B01 Attachment 7 Jensen - Control Panel Sequence of Operation.pdf
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- Attached to
- HHCC Qtrs Construction - Amendment 5 Federal contract opportunity
- Solicitation number
- 75H70123R00040
About this file
This document specifies requirements for a wastewater utility pumping station, including controls and a control panel. Key requirements include: cycling two pumps automatically to maintain wastewater level; automatic alternation of the lead and lag pumps; high and low level alarms; redundant low level float; high water alarm activating both pumps if primary level sensing malfunctions; magnetic, full voltage, non-reversing motor controllers with overload protection and manual reset; labeled switches and controls; a NEMA Type 3R powder coated sheet steel enclosure; and a secondary main disconnect panel with lockout/tagout capability located near the primary control panel. Acceptable control panel manufacturers include California Motor Control Systems or approved equivalent.
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Text version
521 DUNN CIRCLE
SPARKS, NV 89431
(855) 468 - 5600
WASTEWATER UTILITY PUMPING STATION SPECIFICATIONS
1.1 PUMPING STATION CONTROLS
A. Control Sequence of Operation: Cycle each pump on and off automatically to maintain well wastewater level. Automatic control operates both pumps in parallel if well level rises to starting point of lag pump, until shutoff level is reached. Automatic alternator, with manual disconnect switch, changes sequence of lead‐lag sewage pumps at completion of each pumping cycle. High and low level set points will activate audible and visual alarms at control panel. Low level float to also work as redundant off float should primary level sensing equipment malfunction. High water alarm float shall activate both pumps at 60hz should primary level sensing device malfunction.
B. Motor Controllers: Magnetic, full voltage, non‐reversing. Include under‐voltage release, thermal‐overload heaters in each phase, manual reset buttons, and hand‐automatic selector switches. Include circuit breakers to provide branch‐circuit protection for each controller.
C. Install labels to identify switches and controls.
D. Control Panel: Complying with UL 508A, with weatherproof enclosure, covered compartments sized to accommodate controllers, circuit breakers, transformers, alternators, and programmable logic controller.
1. Basis of Design Product: Provide California Motor Control Systems, Inc., Duplex Control
Panels, or a comparable product approved by Engineer prior to bid.
2. Enclosure: NEMA 250, Type 3R powder‐coated sheet steel
3. Control panel must be supplied with a dead front panel door.
4. Secondary Main Disconnect: A secondary main disconnect panel must be installed in the immediate vicinity of the primary control panel. This main disconnect must have the ability to be locked out/tagged out during control panel maintenance.
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