Max. Vdc @ 0.3  20 secs.

Excitation Output (F+, F-)

Voltage Max. 63 Vdc @power input 220 Vac

Voltage Thermal Drift

Current Continuous 6A

Less than 3% at temperature range -40 to +70 ˚C

Intermittent 7A for 10 secs.

Resistance 10  100 ohms

Environment

Fuse Spec. Slow blow 5 x 20mm S505-6.3A / 250V

Operating Temperature -40 to +65 ˚C

Storage Temperature -40 to +80 ˚C

External Voltage Adjustment

Relative Humidity Max. 95%

Max. +/- 7% @ 100K ohms 1/2 watt potentiometer

Vibration 1.5 Gs @ 5 – 30 Hz

5.0 Gs @ 30 – 500 Hz

Voltage Regulation

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

Dimensions

97.8 (L) x 92.0 (W) x 38.0 (H) mm

Build Up Voltage

5 Vac 25 Hz residual volts at power input terminal

Weight

275 g +/- 2%

EMI Suppression

Internal electromagnetic interference filtering

ATTENTION

1. AVR can be mounted directly on the engine,
genset, switchgear, control panel, or any
position that will not affects operation. For
dimension reference, please see Figure 1.

2. All voltage readings are to be taken with an
average-reading voltmeter Meggers and
high-potential test equipment must not be used.
Use of such equipment could damage the AVR.

3. Secure all wiring connection. Do not install AVR
at a place with high vibrations to prevent loose
connections. For safety do not touch the heat
sink while in operation.

4. 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.

Outline and Drilling Diagram

Figure 1

81.8

92.0

97.8

15.3

38.0

5.2