Current Transformers

The Institute of Electrical and Electronic Engineers defines a current transformer (IEEE Std C57.13) as “a transformer intended to reproduce in its secondary circuit, in a definite and known proportion, the current of its primary circuit with the phase relations substantially preserved”. Its primary winding is connected in series with the conductor carrying the current to be measured or to be controlled and its secondary winding is connected to the measuring, protection or control devices. Osborne designs and manufactures current transformers which are used for instrumentation applications, others which are used for power system synchronizing applications and others which are used in protection circuit application. They have been designed to meet specified current ratios, burden impedance and transformation errors.


Let’s talk about your project.


Contact Us

Current Transformer Design Options Table:

Spec Range Available
Input Voltages: 0 – 600 Volts
Output Voltages: 0 – 600 Volts
Thermal Voltampere Ratings: 0.250 – 5,000 Voltamperes
Compensated Voltamp Rating: 0.250 – 5,000 Voltamperes
Burden Power Factor: 0 – 100% Lagging or Leading
Frequency: 20 – 100,000 Hertz
Phase: Single – Multiple
Electrostatic Shielding: Single – Multiple Shields
Terminals: Wire Leads – Finger Safe
Enclosures: Open Core & Coil – Hazardous Environment
Agency Approvals: UL, CSA, CE and/or TUV

What Are Osborne’s Current Transformer Design Options?

“Design Options” refers to the types of features typically available for Osborne’s Current Transformers. We share these options to help you determine if Osborne’s capabilities are a good fit for your project.

If you’re looking to develop a custom current transformer and it fits in the ranges of Osborne’s current transformer design options table, there’s a great chance that we can make your project a success. Call Osborne today at 800-229-9410.

Why Choose Osborne?

Premium current transformers are ideal for select applications. Does your project demand exceptional design service and high performance? If so, please consider our Design Options page for details about the performance benefits of application specific engineering. Next we encourage you to visit our Partners page for a clear idea of Osborne’s unique collaborative development approach.