ABB RELION REX640 Technical Manual page 1207

1MRS759142 C
REX640
Technical Manual
(+)
Parallel
trip contacts
O
Trip
coil
(-)
GUID-1CF8C053-7B97-4526-8B09-A21D23E72594 V1 EN
Figure 652: Constant test current flow in parallel trip contacts and trip circuit
supervision
In case of parallel trip contacts, the recommended way to do the wiring is that the TCS
test current flows through all wires and joints.
IED
I
TCS
R
ext
CB operating
mechanism
Section 6
Supervision functions
1201