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 ...

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, ...

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 ...

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 ...

Menlo Park, Calif. — Raychem Circuit Protection, a business unit of Tyco Electronics, has introduced the PolySwitch LVR series of resettable circuit protection devices to help protect electric motors ...

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 ...