ABB REU 513 User Manual page 9

ABB Substation Automation
Products and Systems
1MRS750886-MUM
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 SGF3/1, 3, 5 and 7.
A non-latching type of indication is automatically switched off when the fault
disappears and the protection stage resets.
A latching type of indication remains lit although the fault disappears 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 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 remains 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 can be selected to be
latching or non-latching with switches SGF3/2, 4, 6 and 8.
A non-latching type of indication goes automatically off when the fault
disappears and the protection stage resets.
A latching type of indication remains lit, although the fault disappears, until
cleared by pressing the [C] button or via serial communication. As long as the
protection function is active it is not possible to reset the trip indicator.
Further, the indicators may be reset via the 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.
REU 513
9