Disturbance Recorder Indication - ABB REM 610 Operator's Manual

Motor protection relay

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1MRS 752264-MUM

3.3.2.2.

Motor Protection Relay

Operator's Manual

indicator LEDs. The text message for the restart inhibit state is non-latching,

whereas the status indication via a programmable LED can be either latching or non-

latching.

The restart of a motor can be inhibited by the thermal protection, the cumulative

start-up time counter or an external digital input signal. For the priority of

indications for the restart inhibit state; refer to section Priority of operation

indication messages.

RESTART INHIBIT

tsi

Fig. 3.3.2.1.-4 Restart inhibit indication

Latching and non-latching indications

A latching operation indication message will remain on the display until manually

cleared or until replaced by a message of higher priority. However, if the fault is

stable and has not disappeared, the operation indication message and the LED(s) will

not be cleared. An operation indication generated by a non-latching start will

automatically be cleared when the stage is reset.

Priority of operation indication messages

The messages on the display have a certain priority order. If different types of

indications are activated simultaneously, the message with the highest priority will

appear on the display.

The priority order of the messages:

1. CBFP

2. Trip

3. Start/Alarm

4. Restart inhibit

4.1. Thermal protection

4.2. Cumulative start-up time counter

4.3. External restart inhibit

When several protection stages generate starts or alarms, the last start/alarm

indication message will be displayed. When several protection stages trip, the first

trip indication message will be displayed until the time, as specified by the NEW

TRIP IND. setting value, has expired. After this, a new trip indication message

can displace the old one. A hidden trip indication message can be brought forward

by pressing