Which component assists in synchronizing two electrical systems?

The component that assists in synchronizing two electrical systems is a synchroscope. A synchroscope is an instrument used to visually indicate the phase relationship between two electrical systems, typically in alternating current (AC) grids. It provides a graphical representation that helps operators determine when the frequency and phase of the incoming supply matches those of the system already in operation. This is crucial when connecting generators or synchronizing power grids as it ensures that both systems are in sync, preventing potential damage to electrical equipment due to phase differences.

The synchroscope typically has a rotating dial and a pointer that indicates whether the two systems are running in sync. If the pointer is moving to the right, it indicates that the incoming system is faster, while movement to the left shows it is slower. An operator can use this information to adjust the speed of generators or motors before making a connection.

In contrast, the other options serve different purposes. A voltage regulator maintains a constant voltage level in a power supply system, while a frequency inverter converts direct current (DC) to alternating current (AC), changing its frequency to control motor speeds or other applications. A phase comparator, although useful in various applications, typically provides a means to compare the phase angles of two signals but does not visually display the synchronization