Description: Product View DetailsIntroduction:AVR-12 Voltage Regulator is an electronic device which lets the alternator to produce fixed output voltage. It has open chassis, resin molded design and is intended to be mounted in the alternator's terminal box. AVR-12 measures the voltage between one of the alternator phases and the neutral point and adjusts the DC voltage applied to the excitation winding until reaching the desired voltage. The output stage of the device is a Half Wave tyhristor output associated with a free wheeling diode. Basically the unit is compatible with all brushless type alternators. A stability adjustment potentiometer is also provided for this purpose. The AVR-12 has a special relay-less electronic circuit design. The required minimum residual voltage for build up is 5 V- AC. The unit does not include moving parts; therefore it is able to operate in highly vibrating environments. The AVR-12 includes a low frequency protection circuit. This feature reduces the output voltage during overload or engine stop. Therefore the diesel engine is protected from excessive torque generated by high startup currents of large electrical equipments. Similarly, the diesel engine may be stopped under load without damage. The easy connection scheme of the device allows fast and easy replacement.Features:Half-Wave tyhristor output0-10 amps. output current0-115 volts output voltageRelay-less circuit designLow frequency protectionBuilt in voltage adjustmentStability adjustmentRemote voltage adjustment featureEasy connection schemeCompatible with various types of alternatorsOperation:The device operates on 230-volt phase-to-neutral voltage. The output voltage, as well as the internal supply voltage, is directly picked up from the input ensing voltage. The device needs 5 V-AC for startup.The half wave tyhristor output voltage is 115 volts maximum. During operation, the device continuously monitors the input voltage and increases/decreases the excitation voltage in order to maintain the input voltage to a constant value.The AVR-20 keeps the alternator voltage change in minimum limits in case of a load change, and helps to reach the required voltage value quickly. The regulation is P-I type, the proportional reaction is fast and the slow acting integral reaction helps the unit to recover the precise set voltage. The stability potentiometer adjusts the reaction speed of the device. This helps the unit to comply with a large variety of alternators.The AVR-20 is able to produce up to 20 amps continuous current output. The alternator voltage may be adjusted via the built in potentiometer. Also external voltage adjustment feature is provided, in this case the external potentiometer value shall be 1 kiloohms. The low frequency protection circuit shuts off the excitation voltage in order to prevent damage during engine stopping under load. The factory set value for the protection is 45Hz.The alternator EXCITATION terminals shall not be connected to any point but the unit. The NEUTRAL and EXCITATION (+) points are internally connected.Inputs and Outputs:PHASE-R: Alternator phase input.NEUTRAL: Alternator neutral input, internally connected to the Excitation(+) terminal.EXCITATION (+): Excitation winding (+) terminal, internally connected to the Neutral terminal.EXCITATION (- ): Excitation winding (-) terminalTechnical Characteristics:Phases: single phase ;Voltage Adjustment Range: 210-250 Volts min ;Frequency: 50/60Hz ;Frequency Protection Adj. Range: 40-50Hz ;Output Voltage: 0-115 volts-DC at 230 volts ;Output Current: 10A continuous, 20A for 5sec forcing ;Residual Voltage For Build Up: 5 volts minimum ;Regulation: +/- 2% typical ;Power Output Stage: Half Wave tyhristor ;Internal Fusing: 10A (fast acting fuse) ;Operating temperature: -10°C (14°F) to 60°C (140°F) ;Storage temperature: -20°C (-4°F) to 80°C (176°F) ;Maximum humidity: 95% non-condensing ;Dimensions: 125x68x35mm (L x W x H) ;Fixing centers: 115mm, 2xM6 ;Weight: 200 grams ; Shipping PolicyPayment MethodReturns PolicyShipping Policy ●Economy Shipping from America warehouse: USPS First Class Package usually takes 3-5 workdays UPS Surepost usually takes 1-6 workdays ● Standard Shipping From America warehouse: UPS GROUND usually takes 1-5 workdays ● Expedited Shipping From America warehouse: USPS Priority Mail Parcels Tracked Service : takes 1-3 workdays ● UPS NEXT DAY AIR SAVER SERVICE is also avaliable for most districts , if need , please contact us . Thanks ● Order will be shipped out within 1 to 3 business days upon payment received or cleared. All these transport timeliness Don't apply to remote districts .Payment Method ● PayPal payment accepted only. ● Items will be shipped to your eBay address. Please make sure it is correct. ● Payment must be received 4 days after auction ended.Returns Policy ● Customer satisfaction is our top goal. We believe our items are so outstanding. All products are quality checked. They are new and in good condition when shipped to our customers. We are convinced you will be happy with your Purchase. ● If product is defective or damage upon arrival, or wrong product shipped, please contact us immediately. Returns accepted within 30 workdays of delivery date and item must be in original new condition, not worn or altered in any way with attached tags & wrap. Otherwise deal is final. Return shipping must be paid by buyer. ● Please contact us first if you have any problems/questions/concerns. We will be happy to resolve any issues you may have in a cordial and friendly manner.On Nov-08-19 at 19:14:44 PST, seller added the following information:
Price: 45.05 USD
Location: Houston, Texas
End Time: 2024-02-05T09:49:49.000Z
Shipping Cost: 0 USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
Brand: Unbranded/Generic
Model: AVR-12
MPN: AVR-12
Country/Region of Manufacture: China
UPC: 623859245813
Manufacturer Part Number: AVR-12
Part#: AVR-12