In order to prevent or correct harmonic problems that could occur within an industrial facility, an evaluation of system harmonics should be performed if the facility conditions meet one or more of the criteria below.
1. The application of capacitor banks in systems where 20% or more of the load includes other harmonic generating equipment.
2. The facility has a history of harmonic related problems, including excessive capacitor fuse operation.
3. During the design stage of a facility composed of capacitor banks and harmonic generating equipment.
4. In facilities where restrictive power company requirements limit the harmonic injection back into their system to very small magnitudes.
5. Plant expansions that add significant harmonic generating equipment operating in conjunction with capacitor banks.
6. When coordinating and planning to add an emergency standby generator as an alternate power source in an industrial facility.
Often, the vendor or supplier of non-linear load equipment, such as variable frequency drives, can evaluate the effects that the equipment may have on the distribution system. This usually involves details related to the distribution system design and impedances, similar to performing a short circuit study evaluation.
1. The application of capacitor banks in systems where 20% or more of the load includes other harmonic generating equipment.
2. The facility has a history of harmonic related problems, including excessive capacitor fuse operation.
3. During the design stage of a facility composed of capacitor banks and harmonic generating equipment.
4. In facilities where restrictive power company requirements limit the harmonic injection back into their system to very small magnitudes.
5. Plant expansions that add significant harmonic generating equipment operating in conjunction with capacitor banks.
6. When coordinating and planning to add an emergency standby generator as an alternate power source in an industrial facility.
Often, the vendor or supplier of non-linear load equipment, such as variable frequency drives, can evaluate the effects that the equipment may have on the distribution system. This usually involves details related to the distribution system design and impedances, similar to performing a short circuit study evaluation.