1MRS 752264-MUM
Motor Protection Relay
Operator’s Manual
REM 610
29
• Lit indicator:
A protection stage has started or generated an alarm. The start and alarm
indication can be selected to be either latching or non-latching with the SGF
switches. A non-latching indication will automatically be cleared when the fault
has disappeared and the protection stage has been reset, whereas a latching
indication will remain lit until manually cleared.
• Blinking indicator:
Starting protection stages have been blocked by an external digital input signal.
The blocking indication is non-latching, i.e. it will disappear with the digital
input signal.
The yellow indicator LED will continue blinking for as long as a protection stage
remains blocked. The blocking indication will disappear with the digital input
signal or when the protection stage is no longer starting.
If a protection stage is blocked when other protection stages are starting, the
indicator will continue blinking. This because a blocking indication has a higher
priority than a starting indication.
3.3.1.3.
Red indicator LED
Fig. 3.3.1.3.-1 Red indicator LED
• Indicator off:
No protection stage has tripped.
• Lit indicator:
A protection stage has tripped. The trip indication is latching, i.e. it will remain
lit until manually cleared.
3.3.1.4.
Programmable indicator LEDs
In addition to the three fixed LEDs, the relay includes eight LEDs which you can
program to indicate the status of different type of relay signals. The programmable
LEDs can indicate the following information:
• Trip signals from protection stages
• Alarm signals from protection stages
• Motor status and restart inhibit status
• Status of the digital input signals
Rout the signals to the LEDs via switchgroups SGL1...SGL8; to LED1 with the
switches of switchgroup SGL1, to LED2 with those of SGL2, and so forth. Each
SGL consists of 20 alternative signals. For detailed information on the signals, refer
to the Technical Reference Manual.
The LEDs are non-latching by default but you can also set them to operate as
latching via switchgroup SGF5.
Red_a
