Figure 47 System Options - Liebert Static Transfer Switch 2 Installation, Operation & Maintenance Manual

Figure 47 System Options

Dual Output Breaker
This selection is set at the factory. The choice is set to YES to enable both output breakers (CB3 and
CB3A) when two are installed in the unit. If only one output breaker (CB3) is installed, the setting
is set to NO.
PDU
This selection is set at the factory. This setting allows the LCD to draw the Mimic accordingly and
display PDU specific metering and alarm information.
4 Pole Transfer Switch
This selection is set at the factory to indicate whether the system is a 3 pole or 4 pole unit.
Shunt
This selection is set at the factory.
Wye Output Transformer
The Wye Output Transformer controls the firing of the SCRs on startup, which minimizes the
inrush into PDU transformers. Output breakers and PDU input breakers have to be closed when
you start up the system. Based on whether the input side of the PDU transformer is configured as a
Wye or Delta changes the firing sequence of the SCRs.
If the STS2 is connected to a PDU configured as a Wye:
• Select YES for the Wye Output Transformer choice in the System Options dialog box.
Remote Source Selection
If your system is configured with the optional Remote Source Selection, it must be enabled from the
System Options menu. See 5.5 - Remote Source Selection Wiring on page 16 for more informa-
tion.
If the system is utilizing Remote Source Selection:
• Select YES for the Remote Source Selection choice in the System Options dialog box to activate
the option.
94 STS2 Touch Screen Display