The DATAKOM AVR-40 voltage regulator is an electronic device that allows the generator to produce a fixed output voltage. The device has an open chassis, resin construction and is designed for installation in the generator terminal box. The device does not include moving parts; therefore, it is able to operate in conditions of strong vibration. The device measures the phase-neutral or phase-phase voltage of the AC generator and regulates the DC voltage supplied to the excitation winding until the desired voltage is reached. The device has a low-frequency protection function. The frequency measurement circuit continuously monitors the generator output and provides an output for low-frequency protection of the excitation system, reducing the output voltage in proportion to the frequency below a manually adjustable threshold. The nominal frequency can be easily changed to 50 or 60 Hz in the field by selecting the push-button link. The loss of sensitivity protection circuit stops excitation and protects the windings if there is no voltage at the sensor input. The excitation power is taken directly from the generator terminals. The minimum residual voltage required for ramp-up is 4 V AC. The output stage of the device is a half-wave thyristor output connected to a free-wheeling diode. The device is basically compatible with all brushless AC generators. A stability adjustment potentiometer is also provided for this. The ±3 V analog input provides external voltage regulation. The AVR has the ability to connect a CT to allow parallel operation with other generators equipped in a similar way. The overload protection circuit limits the output current to its nominal value, preventing the device from failing under overload or short-circuit conditions.
FEATURES: Continuous output current 40 A Half-wave thyristor output Designed for highly vibration environments Built-in voltage regulation system Stability regulation Compatible with various types of generators External trimmer voltage regulation input Analog voltage regulation input Parallel start input Sensor input provides phase-phase or phase-neutral control Compatible with frequencies of 50 and 60 Hz Low-frequency protection Exciter protection from current surge High-temperature protection Sensor protection from loss.
TECHNICAL SPECIFICATIONS: INPUT CHILDREN'S voltage 195-265 V-AC (LN) 340-450 V-AC (LL) (see wiring diagram) Frequency 50-60 Hz nominal POWER INPUT voltage 195-265 V-AC (LN) Frequency 50-60 Hz nominal OUTPUT Maximum voltage 90 V DC at 207 V AC input Maximum current 40 A-DC (continuous) REGULATION ± 1% (see note 1) THERMAL DRIFT 0.03% per °C change in ambient AVR (see note 2) TYPICAL SYSTEM RESPONSE AVR response 20 ms SOFT START 2 sec EXTERNAL REGULATION VOLTAGES±10% with 2kΩ 1W trimmerFREQUENCY PROTECTION42-50 Hz or 52-60 Hz (adjustable)POWER DISSIPATIONMaximum 18WOUT VOLTAGE4 V-AC on AVR terminalsANALOG INPUT±10% with ±3 V-DC (see note 3)SQUARED INPUTMax. input: 5AMax. drop: 10% (adjustable)DIMENSIONSHeight: 80 mm, Weight: 800 gECOLOGICALOperating temperature -20 to +70 °CMax. humidity 95% without condensation.Storage temperature -30 to +80 °CNOTEs1. With 4% motor regulation.2. Heated to 70°C3. Any device connected to the analog input must be galvanically isolated from ground with an insulation strength of 500 VAC.
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