Green Bay is Wisconsin’s oldest city and sits at the mouth of the world's largest body of surface freshwater– the Great Lakes. In 1931, it was discovered that local waterways had been polluted to such an extent that concerned citizens raised money to build the city’s first wastewater treatment facility. Over several decades the Green Bay Metropolitan Sewerage District (GBMSD) was expanded and upgraded to accommodate population and industry growth. In 2008, Green Bay acquired a second treatment facility in De Pere, Wisconsin, and in 2012 GBMSD adopted a new brand: NEW Water. Today NEW Water serves over 236,000 residents from 15 communities covering a 285 square mile area.
In 2019, Bender products were selected for a project with NEW Water. The need for continuity of service is of utmost importance to any wastewater treatment facility.
The NEW Water project includes some safety-by-design steps, including an Arc Flash mitigation system and High Resistance Grounding packages engineered and supplied by Tech4 LLC out of Wisconsin. The design is meant to serve the facility for decades to come.
The solution, installed by Tech4 LLC, was a combination of current limiting resistors and contactors for pulsing fault location with some of the latest Bender products. The engineering team at Tech4 LLC worked closely with Bender’s application engineers to fit the solution to the application. On generator applications, non-pulsing simple Series 1 HRG package solutions were incorporated. The system took advantage of the NGRM700 (a Neutral Grounding Resistor Monitor) and a current sensor that could monitor for ground-faults over a wide frequency range on the main power transformers.