S&C Instruction Sheet 663-590
7
Table 1
Table 1. Inspection Procedures for Pad-Mounted Gear Equipped with
Micro-AT Source-Transfer Control
① —
Continued
Item
Procedures
Optional overcurrent-
lockout feature (catalog
number suffix “-Y2”)
1 . If the test keys are not enabled, press the <Test> menu key . Then press the <Last> item key . The
Enable Test Keys item will
appear on the display . Press the <Change> key and select On mode by pressing the <Enter> key . The test keys are now enabled
for 15 minutes .
2 . Place the MANUAL/AUTOMATIC operation selector switch on the Micro-AT in the
Automatic position and simulate a fault
cleared by feeder fuses by momentarily pressing the <Overcurrent> key for the preferred source . Verify that the LOCKOUT lamp
lights for a period equal to the lockout-reset time delay programmed into the Micro-AT control .
3 . Now, simulate a lockout resulting from a fault cleared by a source-side protective device . To accomplish this, press the
<Overcurrent> key for the preferred source and confirm the LOCKOUT lamp lights . Then, press and hold in the associated <Loss
of Voltage> key . Release the <Loss of Voltage> key when the preferred-source operator opens, and verify the alternate-source
operator remains open and locked out .
4 . Return the MANUAL/AUTOMATIC operation selector switch to the
Manual position and press the <Reset> key to cancel the
lockout condition . Confirm that the LOCKOUT lamp extinguishes . Then, close the preferred-source operator by pressing the
appropriate CLOSE pushbutton .
Event log
1 . Press the <Event> menu key . Then, press the <Next> item key . The date, time, and event ID for the last control operation will
appear on the display . Confirm the event ID on the display is “218” (enter manual-software) . Press the <
←
> key to view the
earlier event, and confirm the event ID on the display is “11” (local to manual control) .
2 . To view the event IDs for earlier or later control operations, press the <
←
> or <
→
> key respectively . The event IDs that appear
on the display will vary depending on system conditions and programming of the Micro-AT control .
3 . When no additional items are to be reviewed, press the <Quit> key . Confirm the EVENT lamp extinguishes .
Before leaving the
gear…
So the Micro-AT control is ready for automatic operation when leaving the site, perform the following:
1 . Press the <Quit> key .
2 . With the MANUAL/AUTOMATIC operation selector switch in the
Manual position, recouple both operators to their associated
Mini-Rupter Switches .
3 . Place the MANUAL/AUTOMATIC operation selector switch in the
Automatic position .
4 . Confirm both source voltage lamps and the READY lamp are illuminated . (If the READY lamp is not lit, refer to the display on the
control . When not being used to show menu information, this display shows messages explaining why the lamp is not lit .)
5 . Close and padlock all doors .
①
If the source-transfer pad-mounted gear being inspected does not oper-
ate as indicated in these inspection recommendations, refer to the Micro-AT
troubleshooting guide, S&C Instruction Sheet 515-520 . If further assistance
is needed, contact the nearest S&C Sales Office . Have the complete catalog
number of the gear, date of shipment (as shown on the nameplate), operat-
ing characteristics, and voltage-, current-, and time-related operating param-
eters available for reference .
