K factor pada transformer (oil & dry type)

[Anonymous user]

Pak @HelvinHermanT ,

Mohon informasi data K-factor pada transformer distribusi 20kV/400 V yang dirancang agar tahan (tidak rusak/terbakar) pada level harmonik tertentu ?

Dan mohon informasi standard IEC yang mengatur K-Factor pada transformer distribusi 20kV/400V tersebut ? 

[HelvinHermanT]

@Fikri_Ferdiana @taqin @Dwinanto_Setyadi 

[HelvinHermanT]

Hi Bu,

K-factor ini didasarkan pada standar UL - Underwriter Laboratories dan IEEE, semuanya dari Amerika Serikat atau HD 538 dari Eropa dengan nama factor K.

Bisa dilihat dan dipelajari pada 

IEEE C57.110-2018 - IEEE Recommended Practice for Establishing Liquid Immersed and Dry-Type Power and Distribution Transformer Capability when Supplying Nonsinusoidal Load Currents.

Provided in this recommended practice are calculation methods for conservatively evaluating the feasibility for an existing installed dry-type or liquid immersed transformer, to supply nonsinusoidal load currents as a portion of the total load. Also provided is necessary application information to assist in properly specifying a new transformer expected to carry a load, a portion of which is composed of nonsinusoidal load currents. A number of examples illustrating these methods and calculations are presented. Reference annexes provide a comparison of the document calculations to calculations found in other industry standards. Suggested temperature rise calculation methods are detailed for reference purposes.