Newage MX321 PMG Automatic Voltage Regulators Replacements

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.

Brochure

Manual

Rotating Image

  • All manufacturer names and numbers are used for reference purpose only and do not imply that any part is the product of these manufacturer.

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
Environment
Operating Temperature
-40 to +70 °C
Storage Temperature
-40 to +85 °C
Relative Humidity
Max. 95%
Vibration
3.3Gs @ 100 to 2K Hz
AVR Control Functions
VOLT
Voltage adjustment
STAB
Stability adjustment
U/F
Setting under frequency protection knee point
DROOP
To set the Droop to 5% at PF=0
TRIM
To optimize analogue input sensitivity
EXC
Over excitation trip level set
DIP
Hz related voltage DIP set
DWELL
Hz related recovery time set
I LIMIT
Stator current limit set
OVER V
Over voltage trip level set
RAMP
No load voltage Ramp set time
RMS
Root mean square of generator
Dimension 203.5 (L) x 153.6 (W) x 43.5 (H) mm
Weight 530 g +/-2%

Diagram and Dimensions