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

Nov. 13, 2008, PULLMAN, WA - Schweitzer Engineering Laboratories, Inc. (SEL) is now taking orders for two new products, the SEL-787 and SEL-487E Transformer Protection Relays. These are the first ...

Complex grids depend on equipment such as transformers, protection relays, switchgear, and cables—each of which can develop faults not immediately visible during normal operation. As a result, ...

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 ...

GE’s Digital Energy business has launched its Multilin 845 Transformer Protection System, part of the Multilin 8-Series platform of protective relay devices, which includes the 850 Feeder Protection ...

The latest version of RelaySimTest (V3.20) enables users to extend the benefits of system-based testing to transformer protection 1. Instead of adopting the usual approach of simply testing the ...

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 ...

Bender UK launches a new split-core current transformer enabling faster, safer upgrades to rail signal power protection systems ...

What is ground-fault protection? The answer depends on whether you are talking about ground-fault protection of equipment or ground-fault protection of people. Just because ground-fault protection is ...