To ensure real-time monitoring of pump motor status at its five lift pumping stations, Sheboygan Regional Wastewater Treatment Facility, Sheboygan, WI, replaced its bi-metallic overload relays with Eaton’s Motor Insight™ overload and monitoring relays. During the first month of operation, the Motor Insight overload and monitoring relays detected conditions that could have resulted in motor or pump failure and energy waste had the conditions not been addressed promptly.
With the Motor Insight’s advanced monitoring and communications capabilities, ground fault detection and motor protection, Sheboygan Regional Wastewater is not only preventing energy waste and dispatching maintenance personnel on an as-needed basis, it is also minimizing the potential for sewer system backups.
Need For Real-Time Monitoring
Sheboygan Regional Wastewater has five remote wastewater pumping stations throughout the city. The wastewater pumping stations are monitored remotely with a SCADA system, which does not monitor motor load conditions. Maintenance personnel routinely go 30 feet below ground to check the pumps and motors’ health. If a pump was partially restrained, the pump and motor would still run (inefficiently) until the bi-metallic overloads would eventually trip if current draw was sustained at a level above 115 percent full load amperage (FLA) for a period of time.