Operation Modes
In a
Normal operation
During normal operation, the UPS converts utility power to conditioned power for the connected load.
Battery operation
During battery operation, the UPS provides power to the connected load from its internal and (if applicable) external batteries for a finite period. The UPS transfers to battery operation if the supply of utility power fails, or is outside
Bypass operation (or static bypass operation) utility
Static bypass operation can either be obtained by user request or automatically, as the UPS will switch into bypass operation if both the normal and battery operation modes are unavailable. During static bypass operation, the utility power is sent through internal Radio Frequency Interference (RFI) filters to the connected load, bypassing the internal power converters. The UPS transfers to bypass operation following a command received via the user display, or after a short or heavy overload on the output of the UPS. Battery
Mechanical bypass
In mechanical bypass, utility power is sent directly to the connected load through a mechanical breaker, bypassing all internal UPS functions and filters. Mechanical bypass is obtained by the operation of the mechanical bypass breaker lever located behind the front cover. Mechanical bypass is a feature designed to keep the load supplied with utility power at maintenance of the power sections of the UPS. All major maintenance operations can be performed with the UPS running in mechanical bypass, and with the load being supplied directly with unconditioned utility power.
Wrap-around maintenance bypass
The UPS can be connected to an external Maintenance Bypass Panel. When activated, this panel bypasses the entire UPS Enclosure (only possible with an optional APC Maintenance Bypass Panel), feeding utility power directly to the load. An activated
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