Apparatus Control Scilo, Gnrlcswi, Daxcbr And Daxswi; Circuit-Breaker Control Function; Earthing Switch Control Function; Neutral Grounding Resistor Switch Control Function - ABB RELION 630 Series Applications Manual

1MRS757582 C
3.2.5.2
3.2.5.3
3.2.5.4
3.2.5.5
REG630
Application Manual

Apparatus control SCILO, GNRLCSWI, DAXCBR and DAXSWI

Apparatus control initializes and supervises the proper selection and switches on
primary apparatus. Each apparatus requires an interlocking function, switch control
function and apparatus functions.

Circuit-breaker control function

The circuit breaker is controlled by a combination of switch interlocking function
SCILO, switch controller function GNRLCSWI and circuit breaker controller
function DAXCBR.
The position information of the circuit breaker and the truck is connected to
DAXCBR. The interlocking logics for the circuit breaker is programmed to open at
any time. The configuration is designed so that the direct closing of the breaker is
prevented from the IED (as this is done after synchronisation in most of the cases).
However, the configuration provides a circuit breaker closing enable signal at the
binary output PO2 after evaluating certain conditions, that is, ensuring that the gas
pressure inside the circuit breaker is sufficient, the spring charge time is below the set
limit, and the earthing switch is in open position when the truck is in close position.
This enables using the binary output PO2 externally along with the synchronizer for
closing circuit breaker.
The SCILO function checks for the interlocking conditions and provides closing and
opening enable signals. The enable signal is used by the GNRLCSWI function block
which checks for operator place selector before providing the final open or close
signal to the DAXCBR function.
The open, closed and undefined states of the circuit breaker are indicated on the
LHMI.

Earthing switch control function

The earthing switch control function is used for earthing switch position indication.
The IED is not used to control the switching of the earthing switch in this
configuration.
The earthing switch position information is connected to respective DAXSWI via
binary inputs.

Neutral grounding resistor switch control function

The earth-switch control function is used for position indication of the NGR switch.
However, the IED is not used to control the switching of the NGR in this
configuration.
The position information of the NGR switch is connected to the respective DAXSWI
via binary inputs.
Section 3
REG630 variants
29