ABB REF615 Applications Manual page 113

1MRS756378 D
REF615
Application Manual
together with the open earthing switch and non-active trip signals, activates the close-
enable signal to the circuit breaker control function block. The open operation is
always enabled. The auto-recloser close command signals are directly connected to
the output contact PO1 (X100:6-7).
If the ENA_CLOSE signal is removed from the breaker control
function block CBXCBR with SMT, the function assumes that the
breaker close commands are allowed continuously.
The ITL_BYPASS input can be used, for example, to always enable the closing of
the circuit breaker when the circuit breaker truck is out in the test position, despite of
the interlocking conditions being active when the circuit breaker truck is closed in
service position.
The circuit breaker condition monitoring function (SSCBR) supervises the circuit
breaker status based on the binary input information connected and measured current
levels. The function introduces various supervision methods. The corresponding
supervision alarm signals are routed to LED 8.
Section 3
REF615 variants
107