Which quantities should the drawing schedule separate?
A cabinet is an equipment enclosure; a string is an electrical battery grouping under the selected design. Record how strings are allocated among the UPS and external cabinets, and separately record the approved blocks-per-string basis where applicable.
Do not infer string count from cabinet symbols on a room layout, or a cabinet count from a single-line string label. Keep the model, manual revision and design approval alongside the schedule.
What does the manufacturer example establish?
Schneider Electric's Easy UPS 3S Pro IEC modular battery cabinet documentation separately lists total battery string quantity, strings inside the UPS and strings in individual modular cabinets. This supports distinguishing the quantities, not copying its configurations into another UPS model.
Critical Power Drafting is independent and is not affiliated with Schneider Electric. Confirm the selected region, model and current authorized arrangement. Engineering sign-off is performed only by the registered engineer on the job.
Sources: Schneider Electric: Battery String Configuration for Easy UPS 3S Pro, IEC modular battery cabinet
How can the allocation be reconciled?
Use an original allocation worksheet to compare the approved single-line, equipment schedule and layout. Leave a missing manufacturer mapping unresolved rather than fill it by repeating an adjacent cabinet.
| Record | Evidence | Consistency check |
|---|---|---|
| UPS model | Selected approved model and revision | Source applies to this equipment |
| Internal allocation | Approved strings inside the UPS | Separate from external cabinets |
| External cabinet | Unique cabinet ID and selected model | Layout and schedule identify the same enclosure |
| String allocation | Approved string IDs within each cabinet | No omitted or double-counted strings |
| Block basis | Approved blocks per string where applicable | Do not infer from enclosure dimensions |
| Reconciliation | Total allocated strings and design reference | Compare with the single-line total |
What can a synthetic count show without designing the system?
Illustrative example. A fictional approved equipment schedule allocates one string inside the UPS, two strings in Cabinet A and two strings in Cabinet B. The allocation sums to five strings and two external cabinets. This is arithmetic applied to hypothetical approved inputs; it is not a supported manufacturer configuration.
If the room layout labels two cabinets as two strings, record that mismatch and ask the drawing owner to resolve it against the approved allocation. Do not change battery wiring, protection, settings or block quantities to match the drawing.
This count does not establish voltage, capacity, runtime, redundancy or safe isolation. Those require the actual technical design and authorized review. After correction, reconcile both cabinet IDs and string IDs across the affected drawing set.
Common questions
What else should the bid team know?
Can strings exist inside the UPS?
Check the selected manufacturer configuration and approved design.
Does a cabinet outline establish blocks per string?
No. Retain the actual model and design evidence.
Does matching the counts establish runtime?
No. Runtime is a separate technical assessment.