AVR R448 For Leroy Somer Alternators

R448 Automatic Voltage Regulator
R448 Automatic Voltage Regulator
of a sealed electronic devices, by adjusting the excitation current in order to stabilize the output voltage of the brushless generator. Generator output voltage is adjusted  by using the voltage adjustment potentiometer on the AVR. cutting excitation current is accomplished by swiching off the supply power to AVR. When applying a step load to the generator, the rotational speed(frequency) of the genset  drops. if the speed is below the preset frequency, the LAM circuits drops the voltage about 25%,as long as the speed has not recovered to normal values. The LAM is used either to reduce the speed drop of the engine, during the step load, or to increase the applicable step load for the same speed variation so the engine can recover normal speed quickly.
Voltage sensing 5va insulated transformer with input voltage taps at
110vterminals 0-110v =85-130v
220vterminals0-220v =170-260v
Load current 7A
overload current 15A-10s

 R448 Automatic Voltage Regulator Product Detail:

Place Of Origin Taizhou,China
Brand Name YAMADA
Brand Leroy Somer
Model Number R448
Type Brushless
Phase 3
Self excited Yes
Alternator Power 10KW-300KW
AVR Can Material PP,ABS,ROHS
Package 50pcs per carton
Individual box Packing Yes, We could print customer’s logo
Produce Ability 3000pieces per day
Certification CE,ROHS
Minimum Order Quantity 2PCS
Delivery Time 5-25days
Payment Term Wire Transfer(TT),Western Union, Paypal, LC at sight
Samples Charge
Samples Ship Cost Customer pay, If you have courier No.(UPS,DHL,TNT),Please send it to us.
Loading Port Ningbo ,Shanghai, Guangzhou
Harmonized System Code(HS) 8503009090
OEM Manufacture Service Yes

R448 Automatic Voltage RegulatorTechnical specification


Input voltage: 70-140V AC, (PMG, or auxiliary winding, single, three phases)

 Reaction is measured : 90-480V AC

MAX. output:DC 10A 125V

Function: Built-in low-speed , over excitation LAM,


We also provide design service for customers’ demands.