When the Department of Public Works for Garrett County, Maryland, wanted to replace a number of its lift stations and controls, the team wanted replacements that would offer safety features, cost savings and additional conveniences for their workers.
With these needs in mind, Garrett County selected the Arc Armor® control system from PRIMEX. The Arc Armor® control systems provides a safe and energy-efficient solution for optimum pump control in municipal lift station applications.
In terms of safety, the Arc Armor enclosure (a key piece in an Eco Smart Station® system) reduces the risk of injury resulting from electric shock and exposure to arc flash. Four individual compartments separate the high voltage incoming power main disconnect, the high voltage motor controls, the low voltage control components and the incoming conduit gas isolation zone. A service disconnect is included, eliminating the need for separate main disconnect. The motor control compartment features a voltage indicator to indicate when high voltage is present; and locks the operator out with an electrical interlock. The control compartment provides safe access for all frequency accessed operator devices (controller, switches, lights, etc.).
In terms of cost savings, the Energy View® controller provides pump speed control, efficiency monitoring and efficiency auto-tuning, all offering cost savings potential. A white powder-coated stainless steel enclosure, with its solar reflective characteristics, significantly reduces the temperature. This provides cost savings when VFDs are used, allowing for a lower cost cooling requirement.
In terms of convenience, features includes LED interior lighting that eliminates the need for operators to hold flashlights while working at night; three-point latches, all pad-lockable, providing strong seals; terminal blocks are raised and tilted, making them easier to see and allow for better connections when wiring.
Those features were key in Garrett County's decision to purchase the Arc Armor system, as was the convenience of set-up. "You just set it down, provide power to it, hook up the pump and sensors, and it's ready to go," stated Adam Conover, Business Development Manager for PRIMEX.
Since installation, Garrett County has been happy with the results. "They not only liked the safety features of the Arc Armor System, but the features which provide their workers with extra convenience," said Conover.
In addition, the return on investment (ROI) will be very fast. "The Energy View controller is providing them with a lot of savings each month, about 25% across all of the stations," said Conover. "All of those savings end up going back into their operating budget at the end of the year." Because the county doesn't need to run its drives at full speed, workers are not having to go out and do as much maintenance on their pumps. That also translates into more cost savings.