EENG 105: Voltage Regulation and Design

A device that automatically regulates the voltage of an electrical system.

AVRs increase the voltage on the output side of a system. They do not increase the voltage on the input side of the system.

A location where an AVR could be installed is on the primary side of a power transformer bank.

AVRs can also be found on the secondary side of a power transformer bank.

AVRs can be installed on the main line of a feeder. This is the line between the substation and the consumers.

AVRs help adjust the voltage for different types of customers by installing them on the customer tapping point.

AVRs are devices designed to automatically control the voltage of a system, ensuring that the power delivered is at the desired level.

A control feature that allows the regulator to operate at currents higher than its nameplate rating when regulation is restricted. It is used to increase output capacity without overstressing the regulator.

A protection mechanism that limits both the upper and lower voltage limits of the regulator output. It ensures the output stays within a safe operating range.

A function that allows the regulator to reduce its output voltage when the demand exceeds the available supply. This prevents overloading and protects equipment.

A feature that restricts the regulation range when a specific current level is reached. This helps maintain stability during both normal and reverse operations.

The ability of the AVR to measure and monitor the distortion of the voltage waveform, revealing the presence of harmonics. Helps identify and address potential problems caused by distorted waveforms

Used to adjust the resistance and reactance drop compensation individually.

Indicates when the tap changer is in the neutral position.

Moves the draghands to the current position of the main/yellow hand and tests the neutral light.

Provides power to the control and tap changer motor from either the regulator or an external source.

Used to set the AVR in either manual or automatic mode.

Provides power to the control and tap-changer motor during tests or maintenance.

Allows measurement of the load-side voltage sensed by the control.

Protects the tap-changer motor and the control panel circuit.

Records the number of times the AVR has adjusted its output voltage.

Used for downloading data to the control and programming it.

A type of control unit used with Cooper AVRs, featuring keypads for adjusting voltage and time delays, offering a voltage bandwidth between 1 and 6. This control unit can be found on CL-4C and CL-5A AVRs.

A type of control unit used with Cooper AVRs, featuring keypads and LCD displays for adjusting voltage and time delays, offering a voltage bandwidth between 1 and 6. This control unit can be found on CL-5A AVRs.

The range of voltages that a control unit can accept, allowing for stable operation within a specific range.

The amount of time that a control unit takes to respond to a change in voltage, measured in seconds. This delay ensures smooth transitions.

A function that allows the control to detect changes in voltage and adjust accordingly, helping to stabilize the voltage output. Can be sequential, voltage averaging, or time integrating.

A light source that indicates whether the electrical system is neutral, providing safety information to users.

A device to protect the AVR motor from excessive current, which could lead to damage or failure.

A device to protect the AVR control panel from excessive current, ensuring safe operation.

A key component of the control unit, providing real-time information about the voltage, allowing for monitoring and adjustments.

A safety feature that prevents damage from excessive differential voltage, ensuring stable and safe operation.

A device connected across the load side of a voltage regulator that provides a voltage proportional to the circuit voltage. This voltage is used for control and to power the tap-changing motor.

A mechanism that compensates for voltage drops along a power line due to changing load currents. It aims to maintain a consistent voltage at the output of the regulator, even when loads are heavy.

A component that senses and measures the input voltage and compares it to a predefined setpoint. It initiates control actions when the voltage deviates outside the permissible range.

The range of voltage variation allowed around a setpoint before the control system activates. It defines the tolerance for voltage fluctuations.

The target voltage value that the voltage sensor compares the actual voltage against. It establishes the desired operating voltage of the system.

The process of regulating voltage output by adjusting the tap position on a transformer. This alters the voltage supplied to the load.

A type of electric motor used to adjust the tap position on a transformer. It's driven by the control system to change the output voltage level.

A mechanism that uses a combination of resistors and capacitors to create a voltage proportional to the current flowing through a circuit. It provides a measure of load current for control purposes.