DATAKOM AVR-5 Voltage Regulator

[LincTex]

Never heard of these until today... have any of you any experience with these?   

$66 USD plus $9 S&H


DATAKOM AVR-5 ALTERNATOR VOLTAGE REGULATOR

http://www.ebay.com/itm/DATAKOM-AVR-5-ALTERNATOR-VOLTAGE-REGULATOR-/200506791571

DESCRIPTION

AVR-5 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-5 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 thyristor 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-5 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-5 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 start-up 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 thyristor output
    0-5 amps. output current
    0-115 volts output voltage
    Relay-less circuit design
    Low frequency protection
    Built in voltage adjustment
    Stability adjustment
    Remote voltage adjustment feature
    Easy connection scheme
    Compatible with various types of alternators

OPERATION

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 sensing voltage. The device needs 5 V-AC for startup.

The half wave thyristor 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-5 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-5 is able to produce up to 5 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 kilo-ohms. 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 (-) terminal

TECHNICAL 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: 5A continuous, 6A for 5sec forcing ;
    Residual Voltage For Build Up: 5 volts minimum ;
    Regulation: +/- 2% typical ;
    Power Output Stage: Half Wave thyristor ;
    Internal Fusing: 5A (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: 180 grams ;

Check out my other DATAKOM products for generator sets:
    J1939 Communication Units
    Synchronization Units
    Automatic Mains Failure Units
    Remote Start Units
    Manual Start Units
    Automatic Transfer Switches
    Battery Chargers
    Alternator Voltage Regulators
    Panel Measurement Units
    Earthquake Units
    Telecommunication Units
    Extension Units

[Thob]

Ships from Ukraine?  Return shipping cost might be a bit high, if needed!

I'd rather spend my money on one from Central Georgia Generator:

http://www.centralgagenerator.com/avr.htm

They might be selling the same unit from China, but returns and support with American English speaking people are right here in the USA.