Basler Electric BE1-51 User Manual
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9137200997 Rev G
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 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target indicators have been replaced by the electronically latched LED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