ABB REM 610 Technical Reference Manual page 111

1MRS755537
Motor Protection Relay
Technical Reference Manual - ANSI Version
Unused RTD inputs are to be short-circuited separately.
Terminals X4.1/21-24 and X3.1/1-6 (optional) are digital input terminals, see
Table 5.2.1.-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 5.2.1.-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 5.2.1.-4.The trip signals from
the different protection elements are routed to the trip output 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...SO5 can be used for signalling on pickup and tripping of the
relay, see Table 5.2.1.-4.The signals to be routed to signal outputs SO1 and SO2 are
selected with the switches of 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 SO1 and SO2.
The IRF contact functions as an output contact for the self-supervision system of the
protection relay, see Table 5.2.1.-3. Under normal operating conditions, the relay is
energized and the contact is closed (X4.1/3-5). When a fault is detected by the self-
supervision system or the auxiliary voltage is disconnected, the output contact drops
off and the contact closes (X4.1/3-4).
Fig. 5.2.1.-1 and Fig. 5.2.1.-2 present a rear view of the relay, showing four
connecting sockets: one for measuring transformers, one for the optional RTD
module, one for power supply and one for optional serial communication.
REM 610 REM 610
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