ABB RELION 670 SERIES Applications Manual page 673

Line distance protection

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1MRK 506 369-UUS -

Line distance protection REL670 2.2 ANSI

Application manual

protection trip or from breaker failure protection. When the circuit breaker open position

is set to start the auto recloser, then manual opening must also be connected here. The

inhibit is often a combination of signals from external IEDs via the I/O and internal

functions. An OR-gate is then used for the combination.

The auto reclosing mode is selected with the ARMode setting. As an alternative to the

setting, the mode can be selected by connecting an integer, for example from function

block B16I, to the MODEINT input. The six possible modes are described in table 6 with

their corresponding MODEINT integer value. When a valid integer is connected to the

input MODEINT the selected ARMode setting will be invalid and the MODEINT input

value will be used instead. The selected mode is reported as an integer on the MODE

These inputs can be connected to binary inputs or to a communication interface block for

external control.

This is intended for line protection permissive signal channel lost (fail) for example, PLC=

Power Line Carrier failure. It can be connected, when it is required to prolong the auto

reclosing dead time when communication is not working, that is, one line end might trip

with a zone2 delay. If this is used the auto recloser must also be started from zone2 time

delayed trip.

Used to reset the auto recloser to start conditions. Possible hold by thermal overload

protection will be reset. Circuit breaker position will be checked and time settings will be

restarted with their set times.

There is a counter for each type of auto reclosing and one for the total number of circuit

breaker close commands issued. All counters are reset with the RSTCOUNT input or by

an IEC 61850 command.

The high-speed auto reclosing sequence can be skipped and be replaced by normal auto

reclosing sequence by activating SKIPHS input before the STARTHS high-speed start

input is activated. The replacement is done for the 1st shot.