ADVR-250

Automatic Voltage Regulator (AVR) compatible with Leroy Somer R250

With two-line sensing, ADVR-250 is a hybrid analog-digital AVR for self-excited (shunt) generators. It’s compatible with Leroy Somer* R250 and can also replace R230. The innovative heat sink design significantly improves the heat radiation efficiency.

Comparison Table
  • 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 +/-1%
  • Under frequency protection
  • Over excitation shut down
  • EMI suppression
  • Adjustable voltage and stability
  • Built-in high breaking capacity fuse

Specifications
Sensing Input
  • Voltage120 (90 to 139) / 240 (190 to 277) Vac 1 phase 2 wire
  • Frequency 50/60 Hz selectable
Power Input
  • Voltage 95 to 139 Vac +/-10% 1 phase 2 wire
Output
  • Voltage Max. 63 Vdc @ Power Input 110 Vac
  • Current Continuous 4A Intermittent 7A for 60 seconds / 9A for 10 seconds
  • Resistance Min. 15 ohms Max. 100 ohms
Voltage Regulation
  • Less than +/-1% (with 4% engine governing)
Build Up Voltage
  • Residual volts at AVR terminal greater than 5 Vac
External Voltage Adjustment
  • +/-15% with 10K ohms 1 watt potentiometer
Static Power Dissipation
  • Max. 15 watts
EMI Suppression
  • Internal electromagnetic interference filtering
Voltage Thermal Drift
  • 0.05% per °C change in AVR ambient
Under Frequency Protection
  • Knee point adjustable range 45 to 55 Hz
Over Excitation Shutdown
  • Field volts shut down after time delay if exciter field volts exceeds 95 Vdc +/-5%

AVR Control Functions
VOLT
  • Voltage adjustment
STAB
  • Stability adjustment
U/F
  • Setting under frequency protection knee point

Environment
Operating Temperature
  • -40 to +60 °C
Storage Temperature
  • -40 to +85 °C
Relative Humidity
  • Max. 95%
Vibration
  • 1.5 Gs @ 5 to 30 Hz
  • 5.0 Gs @ 30 to 500 Hz

Physical Specifications
Dimensions
  • 140.0 (L) x 125.0 (W) x 48.0 (H) mm
Weight
  • 280 g +/-2%
Shock
  • Withstands up to 20G in each X, Y, Z axes
Weight 0.3 kg
Dimensions 14 × 18.1 × 4.6 cm

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