Automatic Voltage Stabilizer AVR R448 For Diesel Generator

Product Details
Serial Number R448
Country of Origin Fujian China
Certificate ISO, CE
Payment & Shipping Terms
Minimum Order 1pcs
Average Delivery Time 1days
Payment Method TT, western union
Ability to Supply 20000pcs per month

Automatic Voltage Stabilizer AVR R448 For Diesel Generator


The circuitry of the R448 Automatic Voltage Regulator (AVR) provides closed-loop control of the alternator output voltage by regulating the exciter field current. The primary winding has a voltage in ratio to that of the alternator (characteristic shunt), the next has a voltage in proportion to the stator current (compound characteristic: booster effect). Which is powered by two auxiliary windings which are independent of the voltage equal circuit The power supply voltage is rectified and filtered before being used by the AVR monitoring transistor. With PMG excitation, a permanent magnet generator (PMG) added to the alternator supplies the AVR with a voltage that is free of the main alternator winding. This is built-in at the rear of the machine and connected to the R448 AVR, and the ST9 jumper must be disconnected.

*Quadrature droop adjustment

*AVR Voltage adjustment

*Stability adjustment

*LAM Threshold adjustment

*Excitation ceiling adjustment

*Selection of single-phase or three-phase

*voltage sensing

*Selection of normal or rapid response time

*50 Hz or 60 Hz frequency option

*Remote voltage adjustment option

*LAM enable/disable option

*Alternator frame selection

*Excitation system selection


Input voltage: 70-140V AC, (PMG, or auxiliary 
winding, single, three phases)
The reaction is measured: 90-480V AC
MAX. output :DC 10A 125V
Function: Built-in low-speed, over-excitation


Automatic Voltage Stabilizer AVR R448
Voltage regulation ± 0.5%
Remote voltage adjustment range ± 5%
Short circuit capability 3 x Irated for 10 seconds
Voltage sensing 95 to 140 volts (50/60 Hz)
170 to 260 volts (50/60 Hz)
340 to 520 volts (50/60 Hz)
Response time Normal (1 sec) for ± 20% voltage variation
Rapid (0.3 sec) for ± 20% voltage variation

Automatic Voltage Stabilizer AVR R448

Automatic Voltage Stabilizer AVR R448

Automatic Voltage Stabilizer AVR R448



Q1. What are your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, 
we can pack the goods in your branded boxes after getting your authorization letters.

Q2. What are your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages 
before you pay the balance.

Q3. What are your terms of delivery?

Q4. How about your delivery time?
A: Generally, it will take 30 to 60 days after receiving your advance payment. The specific delivery time depends 
on the items and the quantity of your order.

Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and 
the courier cost.

Q7. Do you test all your goods before delivery?
A: Yes, we have a 100% test before delivery

Q8: How do you make our business long-term and a good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, 
no matter where they come from.

Automatic Voltage Stabilizer AVR R448


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Work Time :08:00-18:00(Beijing time)

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