Rockwell Automation 1608M MegaDySC User Manual, 400 A - Manual (Page 26)

26 Rockwell Automation Publication 1608M-UM001A-EN-P - September 2013
Chapter 5 Operation
protect the inverter module from peak over currents during sag protection
operation.
Each of CBB, CBI, CBO contains an electronic trip unit with adjustable "Short
Delay Pickup." These are factory-set to CBI: 7, CBB: 8 (max.), CBO: 8 (max.)
Diagnostic Indicators
Diagnostic indicators available on the MegaDySC system:
• Touchscreen display on the door of the MegaDySC enclosure.
• Red lamp on Bypass enclosure indicates mechanical bypass is closed
when lit.
• Circuit breaker status (OPEN or CLOSED)
• Remote contacts and RS-232 serial communications port
Open circuit alarm conditions:
1. Open static switch (failure in static switch path)
2. Open main input fuse (F1-F2-F3)
3. Overload of static switch (may cause over-current trip in CBI; see
Specifications)
4. Over-temperature of static switch heatsink
5. Over temperature of MegaDySC cabinet ambient air
6. Open cabinet door
NOTE: Alarm types 1, 2, and 3 may result in momentary interruption of power to the load before
transferring to mechanical bypass. Types 4 through 6 will result in a seamless transfer to
mechanical maintenance bypass, without interruption.
IMPORTANT In the event of the operation of any over current protection function, check the
touchscreen display on the MegaDySC for error codes that may indicate the
type of over current condition.
ATTENTION: Circuit Breaker settings must not be changed without consulting
Technical Support.
IMPORTANT Record any Alarm or System Event messages seen on the display before
contacting Technical Support