Site Issue: Imaging Equipment May Not Need Immediate Recovery, but It Cannot Restart Without a Plan
Power loss to imaging, diagnostics and laboratories may not present the same immediate life-support risk as an ICU, but it can disrupt examinations, compromise samples, trigger equipment protection, delay reports and obstruct emergency workflows. A common question is: “Must CT, MRI and all laboratory equipment be generator-backed, and how large should the generator be?”
An imaging and laboratory project should not begin with a single kVA figure. First determine which equipment must continue operating, which only needs a controlled shutdown, and which may restart after the generator stabilizes. When large equipment, fans, chillers and pumps start together, transient demand can matter more than running power.
Configuration Review: Equipment Nameplates, Starting Method and Recovery Sequence
Imaging and laboratory reviews require equipment-level data. CT, MRI, lab automation, centrifuges, refrigerated sample storage, fume hoods, HVAC and UPS systems must be evaluated separately. Engineering confirms operating power, starting method, variable-frequency or soft-start control, sensitivity to voltage variation and whether manual approval is required before restart.
- Equipment nameplate, rated power, starting method and manufacturer requirements for backup supply.
- Priority of laboratory automation, sample processing, ventilation and refrigerated equipment.
- Existing panels, circuit breakers, cables, grounding and circuit labels.
- Whether delayed loading, staged startup or backup only for controlled shutdown is required.
Why This Design: Staged Loading Reduces Overload and Nuisance-Tripping Risk
If imaging, laboratory, HVAC, ventilation and normal lighting all return at once, the generator may face excessive transient demand, causing frequency dip, voltage variation or breaker trips. A more reliable sequence gives higher priority to critical laboratory systems, sample preservation and essential ventilation, while large imaging equipment is enabled manually or after a delay once the generator is stable.
The generator must be selected for transient response; ATS and low-voltage distribution must separate critical circuits; paralleling or expansion allowance may be required; remote monitoring should capture alarms, load percentage and operating hours; and on-site inspection should cover batteries, cooling, panels and test records. This reduces protective shutdowns and secondary faults during recovery.
Review Documents: Equipment-Level Imaging and Laboratory Data
- List of CT, MRI, laboratory automation, fume hoods, refrigerated equipment and laboratory HVAC.
- Nameplate, starting method, operating schedule and delayed-loading requirement for each device.
- Existing single-line diagram, panel photos, breaker ratings and cable specifications.
- Equipment covered by UPS, ride-through time and battery-maintenance records.
- Equipment grouped as “continue immediately,” “restart after delay” or “controlled shutdown” after an outage.