Original DATAKOM AVR-4 Automatic Voltage Regulator for Generator Alternators

Original DATAKOM AVR-4 Automatic Voltage Regulator for Generator Alternators

Quick Details

Place of Origin: Turkey

Brand Name: DATAKOM

Model Number: AVR-4

Packaging & Delivery

FEATURES

• Half-Wave thyristor output
• 0-115 volts output voltage
• Start-up with 2 VAC
• Compatible with various alternators
• Designed for a highly vibrating environment
• Built-in voltage adjustment
• Stability adjustment
• Soft starting of voltage
• Compatible for 50 and 60 Hz
• Low-frequency protection
• Simple connection diagram

DESCRIPTION

DATAKOM AVR-4 voltage regulator is an electronic device that lets the alternator produce a fixed output voltage.

The device has an open chassis, resin molded design, and is intended to be mounted in the alternator’s terminal box. The unit does not include moving parts; therefore it is able to operate in highly vibrating environments.

The device measures phase to neutral of the alternator and adjust the DC voltage applied to the excitation winding
in order to reach the desired voltage.

The unit offers a low-frequency protection feature. A frequency measuring circuit continually monitors the generator output and provides low-frequency protection of the excitation system, by reducing the output voltage proportionally with a frequency below 45Hz.

The excitation power is derived directly from the generator terminals. The required minimum residual voltage for build-up is 2V-AC.

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.

VOLTAGE ADJUSTMENT

The generator output voltage is set at the factory but can be manually adjusted using the VOLT potentiometer. If voltage adjustment is required, proceed as follows:
Turn the VOLT control fully anti-clockwise.
Turn STABILITY control to the midway position.
Connect a suitable voltmeter (0-300VAC) across the line to neutral of the generator.
Start the Genset, and run on no-load.
Carefully turn VOLT control clockwise until desired voltage is reached.
If instability is present at rated voltage, refer to STABILITY adjustment, then re-adjust voltage if necessary.

STABILITY ADJUSTMENT

The stability pot adjusts the reaction speed of the device. This helps the unit to comply with various alternators.

The correct setting can be found by running the generator at no load and slowly turning the stability control anti-clockwise until the generator voltage starts to become unstable. The optimum or critically damped position is slightly clockwise from this point.

TECHNICAL SPECIFICATIONS

INPUT
Voltage 195-265 V-AC (L-N)
Frequency 50/60Hz nominal
OUTPUT
Voltage max 115 V-DC at 230 V-AC input
Current max 4 A-DC (continuous)
REGULATION
±%1 (with %4 engine governing)
SOFT START
2 sec
UNDER FREQUENCY PROTECTION
45 Hz
BUILD UP VOLTAGE
2V-AC at AVR terminals
DIMENSIONS
125x68x35mm (L x W x H),
Weight: 200gr
Fixing centers: 115mm, 2xM6

ENVIRONMENTAL

Operating temperature-20 to +70°C
Maximum humidity 95% non-condensing.
Storage temperature-30 to +80°C