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The APC Zone UPS Service Bypass Help 

Service Bypass Panels are used to connect a UPS to the mains supply and to the equipment load.  They allow the UPS to be disconnected from the circuit without dropping power to the load, allowing the UPS to be removed or maintained.  Bypass Panels are usually hard-wired to the mains supply, but can use IEC input leads in some cases.  Other inputs and outputs are either hard-wired or IEC connections, depending on the model.

There are usually three switch settings;

Normal (where the power routes via the UPS),

Bypass (where the power routes directly to the load and the UPS is not powered) and

Test (where power routes directly to the load, but is also supplied to the UPS for testing or to keep the batteries charged).

The wiring for bypass panels, whether it is by plug-in leads or hardwired, is common across the units.  The Input to the Bypass Panel is from the mains supply, and there is then an input and output cable to the UPS, and an output to the load from the Bypass Panel.

Click here for APC's document regarding the use of 3-16KVA Service Bypass Panels.

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