A transformer protection relay does not replace upstream devices. It defines responsibility. By clearly assigning fault ...

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 ...

As modern society takes uninterrupted electricity supply for granted, electrical utility providers are increasingly measured by the reliability of the infrastructure used to deliver power to consumers ...

Differential protection is best understood as a fault control philosophy rather than a component category. The relay itself is secondary to the scheme it enforces. Once a zone is defined, the system ...

In early 2006, the Colorado Springs Utilities' (SU; Colorado Springs, Colorado) safety and health department reviewed a new fall-protection mast for the top of the 112 transformers in its substation ...