GE D30 Instruction Manual

Also see for D30 series: Communications manual Communications guide Instruction manual Instruction manual Instruction manual

Contents

5-264 D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUALCONTROL ELEMENTS CHAPTER 5: SETTINGS5SELECTOR 1 STEP-UP MODE — This setting defines the selector mode of operation. When set to “Time-out,” the selectorchanges its position after a pre-defined period of inactivity at the control input. The change is automatic and does notrequire any explicit confirmation of the intent to change the selector's position. When set to “Acknowledge,” the selectorchanges its position only after the intent is confirmed through a separate acknowledging signal. If the acknowledgingsignal does not appear within a pre-defined period of time, the selector does not accept the change and an alarm isestablished by setting the SELECTOR STP ALARM output FlexLogic operand for three seconds.SELECTOR 1 ACK — This setting specifies an acknowledging input for the stepping up control input. The pre-selectedposition is applied on the rising edge of the assigned operand. This setting is active only under “Acknowledge” mode ofoperation. The acknowledging signal must appear within the time defined by the SELECTOR 1 TIME-OUT setting after the lastactivity of the control input. A user-programmable pushbutton is typically configured as the acknowledging input.SELECTOR 1 3BIT A0, A1, and A2 — These settings specify a three-bit control input of the selector. The three-bit control wordpre-selects the position using the following encoding convention:The “rest” position (0, 0, 0) does not generate an action and is intended for situations when the device generating the three-bit control word is having a problem. When SELECTOR 1 3BIT MODE is “Time-out,” the pre-selected position is applied inSELECTOR 1 TIME-OUT seconds after the last activity of the three-bit input. When SELECTOR 1 3BIT MODE is “Acknowledge,”the pre-selected position is applied on the rising edge of the SELECTOR 1 3BIT ACK acknowledging input.The stepping up control input (SELECTOR 1 STEP-UP) and the three-bit control inputs (SELECTOR 1 3BIT A0 through A2) lock-outmutually: once the stepping up sequence is initiated, the three-bit control input is inactive; once the three-bit controlsequence is initiated, the stepping up input is inactive.SELECTOR 1 3BIT MODE — This setting defines the selector mode of operation. When set to “Time-out,” the selector changesits position after a pre-defined period of inactivity at the control input. The change is automatic and does not requireexplicit confirmation to change the selector position. When set to “Acknowledge,” the selector changes its position onlyafter confirmation via a separate acknowledging signal. If the acknowledging signal does not appear within a pre-definedperiod of time, the selector rejects the change and an alarm established by invoking the SELECTOR BIT ALARM FlexLogic operandfor three seconds.SELECTOR 1 3BIT ACK — This setting specifies an acknowledging input for the three-bit control input. The pre-selectedposition is applied on the rising edge of the assigned FlexLogic operand. This setting is active only under the“Acknowledge” mode of operation. The acknowledging signal must appear within the time defined by the SELECTOR TIME-OUT setting after the last activity of the three-bit control inputs. Note that the stepping up control input and three-bitcontrol input have independent acknowledging signals (SELECTOR 1 ACK and SELECTOR 1 3BIT ACK, accordingly).SELECTOR 1 POWER-UP MODE — This setting specifies the element behavior on power up of the relay.When set to “Restore,” the last position of the selector (stored in the non-volatile memory) is restored after powering up therelay. If the position restored from memory is out of range, position 0 (no output operand selected) is applied and an alarmis set (SELECTOR 1 PWR ALARM).When set to “Synchronize,” the selector switch acts as follows. For two power cycles, the selector applies position 0 to theswitch and activates SELECTOR 1 PWR ALARM. After two power cycles expire, the selector synchronizes to the positiondictated by the three-bit control input. This operation does not wait for time-out or the acknowledging input. When thesynchronization attempt is unsuccessful (that is, the three-bit input is not available (0,0,0) or out of range), then the selectorswitch output is set to position 0 (no output operand selected) and an alarm is established (SELECTOR 1 PWR ALARM).A2 A1 A0 Position0 0 0 rest0 0 1 10 1 0 20 1 1 31 0 0 41 0 1 51 1 0 61 1 1 7