Load Bank Testing

Load bank testing is the commissioning and maintenance practice of connecting artificial electrical loads to a data center's power systems. This proves generators, UPS units and switchgear under realistic demand before real IT equipment depends on them. Resistive banks convert electricity to heat, while reactive banks simulate inductive loads such as motors. Integrated systems tests typically run at 100% of design load for hours, often 4–24, and include simulated utility failures to confirm transfer to backup. Testing at commissioning levels 4 and 5 is normally required before a tenant is handed a hall. Operators repeat shorter tests, commonly monthly at partial load and annually at full load, because diesel generators that idle unloaded can suffer wet stacking. Results feed acceptance certificates and Uptime Institute reviews.