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avr R448 automatic voltage regulator

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AVR R448

Voltage Regulation < ±0.5%

Load Acceptance Module (LAM)

50/60 Hz Selectable

Under Frequency & Exc. Max Protection

Single Phase Or Three Phase Voltage Sensing Optional

Soft Start Voltage Ramping

Normal Rapid Response Time (Option)


Sensing Input Terminal 0-110V = 95~140V
Terminal 0-220V = 170~260V
Terminal 0-380V = 340~520V
Frequency 50/60 Hz selectable
Power Input Voltage 40~150 VAC 3 phase
Output Current Max. 10A
Current Droop Max. 4% @ P.F.=0.8
Voltage Regulation < ±0.5% (with 4% engine governing)
Voltage Build-up Residual volts at AVR terminal > 5 VAC
Voltage Output Max. 160 VDC @ 120 VAC
External Voltage Adjustment ±10% @ 1 K Ohm 1 watt trimmer
Auxiliary Winding 6~150 VAC (No load rms)
Response Time 0.3~1 sec. @ ±20% voltage vibration
LAM Voltage Droop Rate 10% & 15% selectable
Environment Operating Temperature : -40~60 °C
Storage Temperature : -40~85 °C
Relative Humidity : Maximum 95%
Vibration : 1.5G @ 5~30 Hz / 5.0G @ 30~500 Hz
AVR Controls Functions VOLT : Voltage Adjustment
STAB : Stability Adjustment
V/HZ : UFRO Knee Point Set
EXC.MAX : Excitation Current Limit
STAT : Droop Adjustment
Dimensions 203.0 (L) x 153.0 (W) x 60.5 (H) mm

970g ±2%


Shipping CompanyShipping CostEstimated Delivery Time
DHL3 - 7 days
UPS Expedited3 - 7 days
EMS5 - 14 days
Post Air MailFree Shipping15 - 45 days
Return PolicyIf the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.

N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller ServiceOn-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).