3.1.2 Single UPS - switching to System Bypass
With the system running in the selected operating mode, press the On/Off button (see Figure 3.1 on the previous page) to
return to bypass mode. Enter the passcode in the pop-up and then press Stop in the control pop-up to stop the inverter.
Return to “System in bypass."
Under these conditions the load is supplied by the bypass, and all automatic functions, including battery operation, are
disabled.
3.1.3 Parallel UPS System - switching to Automatic operating mode
With all systems in bypass, press the On/Off button (see Figure 3.1 on the previous page) on each of the UPS units in the
parallel system and follow the same procedure as a Single UPSto switch them to the automatic operating mode.
All the UPS units will start in the VFI mode and remain in this condition for a predetermined period, during which time the
relevant electrical characteristics are monitored. At the end of this period, which may last for several days depending on the
conditions being measured, Trinergy™ Cube selects the operating mode that will supply the load as efficiently as possible
without negatively affecting electrical characteristics such as power factor and current distortion.
3.1.4 Parallel UPS System - switching to System Bypass
With the system running in the selected operating mode, press the On/Off button (see Figure 3.1 on the previous page) on
each UPS unit in the parallel system and follow the same procedure as the Single UPSSystem to switch them to system
bypass.
The UPS will switch to the “System in bypass” condition only when all the STOP buttons have been pressed.
Under these conditions the load is supplied by the bypass, and all automatic functions, including battery operation, are
disabled.
3.2 Manual Operations—All Systems
The Trinergy Cube is designed to function unattended by an operator. The system control logic automatically handles many
important functions. Other procedures must be performed manually.
Manual procedures available to the operator include startup, load transfers and shutdowns. These are performed with the
touchscreen and some manually operated circuit breakers and switches.
This section lists typical step-by-step instructions.
• Startup—Including initial startup, recovering from input power failure, recovering from DC source shutdown
and recovering from shutdowns for emergencies or maintenance.
• Load Transfers—Including transfers from UPS to bypass and retransfers from bypass to the UPS system.
• Maintenance Bypass Load Transfers—Including transfers from internal bypass to maintenance bypass and
transfers from maintenance bypass to internal bypass.
• Shutdowns—Including module shutdowns for maintenance and emergency shutdowns.
The following figures illustrate several of the possible maintenance bypass configurations for Trinergy Cube systems.
3 Operation
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