Laserfiche WebLink
<br />City of Arden Hills, MN – 25X.137753 LIFT STATION CONTROL SYSTEM <br />January 2026 PAGE 26 90 04-14 <br />©2026 Design Tree Engineering, Inc All Rights Reserved <br />2.2 MAIN SERVICE DISCONNECT CIRCUIT BREAKER <br />A. Electronic trip, molded case. <br />B. OperaPng mechanism shall be quick-make, quick-break with provisions for padlocking in the open <br />posiPon. <br />C. Visible trip indicaPon. <br />D. True RMS sensing. <br />E. Adjustable seQngs for <br />1. Long-Pme pickup. <br />2. Long-Pme delay. <br />3. Short-Pme pickup. <br />4. Short -Pme delay. <br />5. Instantaneous pickup. <br />6. Ground Fault <br />F. Interchangeable raPng plugs. <br />G. Thermal magnePc backup protecPon. <br />H. Long Pme and ground fault memory. <br />I. Trip indicators for overload and short circuit. <br />J. Approved Manufacturers: <br />1. Cutler-Hammer <br />2. ABB <br />3. Square D <br /> POWER DISTRIBUTION BREAKERS: <br />A. Thermal magnetic, molded case. <br />B. Operating mechanism shall be quick-make, quick-break with provisions for padlocking in the open <br />position. <br />C. Adjustable magnetic trip. <br />D. Approved Manufacturer: <br />1. Cutler-Hammer <br />2. ABB <br />3. Siemens <br />4. Square D <br /> PUMP BREAKERS <br />A. Molded Case Circuit Breaker (MCCB): <br />1. UL 489, NEMA AB 1, and NEMA AB 3, with interrupting capacity to comply with available fault <br />currents; thermal-magnetic MCCB, with inverse time-current element for low-level overloads and <br />instantaneous magnetic trip element for short circuits. <br />2. Front-mounted, adjustable magnetic trip setting for circuit-breaker frame sizes 250 A and larger. <br />3. High switching capacity. <br />4. Lockable Handle: Accepts three padlocks and interlocks with cover in closed position.