Note: All Code references are based on the 2014 NEC. The NEC has separate sections for transformer feeder protection and transformer protection. Article 240 lists requirements for transformer feeder ...

Q. What are the NEC rules for sizing transformer secondary conductors? A. A set of conductors supplying single or separate loads is permitted to be connected to a transformer secondary without ...

For utilities, proper protection against high voltage transient overvoltages and overloads is critical to ensure maximum life of their power transformers. Failure to do so can result in significant ...

Duke Energy is evaluating the use of a point to point digital secondary system to reduce the amount of copper utilized in traditional substation protection designs. Physically large substations with ...

A variety of over-current and overvoltage products are on the market for protecting VDSL telecommunications circuits. These include transformer line-side capacitors, transformer driver-side diodes, ...

Current transformer (CT) saturation presents a critical challenge in the realm of power system protection and automation. Under fault conditions, the magnetic core of a CT may become saturated, ...