Service Bypass Mode - HP PowerTrust A3589A Manual

Overview
UPS Modes

Service Bypass Mode

This mode allows the Electronics Unit, Battery Box, Control Panel, and Fan to be serviced
while still providing AC input power to the connected equipment.
In contrast to Automatic Bypass mode, which is triggered on automatically by the UPS,
Service Bypass mode occurs when the Service Bypass switch is manually turned to
BYPASS. In Service Bypass mode, AC input power passes through the Bypass breaker,
through the Service Bypass switch, which is set to BYPASS, and on to the output breakers
and receptacles.
Because the Electronics Unit and Battery Box are isolated from the AC input and the
output, there is no power failure protection while in this mode. Connected equipment is
protected from surges, however, by the Bypass circuit breaker.
Chapter 1 1-33