Basler Electric BE1-51/27C - Manual (Page 20)

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output relay is de-energized and the output contacts close. Shorting bars across the output contacts are
held open by the installed connection plug. When the relay is removed from service by removing the
connection plug, the shorting bars are closed.
Target Indicators
Target indicators are optional components selected when a relay is ordered. The electronically latched
and reset targets consist of red LED indicators located on the relay front panel. A latched target is reset
by operating the target reset switch on the front panel. If relay operating power is lost, any illuminated
(latched) targets are extinguished. When relay operating power is restored, the previously latched targets
are restored to their latched state.
A relay can be equipped with either internally operated targets or current operated targets.
Internally Operated Targets
The relay trip outputs are directly applied to drive the appropriate target indicator. Each indicator is
illuminated regardless of the current level in the trip circuit.
Current Operated Targets
A current operated target is triggered by closure of the corresponding output contact and the presence of
at least 200 milliamperes of current flowing in the trip circuit.
Note that the front panel function targets (TIMED, INST 1, etc.) may be either internally or current
operated. Phase and neutral indicators are current operated only if the instantaneous options are not
included and if current operated targets are specified.
Note
Prior to August 2007, BE1-51/27C target indicators consisted of
magnetically latched, disc indicators. These mechanically latched
target indicators have been replaced by the electronically latched LED
targets in use today.
Functional Description BE1-51/27C