Active Member
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[China]
Contact name:
Aztechy Power Technology Co., Ltd |
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Specifications of Leroy Somer R448 AVR Automatic Voltage Regulator for Brushless Generator
1. Directly Manufacturer
2. 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
principle:
> 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
Email: info@alternator-avr.com
