Automatic Voltage Regulator AVR-20 for Datakom Generator Generator
Introduction:
The AVR-20 Voltage Regulator is an electronic device that allows the generator to produce a fixed output voltage. It has an open chassis, molded resin design and is intended to be mounted on the generator junction box.
The AVR-20 measures the voltage between one of the generator phases and the zero point and adjusts the DC voltage applied to the excitation winding until the desired voltage level is achieved. The output stage of the output device is a half-wave thyristor associated with a freewheeling diode. In principle, the device is compatible with all brushless generators. a stability adjustment pot is also provided for this purpose. The AVR-20 relay has a special electronic circuit design. the minimum residual voltage required for construction is 5 V-AC.
The unit does not include moving parts; so it can operate in highly vibrating environments. The AVR-20 includes a low frequency protection circuit. This feature reduces the output voltage during motor overload or shutdown. Therefore, the diesel engine is protected from excessive torque currents generated by high starting of large electrical equipment. Likewise, the diesel engine can be stopped under load without being damaged. The connection diagram of the unit allows for quick and easy replacement.
FEATURES:
half-wave thyristor output,
0-20 amps. output current,
0-115 volt output voltage,
relayless circuit design,
low frequency protection,
built-in voltage adjustment,
remote voltage adjustment,
stability adjustment,
simple connection diagram,
compatible with various types of generators.
The AVR-20 Voltage Regulator is an electronic device that allows the generator to produce a fixed output voltage. It has an open chassis, molded resin design and is intended to be mounted on the generator junction box. In principle, the device is compatible with all brushless generators. A stability adjustment pot is also provided for this purpose.
The AVR-20 relay has a special electronic circuit design. The minimum residual voltage required for construction is 5 VAC.
OPERATION:
The unit operates with 230 volts phase-to-neutral voltage. The output voltage, as well as the internal power supply, is taken directly from the voltage detection input. The unit requires 5 V-AC for start-up. The maximum output voltage of the half-wave thyristor is 115 volts. During operation, the unit continuously monitors the input voltage and increases/decreases the voltage excitation to keep the input voltage at a constant value.
The AVR-20 keeps the AC voltage change to a minimum in the event of a load change and helps you quickly reach the desired voltage value. The regulation is of the PI type, the proportional reaction part is fast and the slow action helps the reaction unit restore the exact set voltage. The stability of the potentiometer adjusts the reaction speed of the unit. This helps the unit to be consistent with a variety of generators.
The AVR-20 can produce up to 20 amps of direct current. The generator voltage can be adjusted through the built-in potentiometer. External voltage adjustment function is also provided, in this case the value must be 1 kilo-ohm external potentiometer. The low frequency protection circuit turns off the excitation voltage to prevent damage during engine stall under load. The factory set protection value is 45Hz.
the terminals must not be connected to any generator EXCITATION point other than the unit. the NEUTRAL and EXCITATION (+) points are connected internally.
INPUTS AND OUTPUTS:
PHASE-R: Input phase generator.
NEUTRAL: Neutral input generator, internally connected to the terminal excitation (+).
EXCITATION (+): Excitation winding (+) on the terminal, internally connected to the neutral terminal.
EXCITATION (-): Excitation winding (-) terminal
TECHNICAL FEATURES:
phases: single phase.
Voltage adjustment range: 210-250 Volts min
frequency: 50/60Hz.
Adj frequency protection. range: 40-50Hz
Output voltage: 0-115 volts DC to 230 volts
Output current: 20A continuous,
Residual voltage to build: at least 5 volts
regulation: +/- 2% typical.
Final power stage: Thyristor Half Wave.
Internal fuse: 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)
mounting points: 115 mm, 2xM6
weight: 280 grams