What is the difference between Static Bypass and Maintenance Bypass?
July 30, 2018

Static Bypass is the bypass line integral to the UPS which effectively joins the input supply to the output and continues to support the load during an internal fault.

The UPS needs to be put in to Static Bypass prior to the system being put in the maintenance bypass.

Maintenance bypass is usually a wrap around switch either of rotary or MCB design which allows the UPS to be powered down with the load powered directly from the mains whist maintenance is carried out on the UPS.

The Maintenance Bypass Switch is usually external to the UPS and incorrect operation can cause damage to the UPS, therefore the UPS must always be put in to Static Bypass to operating the Manual Bypass Switch.

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