ABB RELION REX640 - 6.1.6 Signals; 6.1.6.1 TCSSCBR Input signals; 6.1.6.2 TCSSCBR Output signals

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 743 shows incorrect usage of a TCS circuit when only one of
the contacts is used.
(+)
(-)
Relay
R
ext
R
ext
R
int
R
int
TCSTCS
(+)
(-)
Relay
R
ext
R
ext
R
int
R
int
TCSTCS
Trip
coil
CB operating
mechanism
CB operating
mechanism
Trip
coil
Figure 743: Incorrect connection of trip-circuit supervision
6.1.6 Signals
6.1.6.1 TCSSCBR Input signals
Table 1239: TCSSCBR Input signals
Name Type Default Description
TCS_STATE BOOLEAN 0=False Trip circuit supervi-
sion status
BLOCK BOOLEAN 0=False Block input status
6.1.6.2 TCSSCBR Output signals
Table 1240: TCSSCBR Output signals
Name
Type Description
ALARM BOOLEAN Alarm output
1MRS759142 F Supervision functions
REX640
Technical Manual
1309