EA321

Automatic Voltage Regulator for PMG Generator

EA321 3 Phase Sensing Permanent Magnet Generator type voltage regulator is a compatible replacement for Newage Stamford MX321 and Onan 305-0823.

Dimension
203.5 (L) x 153.6 (W) x 43.5 (H) mm

Weight
530 g +/-2%

Description

Features

Voltage regulation < +/-0.5% RMS

For use in parallel operation

RAMP, DIP, DWELL, DROOP, RMS, U/F, Over Voltage & Over Excitation Adjustment Functions

Over Exc. / Over Volt. & UFRO LED indicators

Current limiting function


Specifications

Sensing Input
Voltage
190 to 264 Vac 3 phase
Frequency
50/60 Hz selectable

Power Input (PMG)
Voltage
170 to 220 Vac 3 phase 3 wire
Current
3A / phase
Frequency
100 to 120 Hz nominal

Output
Voltage
Max. 120 Vdc
Current
Continuous 4A
Intermittent 7A for 60 seconds
Resistance
Min. 15 ohms

Voltage Regulation
< +/-0.5% RMS (with 4% engine governing)

Build Up Voltage
Residual volts at AVR terminal > 5 Vac

External Volts Adjustment
+/-10% with 5 kΩ 1 watt trimmer

Unit Power Dissipation
Max. 18 watts

Thermal Drift
0.05% per °C change in AVR ambient

Soft Start Ramp Time
0.4 to 4 seconds

Analogue Input
Max. Input +/-5 Vdc
Sensitivity 1V for 5% generator volts
Input Resistance 1 kΩ

Droop Input
Burden 10 ohms
Max. Sensitivity
0.22A for 5% droop (PF=0)
Max. Input 0.33A

Under Frequency Protection (Factory Setting)
Set Point 95% Hz
Slope 100% to 300% down to 30 Hz
Max. Dwell 20% volts/seconds recovery

Current Limit Input
Burden 10 ohms
Sensitivity Range 0.5A to 1A

Over Voltage Detector Input
Set Point 300V
Time Delay 1 second (fixed)
CB Trip Coil Volts 10 to 30 Vdc / 0.5 Amp

Over Excitation Protection
Set Point 120 Vdc
Time Delay 8 to 15 seconds