APC Rack Automatic Transfer Switch, 12A, 230V SU043 User Manual

Storage

APC

 recommends the factory default settings 

among the settings shown below.

Source 

A

 

Sensitivity

Bright= Normal

Dim (the factory 
default) = Reduced

Off = low 

Sets transfer 
sensitivity to line 
conditions

Source 

B

 

Sensitivity

Source 
Preference

Bright = Source 

A

 

(the factory default) 

Dim = Source 

B

Off = none

Selects the preferred 

AC

 source

Source 

A

 

Xfer 
Voltage

Bright = Narrow

Dim = Medium (the 
factory default

Off = Wide

Sets the transfer 
voltage window (the 
range of acceptable 
voltage)

Source 

B

 

Xfer 
Voltage