- Tabulate a list of all the equipment to be supported by the UPS.
- Confirm the power rating of each device to be backup. The rating can be watts or VA. Add them together.
- Multiply the total power consumption by a safety factor of 1.3 to cater for in-rush current surge and future expansion.
- Check for the requirement of the back-up time for the equipment. More space (additional external battery pack) is required if longer backup time is needed.
- Depending on the requirement, select either an offline, online or line-interactive UPS accordingly.
- Depending of site situation and configuration, centralise UPS maybe a more cost effective solution than multiple UPS approach.
- Centralise UPS will require “hard-wirings”, eg isolator, power cables, distribution board, etc
- De-centralise UPS installation will be straight-forward and easier to implement.
- Check the incoming power availability (Single-phase or Three-phase breaker) in order to determine if electrical wirings is required.
- Always ensure there is 24 hours air-conditioning in the room.