Rockwell Automation 1608M MegaDySC User Manual, 800 Amp - 208V - Manual (Page 26)

26 Rockwell Automation Publication 1608M-UM003A-EN-P - December 2013
Chapter 5 Operation
whenever the MegaDySC system is in the maintenance bypass mode (CBB
closed and CBI open).
A list of conditions and indications is given in Table 1 . Refer to Chapter 6 for
further information on system alarms and status display.
Table 1 - Operational Conditions and Indications
* The touchscreen will power down if both input and output voltages fall below approx. 75% of nominal
**An error message will be displayed while the red or orange text box is displayed. Refer to Chapter 6 for further information on accessing
fault codes and status history.
Automatic Bypass
Switchboard Operation The Automatic Bypass Switchboard consists of a bypass circuit breaker (CBB),
an input circuit breaker (CBI), and an output circuit breaker (CBO). Under
normal operating conditions raw input power is routed through CBI to the input
of the MegaDySC. The output of the MegaDySC is routed to the load through
CBO. CBB is normally open. CBB connects utility power to the load, bypassing
the MegaDySC, when operating in the maintenance bypass mode.
Refer to page 27 for descriptions of the automatic bypass modes
CONDITION DEFINITION Touchscreen Display STATUS text* INVERTER OPERATION BYPASS MODE
Normal: 88.5% < V
LINE
< 110% Green “OK” Standby Static BP
Sag Event:
V
LINE
< 88.5% for less than available
runtime.
Green “OK” Running Inverter
Runtime Exceeded: Cumulative runtime exceeded
Blinks Red, then Orange for 1 min. Repeats
is condition persists
Inhibited Static BP
Normal Mode, Overload: Load current > 110%
Red during OL condition,
Orange for 1 min. after OL ends
Inhibited Static BP
Inverter Run Mode, Output
Overcurrent: (I
2
t)
Load current > 150% for 3 cycles
Blinks Red, then Orange for 1 min. Repeats
is condition persists
Inhibited Static BP
Inverter Module Over-
temperature
Module temperature limit exceeded Blue, MegaDySC offline Disconnected Mech. Bypass
MegaDySC Over-temperature Internal temperature limit exceeded Blue, MegaDySC offline Disconnected Mech. Bypass
Static Switch Failure Open SCR(s) Blue, MegaDySC offline Disconnected Mech. Bypass
Main Fuse Open Open Fuse(s) Blue, MegaDySC offline Disconnected Mech. Bypass
Enclosure Door Open Door Open Blue, MegaDySC offline Disconnected Mech. Bypass
WARNING: Dangerous voltages can still exist within the MegaDySC enclosure
even if the system is in bypass mode. Refer servicing to qualified personnel.