GE T60 Instruction Manual page 271

5 SETTINGS
• SWITCH 1 MODE: This setting selects "3-Pole" mode, where disconnect switch poles have a single common auxiliary
switch, or "1-Pole" mode where each disconnect switch pole has its own auxiliary switch.
• SWITCH 1 OPEN: This setting selects an operand that when activated, and unless blocked, initiates the disconnect
switch 1 open command.
• SWITCH 1 BLK OPEN: This setting selects an operand that prevents initiation of the disconnect switch 1 command.
This setting can be used for blocking disconnect switch opening for instance when switchyard monitoring indicates cur-
rent 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
switch 1 close command.
• SWITCH 1 BLK CLOSE: This setting selects an operand that prevents initiation of disconnect switch 1 close com-
mands. This setting can be used for blocking disconnect switch closing, for instance to prevent closing into a closed
ground switch.
SWTCH 1 ΦA/3P CLSD: This setting selects an operand, usually a contact input connected to a disconnect switch
•
auxiliary position tracking mechanism. This input is for a normally-open 89/a status input that creates a logic 1 when
the disconnect switch is closed. If the
input as the operand used to track the disconnect switch open or closed position. If the mode is selected as "1-Pole",
the input mentioned above is used to track phase A and the
track phases B and C, respectively.
SWTCH 1 ΦA/3P OPND: This setting selects an operand, usually a contact input, that is for a normally-closed 89/b
•
status input that creates a logic 1 when the disconnect switch is open. If a separate 89/b contact input is not available,
then an inverted 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 above 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 above 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 above 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 above for phase A.
• SWITCH 1 TOPERATE: This setting specifies the required interval to overcome transient disagreement between the
89/a and 89/b auxiliary contacts during disconnect switch operation. If transient disagreement still exists after this time
has expired, the
SWITCH 1 BAD STATUS
• SWITCH 1 ALARM DELAY: This setting specifies the delay interval during which a disagreement of status among the
pole position tracking operands will not declare a pole disagreement. This allows for non-simultaneous operation of the
poles.
IEC 61850 functionality is permitted when the T60 is in "Programmed" mode and not in the local control mode.
NOTE
GE Multilin
setting is selected as "3-Pole", this setting selects a single 89/a
SWITCH 1 MODE
SWITCH 1
FlexLogic operand is asserted for alarm or blocking purposes.
T60 Transformer Protection System
5.4 SYSTEM SETUP
Φ Φ
and settings select operands to
B SWITCH 1 C
5
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