EA480

Analog, single-phase sensing. Excitation output 5Amp with half-wave rectifier for use with self-excited, brushless generators

EA480 is a direct replacement for Newage Stamford AS480. It’s equipped with Over Excitation Protection, Soft Start Voltage Ramping Function, EMI suppression and Under Frequency Protection.
  • All manufacturer names and numbers are used for reference purpose only and do not imply that any part is the product of these manufacturer.
  • Rated frequency 50/60 Hz
  • Under frequency protection and soft start voltage ramping
  • EMI suppression
  • Voltage regulation less than +/-0.5%
  • Over excitation protection
  • Quadrature Droop Input for parallel operation
  • Supports connection with Stamford Excitation Boost System (EBS)

Specifications
Sensing / Power Input
(Average Reading)
  • Voltage 60 to 300 Vac 1 phase 2 wire
  • Frequency 50/60 Hz (Jumper Selected)
Excitation Output
  • 110V 1 phase Continuous 31 Vdc 5A Max. 45 Vdc 7.5A for 10 seconds
  • 220V 1 phase Continuous 63 Vdc 5A Max. 90 Vdc 7.5A for 10 seconds
  • Note: If AVR is mounted externally to alternator continuous current should be reduced by 20%
  • Resistance Min. 6 ohms Max. 100 ohms @ 110V / Min. 13 ohms Max. 100 ohms @ 220V
Build Up Voltage
  • 4Vac 25Hz residual volts at power input terminal
External Voltage Adjustment
  • Max. +/-10% @ 1K ohm 1 watt potentiometer
  • Use 7.5K ohms resistor to enable 110Vac sensing
Voltage Regulation
  • Less than +/-0.5% (with 4% engine governing)
Typical System Response
  • Less than 20 milliseconds
Static Power Dissipation
  • Max. 4 watts
Quadrature Droop Input
  • Input resistance 10 ohms
  • Sensitivity 0.07A for 5% voltage drop (PF=0)
  • Max. input 0.33A
Over Excitation Protection
  • Excitation Voltage 70 Vdc +/-10%
  • Time delay 10 to 15 seconds
Voltage Thermal Drift
  • Less than 3% at temperature range -40 to +70 °C

Accessories
Jumper Terminals
  • x1
M5L35 Screw
  • x2
Adjustment Tool
  • x1

Environment
Operating Temperature
  • -40 to +60 °C
Storage Temperature
  • -40 to +85 °C
Relative Humidity
  • Max. 95%
Vibration
  • 5.5 Gs @ 60 Hz

Physical Specifications
Dimensions
  • 130.0 (L) x 90.0 (W) x 39.0 (H) mm
  • 5.12 (L) x 3.54 (W) x 1.54 (H) inch
Weight
  • 260 g +/-2%
  • 0.573 lb +/-2%
Weight 0.26 kg
Dimensions 13 × 9 × 3.9 cm

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