The K FACTOR TRANSFORMER is an isolating transformer that can be loaded at 100% of load plus the harmonics load without overheating. The losses generated by the harmonics can be calculated by multiplying the K factor by the stray losses. The K FACTOR is derived from a mathematical formula, which states that the eddy current losses in a transformer will be increased in direct proportion to the sum of the percentage current at a given harmonic level multiplied by the square of the harmonic order.

**Advantages**

- Prevent the overheating of the transformer by increasing the stray losses with a K factor.
- Prevent neutral overheating by over sizing it at 200%.
- More efficient.

**Application**

The K FACTOR TRANSFORMER is used for non-linear loads. With the arrival of computers, faxes, printers and variable speed drives within the modern day business centers and industry we encounter harmonic problems. These loads are very non-linear and cause a non-sinusoidal waveform rich in harmonics.

The harmonics of most concern are the 3rd, 5th and 7th, causing serious problems with electrical office equipment and with power distribution systems.

**These harmonics cause the following conditions:**

- Overheating of the transformer : these harmonics increase the stray losses by a factor, better known as “K factor”, and these additional losses increase the temperature of the unit.
- High current in the neutral wire of the secondary transformer due to the presence of tripling harmonics as the 3rd , 6th and 9th . In the worst situation this current can be as high as 200% of the nominal current.
- Blowing of breakers or fuses at or below recommended current.

## Tech Sections

**Characteristics**

- Reduction of skin effects by using multiple conductors of thinner dimensions.
- Copper winding.
- Taps 2-3% FCAN, 2-3% FCBN.
- Delta-Wye connection standart or Delta-Zig-Zag.
- 150
^{o}C temperature rise. - Insulation class 220
^{o}C. - Enclosure type Nema 2, 3R and 4.
- Proper axial height of the winding. (Less than 15% between the primary and secondary winding).
- Low flux density in high grain oriented steels.
- Oversize neutral (200%) conductor

**Options**

- Electrostatic shields
- Aluminium winding
- 80
^{o}C and 115^{o}C temperature rise - k Factor (K4, K13, K20 and K30)
- Nema 3R and Nema 4.
- 50 Hz
- Electrostatic shields
- Aluminium winding
- 80
^{o}C and 115^{o}C temperature rise - k Factor (K4, K13, K20 and K30)
- Nema 3R and Nema 4.
- 50 Hz