Frequency is a change in the way alternating current (AC) flows. Frequency is closely connected to the speed of the rotation of the motor of a generator. The frequency of power generators in the United States and other countries is 60 Hz and the motors of these generators rotate at 3600 rpm. Variations in frequency can cause the rotation in the motor to change. When this happens, there will be changes in the efficiency of the motors.
Areas connected to a stable power grid do not typically experience frequency variations. Frequency variations normally affect areas using a dedicated power generator. High demand for power worsens the situation. While this common power problem does not affect computer systems, it does have a negative effect on the efficiency of devices dependent on a stable frequency. Similar to voltage fluctuations, frequency variations can also cause lights to flicker.
These frequency variations may make the rotation of the motors faster or slower since they will have to match the frequency of the power input. This will cause the motors to become inefficient. It may also cause the motors to heat up over time and result in the gradual breakdown of the motor. There may be some rare instances when power failure will happen due to frequency variations.
To deal with frequency variations, it is necessary to check all sources of power. After assessing the power sources, it is important to make the necessary repairs or corrections, and, if needed, replace them. It may also be necessary to move sensitive loads to manage this common power problem. The use of an uninterruptible power supply (UPS) system and a power conditioner can reduce the effects of frequency variations.