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REJ 513
8
User's Guide
Yellow START indicator
• Indicator off:
Normal operation mode. No protection function has started.
• Lit indicator:
A protection function has started. The start indication can be selected to be
latching or non-latching with switches SGF2/4...5. The latching/non-latching
setting for the protection function last started or tripped determines whether the
start indication will be latching or non-latching.
A non-latching type of indication is automatically switched off when the fault
disappears (the protection stage resets).
Although the fault disappears, a latching type of indication remains lit until cleared
by pressing the [C] button.
• Blinking indicator:
Started protection functions are blocked by an external binary input. The blocking
indication is non-latching, i.e. it disappears with the external binary input signal.
The start LED goes on blinking as long as a protection function (or stage) of the
relay is blocked. The blocking indication disappears when the binary input signal
is removed or when the protection function in question is no longer started. Should
the function still be started when the binary input signal is removed, the start
indication will be activated.
If a protection function is blocked when other protection functions are started but
not blocked, the indicator will remain blinking (blocking has a higher priority than
starting).
Red TRIP indicator
• Indicator off:
Normal operation mode. No protection function has tripped.
• Lit indicator:
A protection function has tripped. The trip indication is latching, i.e. the trip
indication must be reset by pressing the [C] button (or via serial communication).
Further, the indicators may be reset via the external binary input X2.1/17-18 by
applying control voltage to the input, provided that switches SGB1/1...3 are in
position 1.
The basic protection relay functions do not depend on the state of the operation
indicators, reset or non-reset. The relay is permanently operative.
ABB Substation Automation
Products and Systems
1MRS750613-MUM
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