1MRS751802-MUM
REX 521
63
Protection Relay
Technical Reference Manual, Standard Configurations
4. Reading of the overview diagrams of the signal
routings
The signals in a standard configuration can be programmed to perform various
functions. Digital inputs can be connected to the different input signals (for example
Blocking 1) by using selectors. Input signals can be routed to output relays (for
example HSPO1) directly or they can be connected via the input switchgroups to
inputs of the function block in order to perform different kinds of functions. This is
done by setting the value of the input switchgroups.
Output signals of the function blocks can be connected to the output relays by first
selecting the needed output signals from the function blocks, for example, Trip 1
(3I>, 3I>> and so on) by the output switchgroups and then connecting the selected
group of signals to the dedicated output relays by setting the Output signal
selector.
Analogue signals are connected to the corresponding protection and measurement
function blocks. Analogue signals are not presented in the overview diagrams of the
signal routings.
Fig. 4.-1 Main principle of the overview diagrams of the signal routings
4.1. Digital inputs
Digital inputs (DI1...DI9) can be connected to the inputs of the function block in
order to obtain different functionalities. For example, digital inputs are used for
performing blocking of protection, external triggering of disturbance recorder and
local control.
Any of the digital inputs (DI1...DI9) can be programmed from menu selection to
invert the signal and to set the predelay (filtering). For more information, refer to
section “Digital inputs” in
Technical Reference Manual, General
(see Section 1.5. Related documents).
The routings between the digital inputs and different functionalities are set with
selectors and switchgroups (SWGRP) for each functionality respectively. Settings
are done with the Human-Machine Interface (HMI) or with the Relay Setting Tool.
PREDELAY
INVERSION
DI1
.
.
.
DI9
Digital
inputs
Reset 1
Reset 2
Group
Blocking 1
.
.
.
etc.
Master trip
Input
Signals
Selectors
Input
SWGRP
BS1 3I>
BS1 3I>>
BS1 3I>>>
BS1 Io>->
BS1 Io>>->
BS1 Io>>>>->
BS1 Iub
Blocking 2
etc.
Blocking 1
Output
SWGRP
3I>
3I>>
3I>>>
Io>-->
Io>>-->
Io>>>-->
Iub>
3Ith>
Tri p 1
Tri p 2
etc.
Output
signals
HSPO1
PO1
PO2
PO3
.
.
.
Tri p 2
Tri p 1
etc.
Selectors
PO1
PO2
.
.
.
etc.
Output
relays
DigitalOutputs
Function
block
3I>
CBFP
BS1
BS2
GROUP
RESET
START
TRIP
CBFP
3I>>
CBFP
etc.
External trip
HSPO 1
To Next Page
Loading...
