Medium-voltage transformers

AR-VFI arc reduction VFI transformer

Looking for an intelligent solution to reduce incident energy in downstream arc flash zones?

Eaton's new AR-VFI arc-reduction VFI transformer

New arc-flash energy calculations have revealed that some transformer secondaries can present a problem for access. If energy is above 40 cal/cm2, low-voltage and high-voltage compartments are inaccessible until the upstream device is opened.

Eaton’s Cooper Power series AR-VFI transformer is built with the intelligence to reduce incident energy in downstream arc flash zones and mitigate the danger posed by power distribution equipment. Anomalies are sensed and transmitted through the integral control package to isolate the downstream equipment in less than 4 cycles clearing time—maximizing electrical safety and system reliability. Start your power reliability and personnel protection upgrade now.

Detailed product information

Downloads

AR-VFI transformer brochure
(PDF 615 KB)

This brochure describes Eaton’s Cooper Power series AR-VFI transformer which was designed with fully integrated medium-voltage vacuum interrupter (VFI), differential relay protection package, system control power transformer and 24-hour battery backup system capable of logging/sending/receiving data through the duration of an outage.
AR-VFI transformer specification
(PDF 352 KB)

This specification covers the electrical and mechanical characteristics of 15 kV, 25 kV or 35 kV arc-reduction vacuum fault interrupter distribution/substation or padmount transformers.
AR-VFI transformer white paper
(PDF 2 MB)

This white paper describes how integrated transformer Vacuum Fault Interrupter (VFI) technology coupled with secondary overcurrent sensing, arc-light sensing and modern relaying significantly reduces secondary incident arc energy. Pre-designed and factory-tested, Eaton's Cooper Power series AR-VFI transformer protection system utilizes this method to provide integral overcurrent protection on secondaries up to 6000 A.

View the AR-VFI transformer video

Please contact us today if you would like to hear from an Eaton representative.

Eaton is an intelligent power management company dedicated to improving the quality of life and protecting the environment for people everywhere. We are guided by our commitment to do business right, to operate sustainably and to help our customers manage power ─ today and well into the future. By capitalizing on the global growth trends of electrification and digitalization, we’re accelerating the planet’s transition to renewable energy and helping to solve the world’s most urgent power management challenges.

AR-VFI arc reduction VFI transformer

Looking for an intelligent solution to reduce incident energy in downstream arc flash zones?

Eaton's new AR-VFI arc-reduction VFI transformer

View the AR-VFI transformer video

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