CHAPTER 7: PROTECTION CONTROL ELEMENTS
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 367
Block Close Command
Range: any FlexLogic operand or shared operand
Default: Off
This setting selects an operand that prevents closing of the breaker. This setting can be
used for select-before-operate functionality or to block operation from a panel switch or
from SCADA.
Breaker Local Input
Range: any FlexLogic operand or shared operand
Default: OFF
Closing or opening of the breaker through the breaker interlock element is inhibited if the
operand assigned to this setting is asserted.
Indication Mode
Range: 3 Pole, 1 Pole
Default: 3 Pole
If “3 Pole” is selected, the breaker indications are derived from a single status input (or
pair of status inputs). If “1 Pole” is selected, the breaker indications are derived from
three status inputs (or pairs of status inputs).
Phase A/3P Closed Status
Range: any FlexLogic operand or shared operand
Default: BKR1 52a On
The operand selected by this setting is used to derive three-pole or phase A breaker
position indications from a normally-opened (52a) status input.
Phase A/3P Opened Status
Range: any FlexLogic operand or shared operand
Default: BKR1 52a Off
The operand selected by this setting is used to derive three-pole or phase A breaker
position indications from a normally-closed (52b) status input. If unavailable, the closed
status input can be inverted to provide this signal.
Phase B Closed Status
Range: any FlexLogic operand or shared operand
Default: Off
The operand selected by this setting is used to derive the phase B breaker position
indication from a normally-opened (52a) status input. This input is not required if the
indication mode is single-pole.
Phase B Opened Status
Range: any FlexLogic operand or shared operand
Default: Off
The operand selected by this setting is used to derive the phase B breaker position
indication from a normally-closed (52b) status input. If unavailable, the closed status
input can be inverted to provide this signal. This input is not required if the indication
mode is single-pole.
Phase C Closed Status
Range: any FlexLogic operand or shared operand
Default: Off
The operand selected by this setting is used to derive the phase B breaker position
indication from a normally-opened (52a) status input. This input is not required if the
indication mode is single-pole.
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