Rockwell Automation 1608M MegaDySC User Manual, 208 Volt, One Second Extended Runt - Manual (Page 46)

46 Rockwell Automation Publication 1608M-UM004A-EN-P - April 2014
Chapter 7 Maintenance
If the upstream power is interrupted before CBI is opened the fast-discharge
circuit will not be triggered. In that case wait at least 30 minutes before opening
the MegaDySC cabinet doors to avoid exposure to charged capacitors. High
voltage remains on capacitors if the red LED indicators above the module
capacitor banks are lighted.
Fuses Fast-acting fuses are included to protect the MegaDySC system in the event of a
load-short circuit or other conditions. Fuses are located within the Automatic
Bypass switchboard cabinet, the MegaDySC cabinet and the optional ER storage
cabinet. To maintain protection of the MegaDySC system, fuses must be replaced
with the same or exact replacement type. Replacement fuses are available through
Rockwell Automation Technical Support and should only be replaced by
qualified and factory authorized service personnel.
Automatic Bypass Switchboard Fuses
Refer to the fuse listing label located on the switchboard cover for fuse size and
type. Before replacing a switchboard fuse authorized service personnel will
require removal of power to the Automatic Bypass switchboard by opening and
locking-out the upstream circuit breaker.
MegaDySC and ER Cabinet Fuses
A large label inside the MegaDySC door shows fuse locations. A similar label is
located within the ER storage cabinet. Fuse types are listed in
Table 11 . Before
replacing a MegaDySC cabinet fuse, factory authorized service personnel must
transfer the MegaDySC system to maintenance bypass mode. No attempt should
be made to service the MegaDySC if red LEDs located above the DC bus
capacitors are lighted.
WARNING: De-energize the Bypass switchboard before removing covers to
access fuses. Failure to comply with this warning can result in injury or death
WARNING: De-energize the MegaDySC electronics by placing the system into
Maintenance Bypass mode before opening the MegaDySC or ER cabinet doors
to replace any fuse.
WARNING: The MegaDySC has high voltage remaining up to 30 minutes after
disconnection from the AC line. Touching exposed or disconnected terminals,
cables or parts of the MegaDySC can lead to serious injuries or even death. Wait
for a minimum of 5 minutes before performing any service or testing on the
MegaDySC after power is removed. Keep doors closed until all internal LED
indicators are extinguished.
WARNING: Keep the cabinet doors closed to ensure proper cooling airflow and
to protect personnel from dangerous voltages inside the MegaDySC