What is mean by K-rated transformer?
K-rated transformers are: able to handle the heat generated by harmonic currents; not effected by harmonics; very efficient when used under their K-factor value; manufactured with heavier gauge copper and a double sized neutral conductor; and have higher magnetic to resistive properties than a standard transformer.
What is k13 isolation transformer?
A K-13 Rated transformer is rated for 75% nonlinear loading. The overall function of the ULTRA K Isolation Transformer is to deliver conditioned power to a nonlinear high-harmonic current load and operate at safe temperatures while minimizing the harmonic current delivered to the power grid.
What is a transformer K factor rating for?
A K-factor rated transformer is designed to handle a degree of harmonic load currents without overheating. The K-rating number of the transformer (1, 4, 9, 13, 20) is in indication of the amount of harmonic current the transformer is capable of handling.
How is a transformer rated?
Transformer ratings are measured in volt-amperes (VA) or kilovolt-amperes (WA). Engineers rate power transformers according to the maximum output voltage and current they deliver. A transformer with 12 V output, capable of providing up to 10 A of current, has a VA capacity of 12 V x 10 A, or 120 VA.
What is K 4 rated transformer?
It is used to specify transformers for non-linear loads. Transformers with a rated K factor of 4, 9, 13, 20 are available. For balanced loading, a transformer with a K factor of 4 should be specified when no more than 50% of the total load is non-linear.
What is non-linear load?
A load is considered non-linear if its impedance changes with the applied voltage. These non- sinusoidal currents contain harmonic currents that interact with the impedance of the power distribution system to create voltage distortion that can affect both the distribution system equipment and the loads connected to it.
What is kVA rating?
KVA (Kilovolt-Ampere) is the rating most commonly used to rate a generator’s power output. The higher the KVA rating, the more power the generator produces. For adequate power to your equipment, you’ll need a generator with adequate KVAs.
What is power rating of a transformer?
Power transformer ratings are mainly measured in kilovolt amperes (kVA) or megavolt amperes. It means the primary winding and the secondary winding are designed to withstand the kVA or MVA ratings, which is stamped on the transformer nameplate.
How do you select a K rated transformer?
For balanced loading, a transformer with a K factor of 4 should be specified when no more than 50% of the total load is non-linear. A transformer with K factor 9 should be specified when 100% of the load is non-linear. For critical applications, K=13 can be considered.
What is K rating in transformer?
A K-Factor rating is an index of the transformers ability to supply harmonic content in its load current while operating within it temperature limits. For Dry Type Transformers a K-Factor calculation is made to determine the amount of the Harmonic Content present in a power system.
What is K – 13 transformer?
K-Factor 13: A K-13 transformer can accommodate 200% of the harmonic loading of a K-4 rated transformer. These transformers are used for multiple receptacle circuits in health care facilities, UPS without optional input filtering, Production or assemble line equipment, Schools and classroom facilities.
What is transformer rating factor?
What is Transformer K-Factor Rating. A K-Factor rated transformer is one which is used to deal with harmonic generating loads. Harmonics generate additional heat in the transformer and cause non-K-rated transformers to overheat possibly causing a fire, also reducing the life of the transformer.