DSE Model 7560 ATS and Mains Controller Operators Manual
057-017 7560 OPERATING MANUAL ISSUE 10.2 10/02/09 AM 43
7.2 ELECTRICAL TRIPS
Electrical trips are latching, and open the bus breaker. The alarm must be accepted and cleared,
and the fault removed to reset the module.
MAINS REVERSE POWER, if the module detects a mains reverse power in excess of the pre-set
trip level and time delay, an electrical trip is initiated. The LCD will indicate ‘MAINS REVERSE
POWER’ and the COMMON ALARM LED will flash.
AUXILIARY INPUTS, if an auxiliary input has been configured as an Electrical Trip the appropriate
LCD message will be displayed and the COMMON ALARM LED will flash.
MINIMUM SETS NOT REACHED, if the minimum number of sets are not synchronised on to the
bus, prior to the common bus breaker closing, an electrical trip is initiated. The LCD will indicate
‘MIN. SETS NOT REACHED’ and the COMMON ALARM LED will flash.
BUS FAILED TO CLOSE, if the bus breaker fails to close, an electrical trip is initiated. The LCD will
indicate ‘BUS FAILED TO CLOSE’ and the COMMON ALARM LED will flash.
BUS FAILED TO OPEN, if the bus breaker fails to open, an electrical trip is initiated. The LCD will
indicate ‘BUS FAILED TO OPEN’ and the COMMON ALARM LED will flash.
INSUFFICIENT CAPACITY, if the module is configured for Mains CT and the load levels are so high
that the generator is unable to supply enough load to maintain the configured mains level, insufficient
capacity will be displayed and the COMMON ALARM LED will flash. The generator will provide
100% of its capacity and the loading on the mains will increase.
MAINS REVERSE POWER, if the module is configured for Mains CT and the amount of power
being exported to the mains supply is above the setting for the ‘export power level alarm’ then mains
reverse power is displayed and the COMMON ALARM LED will flash.
OLD UNITS ON BUS, if the module detects that there is one or more 7560 controllers connected to
the MSC link that are not compatible with the module (for example earlier versions not supporting
multiple mains supplies), Old units on bus is displayed and the COMMON ALARM LED will flash.
FAILED TO SYNCHRONISE, if the module cannot synchronise within the time allowed by the
Synchronising timer a warning is initiated. The LCD will indicate ‘FAILED TO SYNC’ and the
COMMON ALARM LED will illuminate.
MSC TOO FEW SETS, if the 7560 detects that the number of generator sets connected module
cannot synchronise within the time allowed by the Synchronising timer a warning is initiated. The
LCD will indicate ‘FAILED TO SYNC’ and the COMMON ALARM LED will illuminate.
PRIORITY SELECTION ERROR, if the 7560 detects that two or more 7560 controllers share the
same priority number, an electrical trip is initiated. The LCD will indicate ‘PRIORITY SELECTION
ERROR’ and the COMMON ALARM LED will illuminate.
BUS PHASE SEQUENCE WRONG, if the module detects a bus phase rotation error, an electrical
trip is initiated. The LCD will indicate ‘BUS PHASE SEQ WRONG’ and the COMMON ALARM LED
will illuminate.
MAINS PHASE SEQUENCE WRONG, if the module detects a mains phase rotation error, an
electrical trip is initiated is initiated. The LCD will indicate ‘MAINS PHASE SEQ WRONG’ and the
COMMON ALARM LED will illuminate.
