Rockwell Automation Publication 1608M-IN002A-EN-P -January 2016
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MegaDySC Dynamic Voltage Sag Corrector
Applying Power
• After installation make certain there are no metal filings or any conductive debris in or on any components inside
the cabinets.
• Verify MegaDySC system voltage rating matches AC source voltage.
• Verify all input and output terminations including Grounding have been completed and properly tightened.
• Replace all covers. Close and lock all cabinet and switchboard doors.
• Allow commissioning technicians to complete connections and initial checks.
• Apply power from the upstream branch protection device when instructed to do so by the commissioning
technicians.
• After commissioning, follow instructions on the Automatic Bypass switchboard to put the system into Normal
mode. The load is now being protected by the MegaDySC. The display should show “OK” in the upper left corner
• Cycling input power in the sequence OFF--ON--OFF--ON within a one minute period will cause a ‘Limit Cycle
Timeout’ alarm. In such case sag correction will be disabled for one minute, after which the alarm will
automatically reset.
• Push Button ‘Close CBI’ is disabled for one minute after CBI is opened for any reason.
ATTENTION:
The MegaDySC system must be commissioned by factory-trained engineers. Do not energize the MegaDySC system until instructed to do so by
commissioning engineers. If the Automatic Bypass switchboard must be installed and energized before commissioning, follow instructions below
.
ATTENTION:
The MegaDySC and (optional) ER cabinets are interlocked. Opening cabinet doors while in the MegaDySC ‘normal’ mode will cause immediate
automatic bypass operation and subsequent loss of voltage sag protection while in ‘maintenance bypass’ mode. Automatic Bypass switchboard cabinet doors are
not interlocked and should be kept locked to avoid exposure to dangerous voltages.
ATTENTION:
For operation, display screen, and maintenance information, see MegaDySC Dynamic Voltage Sag Corrector User Manual,
Publication
