Ultra Isolation - K Rated
Ultra Isolation and K-Rated Isolation Transformers

Product Description:
Ultra Isolation and K-Rated Isolation Transformers

Isolation Transformers at Sylvan are designed to block interference caused by Neutral of the line. It is specially constructed to eliminate all types of electrical noise such as common mode noise etc. This type of transformer isolates primary and secondary coils. A separated neutral to ground bond on the secondary side is created to be used as a separately derived source to combat current loops.

A grounded Faraday shield between the primary and the secondary is created using high insulation materials with special shielding techniques that attenuate common mode noise as well minimize transverse mode noise. The specially selected core with its magnetic properties exhibit sufficient leakage inductance to attenuate noise with proper transfer of fundamental power frequency. The Ultra Isolation transformer is designed with split winding construction and bifilar connections to reduce coupling capacitance of winding.

Ultra Isolation and K-Rated Isolation Transformers

K-Rated Isolation Transformer: 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. An additional function of the ULTRA K is to attenuate both common mode and transverse mode noise going to the load. The product is offered with four different K-Factors (K-4, K-7, K-13 & K-20) standard. The K-Factor is a means of rating the transformer's ability to withstand the heating effects of harmonic and fundamental current flowing in the transformer. Utilization of the proper K-Factor is absolutely essential in every installation. If too low a K-Factor is used, it can result in failure, fire, overheating, and wave form distortion.

What K-Factor to use?
Ultra Isolation and K-Rated Isolation Transformers

K-Factor transformers are available from a K-4 rating to a K-20 rating.

  • A K-4 Rated transformer is rated for 35% nonlinear load.
  • A K-7 Rated transformer is rated for 50% linear and 50% non-linear. The mix may be 50/50 at one point in time and change to 80/20 in the future.
  • A K-13 Rated transformer is rated for 75% nonlinear loading. This transformer would take care of most present and future needs. There is a higher initial cost, but the insurance that change may generate an unsafe situation may be worth it.
  • A K-20 Rated transformer is for installations that have an unusually high harmonic or nonlinear content. Here again there is a price premium for the additional insurance.
Load Type K-Factor
Incandescent Lighting Load K-1
Electric Resistance Heating K-1
Motor-Generators/Control Transformers/Distribution Transformers K-1
Electric Discharge Lighting K-4
UPS w/Optional Input Filter K-4
Welders/Induction Heating Equipment/PLCs K-4
PBX,UPS without I/P Filtering K-13
Multiwire Receptacle circuits in Small Health Care Facilities K-13
Main Frame Computer Loads/Solid state motor Drives K-20
Multiwire Receptacle circuits in Commercial offices/Emergency, Critical Care Rooms of Hospitals K-30


Features and Benefits Applications
  • Efficient Design to block Interference in Neutrals
  • Custom built to the level of Line Noise at your site
  • Sites K-Rated requirements
  • Shields Electronice Equipment against Neutral drops
  • Protects against bus short circuit or accidental discharge of capacitors
  • Increases Equipment life
  • CNC machines
  • Remote installations
  • Telecommunication Equipment
  • Data Centres, Call Centres, IPO
  • Induction Heaters/Inverters
  • UPS, VFD’S & Drives
  • HID Lightings
  • Hospitals/Medical Centres, Research Labs
  • Corporate, Banking and Financial Institutions

Range Available:

Single Phase 2kVa – 100kVA

Three Phase 40kVA – 900kVa

Product Categories

We can custom build an Ultra Isolation and K-rated Isolation Transformer as per the Line noise level at your installation site. Contact Us today for a site evaluation.

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