What does the exciter field current meter indicate?

The exciter field current meter indicates the DC current supplied to the generator's field windings. This is crucial because the field current directly affects the magnetic field strength within the generator. A stronger magnetic field leads to a higher output voltage from the generator, which is essential for maintaining stable electrical generation.

Understanding the role of the exciter is also important. The exciter provides the necessary current to the field windings, which energize the rotor and create the electromagnetic field essential for the generator's operation. Monitoring this current allows engineers to manage and optimize generator performance.

The other options, such as AC current supplied to the generator, reactive power generated, and frequency of the power produced, do not accurately represent what the exciter field current meter measures. Each of these elements plays a role in the overall operation of a power system, but they do not pertain to the specific function of the exciter field current meter.