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The AVC63-12A1 regulates the level of excitation supplied to the field of a conventional, brushless, synchronous generator. Regulation is achieved by sensing the generator output voltage, converting it to a DC signal, and comparing it to a reference voltage to control the DC field power up to 12 Adc at 63 Vdc continuously.
Excitation Power Regulation
Under-Frequency & V/Hz Compensation
Inverse-Time Overexcitation Shutdown
The AVC63-12 and AVC125-10 regulate the level of excitation supplied to the field of a conventional, brushless, synchronous generator. Regulation is achieved by sensing the generator output voltage, converting it to a dc signal, and comparing the signal to a reference voltage. An error signal is developed and used to control the dc field power in order to maintain a constant generator output. Each regulator includes frequency compensation with selectable slope, inverse-time overexcitation shutdown, buildup circuitry, single- or three-phase voltage sensing, single- or three-phase shunt or permanent magnet generator (PMG) power input, parallel droop compensation, and an accessory input. The accessory input provides compatibility with devices such as var/power factor controllers or excitation limiters.
This specific A1 model is factory-configured for a 120 Vac power/sensing input at 50/60 Hz. The regulator includes frequency compensation with selectable slope, inverse-time overexcitation shutdown, buildup circuitry, single- or three-phase voltage sensing, shunt or permanent magnet generator (PMG) power input compatibility, and parallel droop compensation. Furthermore, its integrated accessory input provides seamless compatibility with devices such as VAR/power factor controllers or excitation limiters.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
BASLER ELECTRIC AVC63-12A1 Voltage Regulator Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Power Industry
Installed in thermal, hydro, or distributed diesel generator sets. When the grid load fluctuates drastically, it detects output voltage changes and rapidly adjusts the excitation current to prevent voltage sags or spikes, maintaining extreme stability of grid frequency and voltage.
Oil Extraction
Used in main generators for onshore and offshore drilling rigs. When drilling equipment (such as mud pumps and top drive systems) starts, it creates massive instantaneous shock loads. This AVR responds within 4 milliseconds to provide transient voltage compensation, preventing generator shutdowns due to overloading.
Rail Transit
Used in traction generators of diesel locomotives and auxiliary generator sets for air conditioning and lighting in diesel multiple units (DMUs). When frequent acceleration and deceleration cause unstable engine speeds, it utilizes its Volts-per-Hertz (V/Hz) characteristic for slope compensation, protecting sensitive onboard electronics from burning out.
Water Conservancy
Applied in emergency generators for flood control pumping stations and sluice gate hoists. During extreme natural disasters like typhoons and heavy rainfalls that cause widespread power outages, it ensures pump units can successfully start up on the first try, providing high power reliability to prevent flood disasters.
Chemical Industry
Used in self-provided power plants for continuous production lines in chemical plants and oil refineries. Chemical distillation and reactor controls do not tolerate a single second of voltage flicker. The AVR can work with Parallel Droop Compensation to achieve precise reactive power sharing among multiple generator sets, ensuring grid-tied operational stability.
When operating and maintaining the AVC63-12A1, it is critical to ensure that the connected exciter field resistance is not lower than 5.25 Ohms to prevent regulator burnout from excessive current. During wiring or potentiometer calibration, both power and sensing inputs must be completely disconnected to prevent high-voltage electrical shock.
if the generator fails to build voltage due to residual voltage dropping below 6 Vac, a manual DC field flashing must be executed in accordance with the manual. For multi-generator parallel operation, the 1A or 5A current transformer signals must be correctly connected, and the onboard DROOP potentiometer adjusted for reactive load balancing.
Additionally, the unit must be mounted vertically inside a ventilated, dust-free enclosure between -40°C and +70°C, supplemented by regular terminal tightness and moisture-proof seal checks during outages.
Alternative Names
Alternative Names
AVC63 12A1AVC63-I2A1AVC63-I2AI
Technical notes
Technical notes
This specific model supports a single- or three-phase sensing input range of 90–132 Vac at a nominal frequency of 50/60 Hz, accepts a 90–153 Vac Shunt or PMG power input, and maintains voltage regulation within ±0.25%. Within its control and protection circuitry, it integrates an inverse-time overexcitation shutdown triggered when the field voltage exceeds 100±5 Vdc, along with an adjustable Volts-per-Hertz underfrequency compensation acting at a 45 Hz or 55 Hz knee-point; furthermore, it accommodates an external 1A or 5A current transformer signal to provide up to 10% parallel reactive droop at 0.8 power factor, while providing interfaces for a remote 10kΩ potentiometer (±10% adjustment) and a ±3 Vdc analog accessory input.
The AVC63-12A1 is a solid-state Automatic Voltage Regulator (AVR) manufactured by Basler Electric, primarily used to regulate the level of excitation supplied to the field of a conventional, brushless, synchronous generator.
What is the core voltage regulation principle of AVC63-12A1?
It senses the generator output voltage, converts it to a DC signal, and compares it to an internal reference voltage, an error signal is then developed to dynamically control the DC field power to maintain a constant generator output.
How to install and use products like AVC63-12A1?
The regulator is typically mounted vertically using screws inside the generator's control cabinet or terminal box. Usage requires connecting power inputs, single- or three-phase sensing lines, field excitation lines (F+, F-), and verifying the frequency jumper and adjustment potentiometers prior to operation.
What is the under-frequency/frequency compensation function on AVC63-12A1?
It features a Volts-per-Hertz characteristic with a selectable slope. When the engine speed drops below the designated knee-point due to overload or deceleration, it automatically reduces output voltage to protect the excitation system.
How does AVC63-12A1 provide overexcitation protection?
It incorporates an inverse-time overexcitation shutdown function. When the field voltage exceeds the 100 Vdc threshold, the regulator initiates a timed shutdown circuit, where the time delay is inversely proportional to the severity of the overexcitation.
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