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<br />City of Arden Hills, MN – 25X.137753 LIFT STATION CONTROL SYSTEM <br />January 2026 PAGE 26 90 04-15 <br />©2026 Design Tree Engineering, Inc All Rights Reserved <br />5. Auxiliary contacts "a" and "b" arranged to activate with MCCB handle. <br />6. Auxiliary contact that operates only when MCCB has tripped. <br />B. Approved Manufacturer: <br />1. Cutler-Hammer <br />2. ABB <br />3. Square D <br />4. Allen Bradley <br /> CIRCUIT BREAKER LOAD CENTER <br />A. To be used for loads other than motors and less than 100A. <br />B. Provide molded case, non-adjustable, thermal-magnetic, quick-make, quick-break, type circuit breakers. <br />C. Provide multi-pole breakers where indicated. <br />D. Handle ties on single pole breakers are not acceptable. <br />E. Tandem breakers are not allowed. <br />F. Provide circuit breakers with engraved ratings on the handle that are visible without removing covers <br />and with the interior doors closed. <br />G. Series rating of circuit breakers is not allowed. <br />H. GFCI rated breakers: <br />1. Class A GFCI protection, HACR rated. <br />2. Sense current imbalance of 4 milliamps or greater. <br />3. Ground fault sensor to trip the circuit upon current imbalance. <br />4. Test pushbutton on breaker. <br />I. Approved Manufacturer: <br />a. Square D <br />b. Cutler Hammer <br />c. ABB <br />d. Pre-approved equal <br /> PROGRAMMABLE LOGIC CONTROLLER (PROVIDED UNDER ALTERNATE 3) <br />A. Provide backup memory module and battery backed RAM, with 25% spare capacity for future <br />programing and control functions. <br />B. Power supply. <br />C. Discrete inputs, discrete outputs, analog input modules, and analog output modules as required for the <br />control scheme. <br />D. Diagnostic indicators for CPU status and status indicator for each I/O point. <br />E. All I/O shall be optically isolated. <br />F. Provide fusing for all inputs and outputs. <br />G. Cables and all accessories as required for complete system operation.