EA448B

Automatic Voltage Regulator 160Vdc 10Amp

EA448B PMG or A.R.E.P or Auxiliary Winding type generator voltage regulator, it’s applicable in used with R726 Three Phase Sensing Module. EA448B is a compatible replacement for Leroy Somer R448, R449, R450, R438, and AEM110RE016 and also Olympian FG Wilson 922 124.
* It can be used with EPMG-1270 / EPMG-2470 to increase motor starting capacity.
  • All manufacturer names and numbers are used for reference purpose only and do not imply that any part is the product of these manufacturer.
  • Voltage regulation less than +/-0.5%
  • Load acceptance module (LAM)
  • 50/60 Hz selectable
  • Under frequency & Exc. max protection
  • Soft start voltage ramping
  • Normal rapid response time (Option)
  • Applicable for PMG or A.R.E.P or Auxiliary Winding
  • Apply with KUTAI EPMG-1270 / EPMG-2470 to exceeds normal generator motor starting capabilities

Specifications
Sensing Input
(Average Reading)
  • Voltage 95 to 520 Vac 1 phase 2 wire (DIP Switch Settings)
  • 110 Vac Adjustment Range 95 – 140 Vac
  • 220 Vac Adjustment Range 170 – 260 Vac
  • 380 Vac Adjustment Range 340 – 520 Vac
  • Frequency 50/60 Hz (Jumper selected)
Power Input
  • Voltage 40 to 150 Vac 1 phase 2 wire
  • Frequency 40 to 500 Hz
Auxiliary Input
  • Voltage 40 to 150 Vac 1 phase 2 wire
  • Frequency 40 to 500 Hz
External Volts Adjustment
  • Max. +/-10% @ 1KΩ 1 watt potentiometer
Quadrature Droop Input
  • Sensitivity +/- 7%@ PF +/- 0.7 (STAT. Adjustable)
Build Up Voltage
  • 5 Vac 25Hz residual volts at power input terminal
Excitation Output
  • Continuous 110 Vdc 7A @ power input 120 Vac
  • Max. 160 Vdc 10A for 10 Sec.
  • Resistance Min. 15Ω, Max. 100Ω @120V
  • Fuse Spec. Slow blow 5 x 20mm 10A
Voltage Regulation
  • Less than +/- 0.5% (with 4% engine governing)
Soft Start Ramp Time
  • 3 seconds +/- 10%
Typical System Response
  • 0.3 to 1 second @ +/-20% voltage vibration
Static Power Dissipation
  • Max. 4 watts
Under Frequency Protection
  • 50 Hz system knee point at 45Hz
  • 60 Hz system knee point at 55Hz
Over Excitation Current limitation
  • 3.5A to 10A (EXC.MAX. Adjustable)
Voltage Thermal Drift
  • Less than 3% from -40 to +70 °C

AVR Control Functions
VOLT
  • Voltage adjustment
STAB
  • Stability adjustment
V/HZ
  • Under Frequency Adjustment
EXC.MAX
  • Over Excitation Current Limiting
STAT
  • Quadrature Droop Adjustment

Environment
Operating Temperature
  • -40 to +70 °C
Storage Temperature
  • -40 to +85 °C
Relative Humidity
  • Max. 95%
Vibration
  • 5.5 Gs @ 60 Hz

Physical Specifications
Dimensions
  • 203.0 (L) x 153.0 (W) x 60.5 (H) mm
  • 7.99 (L) x 6.03 (W) x 2.38 (H) inch
Weight
  • 850 g +/-2%
  • 1.874 lb +/- 2%
Weight 0.85 kg
Dimensions 20.3 × 15.3 × 6.05 cm

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