Specifications

5Symmetra PX 48, 96, and 160 kW 400 V and 100 kW 208 V Operation
Operation
Operation Modes
In an installation that does not include a maintenance bypass panel, the UPS has three operation modes.
If the installation includes a PDU, a PDU-XR, or an external maintenance bypass panel, maintenance
bypass operation also becomes available.
Normal operation
During normal operation, the UPS converts the utility/mains supply to conditioned power for the
connected load.
Battery operation
During battery operation, the UPS provides conditioned power to the connected load from its batteries
for a finite period. The UPS transfers to battery operation if the utility/mains power supply fails or is
outside pre-defined limits.
Static bypass operation
Static bypass operation is a feature that keeps the load supplied directly from the utility/mains supply
during different scenarios on the UPS or downstream from the UPS. In static bypass operation, the
utility/mains is supplying power to the connected load directly, bypassing all internal UPS functions.
Maintenance bypass operation (optional)
The UPS can be connected to a PDU, a PDU-XR, or an optional external maintenance bypass panel that
enables the user to bypass the UPS completely for maintenance purposes that might even include
replacement of the entire UPS. The connected load will then be fed directly from the utility/mains
supply, and there will in this case be no filtering of the supply or battery backup of the load.
Operation Procedures
Breakers in the system
Note: If the system does not contain a PDU or PDU-XR, the Q1, Q2, and Q3 switches and the
Q5 breaker should be located in an optional external maintenance bypass panel. See the
documentation included with the maintenance bypass panel for additional information.
Q1: UPS input Q3: Maintenance Bypass
Q2: UPS output Q5: Static Bypass input
(only in dual utility/mains systems)