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REJ 523
4.1.10
4.2
4.2.1
48
Technical Reference Manual
Relay parameterization
Local parameterization
The parameters of the relay can be set either locally via the MMI or externally via
serial communication with the Relay Setting Tool. When the parameters are set
locally the setting parameters can be chosen from the hierarchical menu structure. The
desired language for parameter description can be selected. Refer to "Operator's
Manual".
External parameterization
The Relay Setting Tool is used for parameterizing the relay units. The parameters can
be set off-line in a PC and downloaded to the relay over a communication port. The
views for parameterization included in the Relay Setting Tool menu structure are the
same as the views on the technical level of the local MMI.
Design description
Input / output connections
All external circuits are connected to the terminals on the rear panel of the relay.
Terminals X1.1-_ are dimensioned for one 0.5...6.0 mm
wires and terminals X2.1-_ for one 0.08...2.5 mm
The energizing currents of the overcurrent unit are connected to terminals X1.1/1-2,
X1.1/4-5 and X1.1/7-8 when the rated current of the CT secondary circuits is I
When the rated current of the CT secondary circuits is I
X1.1/4-6 and X1.1/7-9 are used. The relay can also be used in single-phase or two-
phase applications by leaving one or two energizing inputs unoccupied.
The binary input X2.1/17-18 can be used in three different ways: 1) as the binary
input for an external blocking signal, 2) as the binary input for unlatching the trip
relay, or 3) as the binary input for the remote control of relay settings. The requested
function is selected with the switches of switchgroup SGB. The binary input can also
be used as a trigger signal for the disturbance recorder; this function is selected with
SPA parameter V243.
The auxiliary supply voltage of the relay is connected to terminals X2.1/1-2. At dc
supply the positive lead is connected to terminal X2.1/1. For further details, see the
description of the auxiliary voltage. The permitted auxiliary voltage range of the relay
is marked on the front panel of the relay.
ABB Substation Automation
Products and Systems
2
wire or for two max 2.5 mm
2
wire or for two max 1.5 mm
= 1 A, terminals X1.1/1-3,
n
MRS750940-MUM
2
2
wires.
= 5 A.
n
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