Rockwell Automation 1608M MegaDySC User Manual, 208 Volt, One Second Extended Runt - Manual (Page 24)

24 Rockwell Automation Publication 1608M-UM003A-EN-P - April 2014
Chapter 5 Operation
Figure 9 - Schematic diagram of Automatic Bypass Switchboard Power Circuit
Transient Voltage Surge
Suppressor (TVSS) Over voltage transient protection is provided on the output of the MegaDySC.
Indicator lights for each phase on the front of the TVSS panel (upper left
compartment of the Automatic Bypass Switchboard) are illuminated under
normal operation. In case of a severe over-voltage transient event, internal fuses in
the TVSS module may open. If TVSS operation is compromised, one or more of
the indicator lights will be extinguished. A form C contact is provided inside the
TVSS module for remote fault indication, if desired. Refer to the TVSS user
manual for details on accessing that contact. If a fault is indicated, the TVSS
disconnect fuse block (F14-F15-F16-F17) may be opened to allow servicing of
the TVSS module. Refer servicing to qualified personnel.
Troubleshooting Notes Refer servicing to qualified and factory authorized personnel. Opening the
MegaDySC cabinet door will shut down the MegaDySC system and force an
automatic mechanical bypass. Refer to manual bypass instructions to perform a
seamless transfer of power before opening the enclosure door for servicing.
WARNING: This enclosure contains energy storage devices. Dangerous voltages
may exist within this enclosure after AC power has been removed. Do not touch
any components within the enclosure if the red LEDs located above capacitor
banks are lighted. If the red LEDs do not extinguish within 5 minutes, close the
enclosure door and contact Technical Support.