What is a VFI switchgear?

VFI switchgear is used for commercial/industrial and utility applications, and can be easily coordinated in the field without a PC, using field- selectable settings to meet distribution system protection requirements.

What is a VFI breaker?

Eaton’s Cooper Power series VFI vacuum fault interrupter switchgear provides an environmentally preferred, safer and more reliable approach to medium-voltage switching and protection.

What is a VFI transformer?

Eaton’s Cooper Power series VFI substation transformer combines a conventional distribution transformer with a vacuum fault interrupter (VFI) — delivering both voltage transformation and transformer overcurrent protection in a single space- and money- saving package.

How are vacuum switches used?

A vacuum switch is an electronic or mechanical device that provides an electrical switching contact function at a defined vacuum gas pressure level. It’s used in many vacuum applications for pressure control purposes and safety interlock functionality.

How does a vacuum fault interrupter work?

Operation. A vacuum interrupter uses a high vacuum to extinguish the arc between a pair of contacts. As the contacts move apart, current flows through a smaller area.

What does a pad mounted transformer do?

Pad-mounted transformers, those big green utility boxes commonly seen around town, serve the purpose of lowering high voltage to standard household voltage used to power electronics, appliances and lighting. These transformers are not protected in the way overhead lines and substations are.

What is the difference between ACB and VCB?

ACBs are used for low voltage application below 690Volts or it industry level it is called as LT application (Low tension), VCB are used for medium voltage application such as below 33kV and SF6 circuit breakers are used in high voltage application as well as medium voltage application.

Why We Use VCB instead of ACB?

Due to the integrity of Vacuum Bottles compared to ACB. Plus the VCB are way less maintenance demanding compared to ACB which demand more frequent maintenance on them. Number of operations which VCB can withstand are much more. No arc chutes issue and many more advantages.