ABB REM 610 Technical Reference Manual page 100

REM 610
100
Motor Protection Relay
Technical Reference Manual
Note!
Unused RTD inputs are to be short-circuited separately.
Note!
REM 610 is provided with connection socket X3.1 only if the optional RTD module
has been installed.
Terminals X4.1/21-24 and X3.1/1-6 (optional) are digital input terminals (see table
4.2.1-5). The digital inputs can be used to generate a blocking signal, to unlatch
output contacts or for remote control of relay settings, for instance. The requested
functions are selected separately for each input in switchgroups SGB1...5. The
digital inputs can also be used to trigger the disturbance recorder; this function is
selected with SPA parameter V243.
The auxiliary voltage of the relay is connected to terminals X4.1/1-2 (see table
4.2.1-2). At dc supply, the positive lead is connected to terminal X4.1/1. The
permitted auxiliary voltage range of the relay is marked on the front panel of the
relay under the handle of the plug-in unit.
Output contacts PO1, PO2 and PO3 (restart disable) are heavy-duty trip contacts
capable of controlling most circuit breakers (see table 4.2.1-4). The trip signals
from the different protection elements are routed to the power outputs with the
switches of switchgroups SGR1...SGR3. On delivery from the factory, the trip
signals from all the protection elements except 49/38-1 and 49/38-2 are routed to
both PO1 and PO2 and the restart disable signal to PO3.
Output contacts SO1 and SO2 can be used for signalling on pickup and tripping of
the relay (see table 4.2.1-4). The signals to be routed to signal outputs SO1 and SO2
are selected with the switches in switchgroups SGR4 and SGR5. On delivery from
the factory, the pickup and alarm signals from all the protection elements except 49/
38-1 and 49/38-2 are routed to both SO1 and SO2.
The IRF contact functions as an output contact for the self-supervision system of the
protection relay (see table 4.2.1-3). Under normal operating conditions the relay is
energized and the contact closed (X4.1/3-5). When a fault is detected by the
self-supervision system or the auxiliary voltage is disconnected, the output contact
will drop off and the contact close (X4.1/3-4).
Fig. 4.2.1.-1 and Fig. 4.2.1.-2 present a rear view of REM 610, showing four
connecting sockets: one for measuring transformers, one for the optional RTD
module, one for power supply and one for optional serial communication.
1MRS 755537