ABB RELION REX640 Technical Manual page 1371

1MRS759142 C
Table 1316: Status indication for a three-position switch with auxiliary contacts in direct control mode
Status Inputs
POSITION DCPOSCL
OSE
Disconnector 1
closed
Disconnector 0
intermediate
Both open 0
Earthing 0
switch
intermediate
Earthing 0
switch closed
Faulty 0
Faulty 0
Faulty 1
Faulty 1
Faulty x
x = no difference
1) REED input has been detected as closed within time-out and earthing switch is indicated as closed.
2) REED input has not been detected as closed within time-out and faulty position is indicated.
REX640
Technical Manual
Be aware of the physical switch type and corresponding connections
in Application Configuration, both for P3SXSWI and in RIO600
SCM, if used. A wrong connection according to the physical switch
type can cause misleading position indication.
In certain three-position switches an additional reed contact is available to indicate
safe earthing. The contact is TRUE only when the earthing switch is in closed position.
The reed contact is given a short time window to confirm closed earthing switch
position, in case of vibrations. If the earthing switch has closed but the reed contact
does not close within the time window, faulty position is reported.
Table 1315: Reed contact detection
Control mode
Direct control
With RIO600 SCM
The state of the switch is indicated at outputs DCCLOSE_POS, DCOPEN_POS,
ESCLOSE_POS and ESOPEN_POS together with the OKPOS information.
Debouncing and short disturbances in an input are eliminated by filtering. The binary
input filtering timer can be adjusted separately for each digital input used by the
function block. The reporting of faulty or intermediate position of the apparatus
occurs after the Event delay setting.
DCPOSOP ESPOSCL ESPOSOP
EN OSE EN
0 0 1
0 0 1
1 0 1
1 0 0
1 1 0
1 1 0
1 1 1
1 0 1
x 1 x
0 x 0
Reed contact detection
The availability of the reed contact needs to be set through the
Reed contact setting by setting it as "Available". The reed
contact signal is connected at input REED.
Reed detection is handled externally by the module. The input
ESPOSCLOSE is not indicated TRUE by RIO600 if reed contact
closing is not detected. Therefore, unsecure earthing is
reported to input REED_ERR so that P3SXSWI can indicate
faulty position in this control mode.
Outputs
REED DCCLOSE DCOPEN_
_POS POS
x 1 0
x 0 0
x 0 1
x 0 1
0 1
1)
1
0 1
2)
0
x 0 1
x 0 0
x 0 0
x 0 0
Section 9
Control functions
ESCLOSE ESOPEN_ OKPOS
_POS POS
0 1 1
0 1 0
0 1 1
0 0 0
1 0 1
0 0 0
0 0 0
0 1 0
0 0 0
0 0 0
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