Sulphur Hexafluoride Circuit Breakers

James R. White, Shermco IndustriesColumns, Spring 2019 Columns, Tech Quiz

Sulphur hexafluoride circuit breakers used to be the domain of utilities, but they are liable to be used now by any large- or medium-size industrial. This Tech Quiz will review some of the NETA standard requirements for these circuit breakers. 1. In ANSI/NETA ATS, which ANSI/IEEE standard is referred to if manufacturer’s data is not available? a. C57.04 b. C57.11 …

Computer-Based Technology for Ground Testing

Jeffrey R. Jowett, MeggerColumns, Spring 2019 Columns, Tech Tips

Since its inception in the early 20th century, testing grounded electrodes has been grounded on one technique and technology only: Fall of Potential. The test instrument made contact with the earth through long leads and driven probes, injected a current between the electrode being tested and a remote probe, and measured the voltage drop caused by earth resistance to another …

Testing Battery Banks

Ron Widup and James (Jim) R. WhiteColumns, NFPA 70E and NETA, Spring 2019 Columns

The 2021 NFPA 70E cycle started last year, and the Second Draft Meeting will convene July 14–19, 2019. One interesting benefit of being on the committee is the information that is shared with us. Some of it is obviously presented to serve one purpose or another, but some of it is put forward by well-known, independent laboratories that have no …