When a telecommunications cell site loses grid power, the entire network's survival rests on the DC battery plant and its associated rectifiers. If a field engineer is dispatched to a site with failing backup power, they cannot waste time opening cabinets just to find out what hardware is installed. Standard spreadsheets fail in this environment because a single cell tower often hosts multiple, independent power systems from different manufacturers. This Memento system acts as a high-density, multi-node technical ledger, forcing engineers to map the exact electrical telemetry and hardware status of up to three separate DC plants simultaneously.
Structuring the Multi-Node Site
The primary challenge of cell site maintenance is hardware redundancy. A single "Site ID" might house an Emerson rectifier backing up 2G equipment and a ZTE rectifier dedicated to 4G.
This database is explicitly built to handle that redundancy without creating duplicate files. Under a single "Site Name", the template deploys three parallel, identical data structures: DC Plant 1, 2, and 3. For the first system, the engineer must lock down the "RectifierType-1" (Indoor/Outdoor) and specify the "DcPlantCabinetBrand-1" from a comprehensive telecom manufacturer list (Eltek, Erickson, Power One, Delta). By tying this directly to the "DcPlantCabinetSerialNo.-1", the central NOC (Network Operations Center) knows exactly which piece of iron is standing at that specific coordinate.
Granular Electrical Telemetry
Knowing the brand is useless without knowing the current electrical load. The template forces the engineer to record hard diagnostic metrics during their visit.
For every active rectifier, the system demands the "RectifierVoltage-1", the "BatteryCurrent(A)-1", and the "DistributionCurrent(A)-1". It requires an exact count of the modules via "RectifierModuleCapacity-1" and "RectifierModuleCount-1". If the distribution current exceeds the battery's theoretical output, the engineer immediately knows the site will fail under load. The "DcPlantStatus-1" field forces a strict triage classification—"Active", "Minor Repair", "Major Repair", or "Defective"—preventing vague "needs work" notes from clogging the maintenance queue.
The Battery Bank Lifecycle
Rectifiers only charge the system; the batteries keep it alive. The final stage of the audit is an unyielding assessment of the battery lifecycle.
The engineer must log the "DcPlantBatteryBrand-1" (Shoto, Narada, Sacred Sun) alongside the "DcPlantBatteryCapacity-1" and the total "DcPlantBatteryCount-1". Crucially, the system requires the "DcPlantInstalled-1" date and the observed "DcPlantActuaBackupTime-1". If a battery string was installed four years ago and the actual backup time has dropped from four hours to forty-five minutes, the database provides the irrefutable data needed to authorize a high-cost battery replacement before the site suffers a catastrophic outage.