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OPTIONS MENU ___________________________________________________________
This menu contains user adjustable operating modes, options and parameters. These are as follows.
PREFERED : SourceX
User can give priority to one of the input sources
OPTION DESCRIPTION
Source1
Source1 has higher priority. STS tries to transfer the load to Source1 under normal operating
conditions.
Source2
Source2 has higher priority. STS tries to transfer the load to Source2 under normal operating
conditions.
Press (+ or -) keys for selection and press enter key to apply the new preferred source selection.
If the preferred source fails, STS transfers the load to the alternate source.
RE-TRANSFER : On (or Off)
OPTION
DESCRIPTION
On
If preferred source failed by any reason load transfers to alternate source and retransfers to
preferred source after a delay (RET-DELAY)
Off
If preferred source failed load transfers to preferred source and load stays permanently on
alternate source after transfer from the preferred source (until alternate source fails ,if
alternate source fails STS retransfers the load to preferred source again)
Press (+ or -) keys for selection and press enter key to apply the new selection
RET-DELAY : 008sec
user can adjust re-transfer delay (how long the STS stays on alternate source). The
range of applicable delay is 1-60 seconds.
Press (+ or -) keys for adjustment and press enter key to apply the new value
OVLOAD : ENABLE (OR DISABLE)
user can select the overload behavior of the STS.
OPTION
DESCRIPTION
DISABLE
Electronic Overload protection feature is disabled, STS continues to supply the load
during overcurrents. The supply current is limited only by the input MCCBs ratings.
ENABLE
Electronic Overload protection is enabled, i.e. STS continues to supply the load with a
certain overload current for a certain period of time determined by the control software.
Press (+ or -) keys for selection and press enter key to apply new selection
ALR.HOLD: 010 sec
user can adjust the alarm hold time from this submenu. The adjustment range is 5 to 60
seconds. The current alarm stays on LCD panel as given time then if the alarm condition is normal STS clears
the alarm message from LCD panel.
Press (+ or -) keys for adjustment and press enter key to apply the new value
NSYNC.TR: (disable, delay, 0-curr)
User can select non synchronous transfer method of the STS. The unit
decides which kind of transfer method is applied when there is no synchronization between the two input
sources, Source 1 and Source 2. ,during transfer from preferred source to alternate source.
OPTION
DESCRIPTION
Disable
WARNING
Transfer is disabled when there is no synchronization. If preferred source failed during
non synchronous status output will be shutdown.
Delay
Non synchronous transfer is allowed only after a security delay. Delay time can be
adjusted by the service personnal from the ADJUST MENU.
0-curr.
If this mode is selected, during non synchronous transfer, STS waits for the output
currents to be zero and transfers to the alternate source.
Press (+ or -) keys for selection and press enter key to apply the new selection
Summary of Contents for InfoSTS
Page 45: ...44 Figure 28...
Page 47: ...NOTES...