A practical checklist covering source quality, phase conditions and load characteristics before a dual-source transfer.
Checks Before Transfer
Confirm that both input sources are within the permitted range and check voltage, frequency and phase conditions. Transfer logic and acceptable windows vary by device, so use the documentation for the selected model.
Also review load capacity, upstream and downstream protection, and bypass arrangements. Before commissioning, test alarms, transfer and recovery under controlled conditions and record the site parameters for maintenance.
