GE C70 Instruction Manual

Also see for C70: Communications manual Communications guide Instruction manual Instruction manual Instruction manual

Contents

5-152 C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUALSYSTEM SETUP CHAPTER 5: SETTINGS5SWITCH 1 OPEN — This setting selects an operand that when activated, and unless blocked, initiates the disconnect switch 1open command.SWITCH 1 BLK OPEN — This setting selects an operand that prevents initiation of the disconnect switch 1 command. Thissetting can be used to block the disconnect switch from opening, for instance when switchyard monitoring indicates thatcurrent exceeding the switch's interrupting rating can be flowing through the switch.SWITCH 1 CLOSE — This setting selects an operand that when activated, and unless blocked, initiates the disconnect switch1 close command.SWITCH 1 BLK CLOSE — This setting selects an operand that prevents initiation of disconnect switch 1 close commands. Thissetting can be used to block the disconnect switch from closing, for instance to prevent closing into a closed groundswitch.SWTCH 1 ΦA/3P CLSD — This setting selects an operand, usually a contact input connected to a disconnect switch auxiliaryposition tracking mechanism. This input is for a normally-open 89/a status input that creates a logic 1 when thedisconnect switch is closed. If the SWITCH 1 MODE setting is selected as “3-Pole,” this setting selects a single 89/a input asthe operand used to track the disconnect switch open or closed position. If the mode is selected as “1-Pole,” the inputmentioned is used to track phase A and the SWITCH 1 ΦB and SWITCH 1 ΦC settings select operands to track phases B andC, respectively.SWTCH 1 ΦA/3P OPND — This setting selects an operand, usually a contact input, that is for a normally-closed 89/b statusinput that creates a logic 1 when the disconnect switch is open. If a separate 89/b contact input is not available, then aninverted 89/a status signal can be used.SWITCH 1 ΦB CLOSED — If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-pole, this input is used to track the disconnect switch phase B closed position as outlined for phase A.SWITCH 1 ΦB OPENED — If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-pole, this input is used to track the disconnect switch phase B opened position as outlined for phase A.SWITCH 1 ΦC CLOSED — If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-pole, this input is used to track the disconnect switch phase C closed position as outlined for phase A.SWITCH 1 ΦC OPENED — If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-pole, this input is used to track the disconnect switch phase C opened position as outlined for phase A.SWITCH 1 PUSH BUTTON CONTROL — Set to "Enable" to allow front panel pushbutton open/close control operations.SWITCH 1 TAGGING — Set to "Enable" to allow the graphical front panel to tag switch 1. When tagged, the followingoperations are disabled:• Pushbutton Open/Close• IEC 61850 Open/Close• Open command initiated by SWITCH 1 OPEN setting• Close command initiated by SWITCH 1 CLOSE settingSWITCH 1 SUBSTITUTN — Set to "Enable" to allow the graphical front panel to substitute switch 1 status. When substituted,switch 1 control open/close status is forced to the substituted value.SWITCH 1 BYPASS —Set to "Enable" to allow the graphical front panel to bypass switch 1 interlocking. When asserted,SWITCH 1 BLK OPEN and SWITCH 1 BLK CLOSE settings are bypassed.SWITCH 1 OPEN SEAL-IN — This setting specifies the seal-in time of the open command due to an operator-initiated manualopen command to the disconnect switch.SWITCH 1 CLOSE SEAL-IN — This setting specifies the seal-in time of the close command due to an operator-initiated manualclose command to the disconnect switch.SWITCH 1 TOPERATE — This setting specifies the required interval to overcome transient disagreement between the 89/aand 89/b auxiliary contacts during disconnect switch operation. If transient disagreement still exists after this time hasexpired, the SWITCH 1 BAD STATUS FlexLogic operand is asserted for alarm or blocking purposes.SWITCH 1 ALARM DELAY — This setting specifies the delay interval during which a disagreement of status among the poleposition tracking operands do not declare a pole disagreement. This allows for non-simultaneous operation of the poles.