9/23/2023 0 Comments Ups lithium ion batteriesRemote trip of the battery cabinet breaker: note that the UPS does NOT generate the shunt trip command for battery breakers.The installation instructions are provided, document part no P-164000742. Conduit landing kit: This top-mounted landing kit is installed by the contractor and contains terminals for both DC power and control/status communications wiring.The battery system is not allowed to operate without its BMS functioning. Note that if a single AC BMS power source is connected to multiple battery cabinets in parallel, the disconnection of that single source will result in all connected battery cabinets tripping their breaker. An additional 480V or 120/240Vfeed, from the UPS bypass source is recommended but not required. Minimum requirement is to provide a single, protected 480V feed (or 120/240V feed, if powered by a 208VAC UPS), derived from the UPS output typically from customer’s output distribution. This is necessary to power the BMS and other controls. Control power, AC: each cabinet has landing terminals for 2 sets of 480VAC, 15A 3-phase power, or 2 sets of 1-phase 120/240VAC.Refer to the installation manual (part no 164000729), supplied with each cabinet. But the information history is not logged in the lithium BMS. It communicates status changes and immediately alerts the UPS, which can then send this information onto the client's network via the PXGX card. Lithium BMS tracks voltage, current, temperature and balances voltages constantly for every battery.Modbus information to the site’s Building Management System (also called BMS), is available for the user to implement their own data log and storage. Most lithium BMSs lack a user-friendly HMI interface/display. ![]() Lithium BMS systems also track and manage individual pack DC voltage balance to limit potential for development of thermal issues. ![]() For example, the BMS can disconnect the entire lithium battery string (cabinet) from the UPS if determined to be necessary and can do this without the client's permission or acknowledgement.
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