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Leroy Somer R448 AVR Automatic Voltage Regulator for Brushless Generator

Leroy Somer R448 AVR Automatic Voltage Regulator for Brushless Generator

Place of Origin : CHINA
Brand Name : Leroy Somer
Certification : CE;CSA;ISO9001
Packaging Details : STANDARD PACKING
Delivery Time : WITHIN 7 DAYS
Payment Terms : T/T,Western Union,PayPal
Supply Ability : 1000PCS
Model Number : R448
Price : Negotiation
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Specifications of Leroy Somer R448 AVR Automatic Voltage Regulator for Brushless Generator

1. Directly Manufacturer
Over 15 years experience in generator field
3. OEM Service

For both AREP & PMG excitation systems,the alternator voltage regulator is the R 448. With AREP excitation, the R 448 electronic AVR is powered by two auxiliary windings which are independent of the voltage equal circuit.

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). The power supply voltage is rectified and filtered before being used by the AVR monitoring transistor.

To avoid voltage oscillations, the trip threshold for the LAM function should be set approximately 2 Hz below the lowest frequency in steady state. It is advisable to use the LAM at 25% for load impacts Š 70% of the genset rated power.LAM, action eliminated by cutting the ST5 jumper. During load impacts, the function helps the genset to return to its rated speed faster thanks to a gradual increase in voltage according to the

> If the speed drops between 46 and 50 Hz, the rated voltage follows a
fast gradient as it is restored.

> If the speed drops below 46 Hz, since the engine needs more help, the
voltage follows a slow gradient as it returns to the reference value.

The new functions of the R448 are :
- Parallel operation between alternators with C.T.
- Parallel operation with the mains with C.T.and R 726 module
- 3-phase sensing (R 731 module)
- LAM function integrated in the R 448 AVR.

Depending on various circumstances, three different delivery methods have been taken: by sea, by air cargo and by express service.
*By sea. This is the most economical way of delivery. Suit for big quantity order, the delivery cost dramatically low and assist you in achieving maximum profit. It normally would take about one month for cargoes to reach their destination port.
*By air cargo. The advantage of air cargo is it costs much less time than delivery by sea. Generally it would take about one to two weeks for cargo reaching its destination.
*By express service. It is the most expensive way of delivery, but it is really quick and convenient. Normally this door to door service can deliver the goods to your company only in 3-5days. Fortunately, we have signed big discount contract with most express companies, such as TNT, DHL and UPS, to help our customers cut their delivery expenditure.

In most situations, we accept T/T (telegraphic transfer or wire transfer) as the main payment method for normal orders. There are other different payment methods which are listed below:

T/T(telegraphic transfer): For order value which is lower than 3000 USD, 100% payment need to be made in advance. For order value which is higher than 3000 USD, 30% deposit need to be made in advance and the balance should be transferred when cargo is ready for delivery.

Western union: western union could be accepted only when the cargo sent by express service and do not need clear the custom in China.

PayPal: only be accepted for easy buy customers who delivery the goods by express service and do not need clear the custom in China.

After you transferred the deposit or complete payment of an order, please remember to send the copy of bank slip to our sales personnel by either e-mail or fax as the evidence of payment.

1. Our warranty period is 12 months from the date when the goods have been notified as ready for despatch by us.

2. During the guarantee period, we will repair or replace any damage that under proper use appears in the goods, except for the incorrect operation.

Tony (Export Manager)

Skype: benjamin-hua



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