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automatic ac voltage regulator,
avr automatic voltage regulators
Leroy Somer Automatic Voltage Regulators Diesel Generator AVR R449
The circuitry of the R449 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 excitatioin, a permanent magnet generator (PMG) added to the alternator supplies the AVR with voltage which 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.
|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|
Warranty: 2 years
after receiving payment, We offer two way delivery:
Delivery: 1. Quantity below 100pcs, within 2-3 days
2. Quantity above 100 pcs, within 7 days
Payment: T/T,Western union, L/C and Cash
1. We Ship to Worldwide, except APO/FPO
2. Orders processed timely after showing remittance copy.
3. We only ship to confirmed order addresses. Your order address MUST MATCH your address.
4.Items are shipped from China by Airmail, reach most of the countries within 4 to 20 business days.
5.Delivery time depends on destination and other factors, it may takes up to 20 business days.
6. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season.
7. If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction!
1. Guarantee:1 year after selled.
2. During guarantee,the items share free repairs or replacement.
3. Customer is responsible for the freight come-and-go,and the custom tax.
4. You may consider to send the defective item with a economical way,and we send back the repaired items with your new order together.
5. To save the cost,pls send the item back without packing.
6. Pls provide the defective appearance and related invoice number.
7.We do not repair or replace item with an expired warranty.
8.All emails will be answered within 1 business day. If you do not receive our reply, please kindly re-sent your email or give us a call any time.
Contact Person: Jennylai