Kutai electronics EA341 Operation Manual

KUTAI ELECTRONICS INDUSTRY CO., LTD.

TEL : [phone] FAX : [phone] Website : www.kutai.com.tw
Headquarters : No.3, Ln. 201, Qianfu St., Qianzhen Dist., Kaohsiung City 80664, Taiwan

Self Excited Automatic Voltage Regulator

Compatible with Newage MX341*

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

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

EA341

Generator Automatic Voltage Regulator

Operation Manual

Sensing Input

Quadrature Droop Input

Voltage 190  264 Vac Max, 1 phase 2 wire

Burden 10 ohms

Frequency 50/60 Hz, selectable

Max. input 0.33 A

Max. sensitivity 0.07 A for 5% droop (PF = 0)

Power Input (PMG)

Voltage 170  220 Vac Max, 3 phase 3 wire

Over Voltage Detector Input

Current 3A / Phase

Set point 300V. Time delay 1 sec (fixed)

Frequency 100  120 Hz, nominal

CB trip coil volt 10  30 Vdc / 0.5 Amp

CB trip coil resistance 20  60 ohms

Excitation Output

Voltage Max. 120 Vdc @ power input 220 Vac

Current Limit Input

Current Continuous 2.7A

Burden 10 ohms

Intermittent 6A for 10 secs.

Sensitivity range 0.5  1A

Resistance Min. 15 ohm

Under Frequency Protection (Factory Presets)

External Voltage Adjustment

Set point 95% Hz

Max. +/- 10% @ 1K ohm 1 watt potentiometer

Slope 170% down to 30 Hz

Voltage Regulation

Over Excitation Protection

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

Set point 90 Vdc

Time delay 10 secs. (fixed)

Build Up Voltage

5 Vac residual volts at power input terminal

Voltage Thermal Drift

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

Soft Start Ramp Time

2 seconds +/- 10%

Environment

Operating Temperature -40 to +70 ˚C

Static Power Dissipation

Storage Temperature -40 to +85 ˚C

Max.12 watts

Relative Humidity Max. 95%

Vibration 3.3 Gs @ 100  2K Hz

Analogue Voltage Input

Input Resistance 1K ohm

Dimensions

Max. Input +/- 5 Vdc

150.0 (L) x 135.0 (W) x 48.0 (H) mm

Sensitivity 1V for 5% generator volt

Weight

394 g +/- 2%

SECTION 1 : SPECIFICATION

SECTION 2 : GENERAL DESCRIPTION

2.1 EA341 is a two phase sensed Automatic Voltage
Regulator and forms part of the excitation system
for a brush-less generator. Excitation power is
derived from a three-phase permanent magnet
generator (PMG), to isolate the AVR control
circuits from the effects of nonlinear loads and to
reduce radio frequency interference on the
generator terminals. Sustained generator short
circuit current is another feature of the PMG
system.

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2 EA341

2.2 The AVR senses the voltage in the main
generator winding and controls the power fed to
the exciter stator and hence the main rotor to
maintain the generator output voltage within the
specified limits, compensating for load, speed,
temperature and power factor of the generator.

2.3 Soft start circuitry is included to provide a smooth
controlled build up of generator output voltage.