Signals - ABB RELION REX640 Technical Manual

Section 6
Supervision functions
6.1.6
1204
drop of the feeding auxiliary voltage system which can cause too low voltage values
over the TCS contact. In this case, erroneous alarming can occur.
At lower (<48 V DC) auxiliary circuit operating voltages, it is recommend either to
use the static output and single-pole connection (as then there is no internal current
drain and U = 0 V), or not to use R
D
Using power output contacts without trip circuit supervision
In case of mechanical outputs, if TCS is not used, the internal current drain
(PSM100x.X2:4, PSM100x.X2:9 and PSM100x.X2:14 in PODP1, PODP2 and
PODP2 outputs, respectively) can be left unconnected. The output can then be used as
a normal power output.
Incorrect connections and use of trip circuit supervision
Although the TCS circuit in the PODP1, PODP2 and PODP2 outputs consists of two
separate contacts, it must be noted that those are designed to be used as series
connected to guarantee the breaking capacity given in the technical manual of the
protection relay. Figure 654
the contacts is used.
(+)
R R
int int
TCS TCS
R R
ext ext
Trip
coil
(-)
GUID-2A43108C-FBA6-4F88-B32B-08C0B46D15A6 V1 EN
Figure 654: Incorrect connection of trip-circuit supervision

Signals

Table 1123: TCSSCBR Input signals
Name Type
TCS_STATE BOOLEAN
BLOCK BOOLEAN
Table 1124: TCSSCBR Output signals
Name Type
ALARM BOOLEAN
and block TCS when the circuit breaker is open.
ext
shows incorrect usage of a TCS circuit when only one of
(+)
Relay
CB operating
mechanism
(-)
Default Description
0=False Trip circuit supervision status
0=False Block input status
Description
Alarm output
1MRS759142 C
Relay
R R
int int
TCS TCS
R R
ext ext
CB operating
mechanism
Trip
coil
REX640
Technical Manual