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LEGEND (Diagram below)
1.
System One-Line Diagram and Status Indication:
LED indication of source voltages live (green) or dead (red),
and switch open and closed position indications.
2.
Timing Selector Switches: Configurable individual
initial transfer and return transfer delay timers help to
coordinate with allowable distribution voltage variances.
3.
Operation Mode Selector: Manual mode deactivates
the auto transfer logic and operations, while auto mode activates
it. The test mode is used for commissioning or routine checks
of the ATC. Local mode deactivates all remote SCADA operations,
while remote mode activates SCADA operations.
4. Manual Mode Controls: Local operator
can use the toggle switch/push buttons to open and close source
switches 1 and 2.
5.
Generator Settings: Either source may be programmed
to be a generator. The user selects the generator source
and the cool down time.
6. Auto Mode Logic Settings: The user programs
a primary-selective system – by choosing source 1 or 2 as
the preferred source; or a non-preferred system, which blocks
automatic return transfers. Initial and return transfer
sequences are programmed as either open transition (open-before-close),
or a closed transition (close-before-open) sequence. The
paralleling sources parameter is set to either permit or to
prohibit source 1 and source 2 switches from being closed
at the same time (sources paralleled).
7.
ATC Status: LEDs provide an easy reference for
system operating conditions. The operator can easily determine
if the control is ready for ATC transfers, if the AC and DC
power supplies are adequate, or if there is an error condition.
Overcurrent and actuator faults are reset with manual push
buttons.
8. Test Functions: Push buttons simulate
loss of voltage for both source 1 and 2, an overcurrent condition,
and a low dielectric alarm.
9.
Lamp Settings: Toggle switch turns LED lamps on
or off, or performs a momentary test of LED function.
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