Eaton Static Transfer Switch 2000A 3-Pole Installation and Operation Manual 164001127—Rev 01 79
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Once configured, the STS requires few operator interventions. The following procedures cover the main
interventions.
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Initial startup is covered in 5.1.3 Commissioning: Initial Power-up Site Test. If power rework has been
performed upstream of the STS, follow steps 2-4 of this procedure to verify correct input power to the STS.
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Powering up the STS for normal operation can be done as follows:
1. The STS should be left in Normal mode configuration for MCCBs and MCSWs as shown in Figure 6,
Normal Mode MCCB/MCSW Configuration.
2. Apply power to the STS externally by closing circuit breakers feeding the unit.
1144..33 RReessttaarrttiinngg tthhee MMoonniittoorr
When the Ethernet settings are changed on the Settings screen (11.2 Ethernet), the Monitor must be
restarted. Because the Monitor logic controls transfers, the STS must briefly be put in Redundant Mode to
provide a backup transfer capability to the Monitor:
1. On the Home screen, make note of the existing parameters, particularly Preferred Source and the actively
conducting source as indicating by the yellow line on the One-line display.
2. Use the STS key to open the left-side doors in front of the display. Open the ROI panel.
3. On the ROI, set the MODE OF OPERATION toggle switch to REDUNDANT mode.
4. Login on the Home page as Administrator or other higher level authorization.
5. In the navigation buttons, touch the Setup button to display the Settings screen.
6. In the Ethernet Settings panel, touch the Restart button to restart the Monitor. Touch the button just
once: the restart will take around 30-45 seconds and it is not immediately apparent that the restart is
proceeding.
7. When the Home screen reappears, do a visual check of Monitor parameters and settings for correctness:
a. On the dynamic One-line display, verify that the currently conducting source matches the source
indicated by yellow line.
b. Verify that the Preferred Source selector is selecting the currently conducting source. (If the
Preferred Source selector is not the current source, it will force a transfer when you return to
NORMAL mode.)
c. If the Preferred Source is not the currently conducting source, login on the Home screen with at least
operator-level authorization and set the Preferred Source selector to the source recorded in step 1.
8. After validating the Monitor, at the ROI set the MODE OF OPERATION toggle switch to NORMAL mode.
9. Close and lock the STS doors.
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If the Monitor fails to transfer the load, the SAS board will take over the transfer. If Alarms appear showing the
SAS board in control, follow these steps:
1. Check the Alarms page for alarms showing the SAS board is in control.
2. Login on the Home page as Administrator or other higher level authorization.
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