438 D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
DISCONNECTS CHAPTER 8: AUTOMATION
Disconnect Local Input
Range: any automation logic operand or shared operand
Default: OFF
Closing or opening of the disconnect through the disconnect interlock element is
inhibited if the operand assigned to this setting is asserted.
Indication Mode
Range: 3-Pole, 1-Pole
Default: 3-Pole
If the “3-Pole” value is selected, the disconnect indications are derived from a single
status input (or pair of status inputs). If the “1-Pole” value is selected, the disconnect
indications are derived from three status inputs (or pairs of status inputs).
Phase A/3P Closed Status
Range: any automation logic operand or shared operand
Default: Off
The operand assigned to this setting is used to derive the three-pole or phase A circuit
disconnect position indication from a normally-opened (52a) status input.
Phase A/3P Opened Status
Range: any automation logic operand or shared operand
Default: DSC2 89a On(K10)
The operand assigned to this setting is used to derive the three-pole or phase A circuit
disconnect position indication 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 automation logic operand or shared operand
Default: DSC2 89a Off(K10)
The operand assigned to this setting is used to derive the phase B disconnect position
indication from a normally-opened (52a) status input. This setting is not required if the
Indication Mode is “1-Pole.”
Phase B Opened Status
Range: any automation logic operand or shared operand
Default: Off
The operand assigned to this setting is used to derive the phase B disconnect position
indication from a normally-closed (52b) status input. If unavailable, the closed status
input can be inverted to provide this signal. This setting is not required if the
Indication
Mode
is “1-Pole.”
Phase C Opened Status
Range: any automation logic operand or shared operand
Default: Off
The operand assigned to this setting is used to derive the phase C disconnect position
indication from a normally-opened (52a) status input. This setting is not required if the
Indication Mode is “1-Pole.”
Phase C Closed Status
Range: any automation logic operand or shared operand
Default: Off
The operand assigned to this setting is used to derive the phase C disconnect position
indication from a normally-closed (52b) status input. If unavailable, the closed status
input can be inverted to provide this signal. This setting is not required if the
Indication
Mode
is “1-Pole.”
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