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559E1200.indd
version: 1.0
Functions and
characteristics
Operating-assistance functions
Micrologic 5 / 6 A or E trip units
Personalised alarms with time-stamping
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Alarm types
The user can assign an alarm to all Micrologic A or E measurements or events:
up to 12 alarms can be used together:
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Micrologic 5: overload (Ir)
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Micrologic 6: overload (Ir) and ground fault (Ig)
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thresholds, priorities and time delays can be set for ten other alarms.
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the same measurement can be used for different alarms to precisely monitor
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certain values, e.g. the frequency or the voltage
alarms can also be assigned to various states: phase lead/lag, four quadrants,
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phase sequence
selection of display priorities, with pop-up possibility
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alarm time-stamping.
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Alarm settings
Alarms cannot be set via the keypad or the FDM121 display unit. They are set via
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before display and deactivation delay. It is also possible to reprogram the standard
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Alarm reading
Remote alarm indications
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Histories and event tables
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Micrologic A and E have histories and event tables that are always active.
Three types of time-stamped histories
Tripping due to overruns of Ir, Isd, Ii, Ig: last 17 trips
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Alarms: last 10 alarms
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Operating events: last 10 events
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Each history record is stored with:
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time-stamping: date and time of event
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status: pick-up / drop-out
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Two types of time-stamped event tables
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Display of alarms and tables
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communication system.
Embedded memory
Micrologic A and E have a non-volatile memory that saves all data on alarms,
histories, event tables, counters and maintenance indicators even if power is lost.
Maintenance indicators
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Micrologic A and E have indicators for, among others, the number of operating
cycles, contact wear and operating times (operating hours counter) of the Compact
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It is possible to assign an alarm to the operating cycle counter to plan maintenance.
The various indicators can be used together with the trip histories to analyse the
level of stresses the device has been sub
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The information provided by the indicators cannot be displayed on the Micrologic
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Management of installed devices
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communication system:
serial number
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hardware version
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device name assigned by the user.
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This information together with the previously described indications provides a clear
view of the state of the installed devices.
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Overpower alarm.
Phase unbalance alarm.
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Alarm pick-up and drop-out.
Examples of operating-assistance screens on the FDM121
display unit.
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Micrologic built-in LCD display.
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FDM121 display: navigation.
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