Protection Relay Targets; How To Acknowledge And Reset Targets, Output Contacts And Memorized Values; Target Leds; Green Target Led - ABB REM 610 Operator's Manual

REM 610 REM 610
4.2.2.4.
4.3.
4.3.1.
4.3.1.1.
38
Motor Protection Relay
Operator's Manual - ANSI version
How to acknowledge and reset targets, output contacts and
memorized values
To clear the LEDs and the display, press
*
cleared only if the fault has disappeared.
To unlatch the output contacts, press
*
LEDs and the display have to be cleared before this.
Press and simultaneously for at least half a second to perform a master
*
reset, that is, to clear targets and memorized values and to unlatch the output
contacts. The display being inverted confirms this action. Memorized values
include recorded data, disturbance recorder data and average values (demand
values and history data values, except for the running time).

Protection relay targets

The operation of the relay can be monitored by means of three different HMI
targets:
Three target LEDs with fixed functionality:
*
Ready
*
Pickup/Alarm
*
Trip
*
Eight programmable target LEDs
*
Text message on the display
*
The protection functions are not affected by fault targets.

Target LEDs

When a protection element picks up or generates an alarm, the yellow target LED is
lit.
When a protection element trips, the yellow target LED remains lit and the red target
LED is lit.
When a picked up protection element is blocked, the yellow target LED starts to
flash. The yellow target LED is also lit to indicate an alarm from a protection
element.

Green target LED

Fig. 4.3.1.1.-1 Green target LED
Two different functions are embedded in the green target LED: power on and
internal relay fault (IRF).
. The LEDs and the display are
for at least five seconds. Note that the
1MRS755538
A040264