APC SY160K160H User Manual
990-3015-001
Symmetra PX 160 kW 400 V Operation
7
Operation
Operation Modes
In an installation without a maintenance bypass panel, the UPS has four different operation modes. If
the installation includes a PDU-XR or an external maintenance bypass panel, wrap-around
maintenance bypass mode will also be available.
the installation includes a PDU-XR or an external maintenance bypass panel, wrap-around
maintenance bypass mode will also be available.
Normal operation
During normal operation, the UPS converts mains/utility power to conditioned power for the
connected loads.
connected loads.
Battery operation
During battery operation, the UPS provides power to the connected loads from its external batteries
for a finite period. The UPS transfers to battery operation if the supply of mains/utility power fails, or
is outside pre-defined limits.
for a finite period. The UPS transfers to battery operation if the supply of mains/utility power fails, or
is outside pre-defined limits.
Bypass operation
Bypass is a feature that keeps the load supplied with mains/utility power during maintenance of the
UPS power sections. In bypass, mains/utility power is sent directly to the connected load bypassing
all internal UPS functions and filters. Battery back up is not available in bypass operation.
UPS power sections. In bypass, mains/utility power is sent directly to the connected load bypassing
all internal UPS functions and filters. Battery back up is not available in bypass operation.
Wrap-around maintenance bypass (optional)
The UPS can be connected to a PDU-XR or an optional external maintenance bypass panel. When
activated, this panel bypasses the UPS, feeding mains/utility power directly to the load. An activated
wrap-around maintenance bypass panel completely isolates the UPS and allows maintenance to be
performed - including a replacement of the entire UPS.
activated, this panel bypasses the UPS, feeding mains/utility power directly to the load. An activated
wrap-around maintenance bypass panel completely isolates the UPS and allows maintenance to be
performed - including a replacement of the entire UPS.