This piece was originally published in the June 2018 issue of electroindustry.
Caption: Test participants were (from left) ANSI C12 Vice Chair Larry Kotewa, Elevate Energy; Brent Cain, Itron; Frank Boudreau, Landis+Gyr, Andrew Dudding, Sensus, a Xylem Brand; Shawn Glasgow, Milbank Manufacturing; Paul Orr, NEMA; and Mark Shoemaker, Durham Company. Photo by Greg Bennett, Milbank Manufacturing
Paul Orr, Program Manager, NEMA
A combined team from the NEMA Electrical Metering Group and the Meter Mounting and Test Equipment Group as well as the vice chair of ANSI C12 met at Milbank Works Manufacturing in April to continue discussions on temperature rise.
The undertaking is a collaboration between the metering subcommittees of the Accredited Standards Committee ANSI C12.1 Subcommittee on Electricity Metering, meter socket manufacturers, and meter vendors. Its purpose is to develop a testing protocol and to conduct and evaluate such testing to determine the effect that certain variables may have on the temperature rise at various points on a simulated meter above ambient with regard to meter socket testing.
The attendees that visited Milbank are members of the Temperature Rise Interface Issue Working Group 2. The testing at Milbank was performed with a revised test plan using a different cable type and resistance temperature detectors (RTD) sensors for temperature measurements.
While the test was successful, the group had concerns about variability. One factor was related to the condition of a simulated test meter. Three-phase testing was also mentioned and needs to be further investigated.
Conclusive findings from the testing will be proposed to relevant Standards, the Code for Electricity Metering, ANSI C12.1, and UL 414 Safety Meter Sockets.