ABB RELION 630 Series Applications Manual page 36

Section 3
REM630 variants
30
Circuit-breaker control function
The circuit breaker is controlled by a combination of switch interlocking (SCILO),
switch controller (GNRLCSWI) and circuit breaker controller (DAXCBR) functions.
The position information of the circuit breaker and the truck are connected to
DAXCBR. The interlocking logics for the circuit breaker have been programmed to
open at any time, provided that the gas pressure inside the circuit breaker is above the
lockout limit. Closing of the circuit breaker is always prevented if the gas pressure
inside the circuit breaker is below the lockout limit or the truck is open or spring
charge time is above the set limit.
SCILO function checks for the interlocking conditions and provides closing and
opening enable signals. The enable signal is used by GNRLCSWI function block
which checks for operator place selector before providing the final open or close
signal to DAXCBR function.
The open, closed and undefined states of the circuit breaker are indicated on the
LHMI.
Earth-switch control function
The earth switch is controlled by a combination of SCILO, GNRLCSWI and
DAXSWI functions.
The position information of the earth switch is connected to respective DAXSWI via
binary inputs. Earth switch interlocking depends on the circuit breaker and the truck
position. Opening and closing of the earth switch can be enabled at anytime only if the
circuit breaker and the truck are open.
Interlocking for earth switch is provided. However, the earth switch is
not controlled by the IED, and is considered to be operated manually.
SCILO function checks for these conditions and provides a closing and opening
enable signal. The enable signal is used by GNRLCSWI function blocks which check
for the operator place selector before providing the final open or close signal to
DAXSWI function.
The open, closed and undefined states of the earth switch are indicated on the LHMI.
1MRS756785 G
REM630
Application Manual