GE D30 Instruction Manual page 137

5 SETTINGS
1
USER LABEL
2
USER LABEL
Each pushbutton asserts its own "On" and "Off" FlexLogic™ operands:
These operands are used to program specific actions for each pushbutton. If any pushbutton is active, the
and will be asserted.
Each pushbutton has an associated LED indicator. By default, this indicator displays the present status of the correspond-
ing pushbutton (on or off). However, each LED indicator can be assigned to any FlexLogic™ operand through the
setting.
1(12) LED CTL
The pushbuttons can be automatically controlled by activating the operands assigned to the
and self-reset mode) and
PUSHBTN 1(12) RESET
when the
PUSHBUTTON 1(12) OFF
is dependent on whether latched or self-reset mode is programmed.
• Latched mode: In latched mode, a pushbutton can be set (activated) by asserting the operand assigned to the
setting or by directly pressing the associated front panel pushbutton. The pushbutton maintains the set
BTN 1(12) SET
state until deactivated by the reset command or after a user-specified time delay. The state of each pushbutton is
stored in non-volatile memory and maintained through a loss of control power.
The pushbutton is reset (deactivated) in latched mode by asserting the operand assigned to the
setting or by directly pressing the associated active front panel pushbutton.
It can also be programmed to reset automatically through the
settings. These settings enable the autoreset timer and specify the associated time delay. The autoreset timer
DELAY
can be used in select-before-operate (SBO) breaker control applications, where the command type (close/open) or
breaker location (feeder number) must be selected prior to command execution. The selection must reset automati-
cally if control is not executed within a specified time period.
• Self-reset mode: In self-reset mode, a pushbutton will remain active for the time it is pressed (the pulse duration) plus
the dropout time specified in the
the pulse duration is specified by the
setting has no effect on the pulse duration.
PUSHBTN 1(12) SET
The pushbutton is reset (deactivated) in self-reset mode when the dropout delay specified in the
setting expires.
OUT TIME
The pulse duration of the remote set, remote reset, or local pushbutton must be at least 50 ms to operate the push-
button. This allows the user-programmable pushbuttons to properly operate during power cycling events and vari-
NOTE ous system disturbances that may cause transient assertion of the operating signals.
The local and remote operation of each user-programmable pushbutton can be inhibited through the
and settings, respectively. If local locking is applied, the pushbutton will ignore set and reset com-
PUSHBTN 1(12) REMOTE
mands executed through the front panel pushbuttons. If remote locking is applied, the pushbutton will ignore set and reset
commands executed through FlexLogic™ operands.
The locking functions are not applied to the autorestart feature. In this case, the inhibit function can be used in SBO control
operations to prevent the pushbutton function from being activated and ensuring "one-at-a-time" select operation.
The locking functions can also be used to prevent the accidental pressing of the front panel pushbuttons. The separate
inhibit of the local and remote operation simplifies the implementation of local/remote control supervision.
GE Multilin
3 5
USER LABEL USER LABEL
4 6
USER LABEL USER LABEL
Figure 5–5: USER-PROGRAMMABLE PUSHBUTTONS
(for latched mode only) settings. The pushbutton reset status is declared
operand is asserted. The activation and deactivation of user-programmable pushbuttons
PUSHBTN 1(12) DROP-OUT TIME
PUSHBTN 1(12) DROP-OUT TIME
D30 Line Distance Relay
5.2 PRODUCT SETUP
7 9
USER LABEL USER LABEL
8 10
USER LABEL USER LABEL
and
PUSHBUTTON 1(12) ON
PUSHBTN 1(12) SET
and
PUSHBTN 1(12) AUTORST
setting. If the pushbutton is activated via FlexLogic™,
only. The time the operand remains assigned to the
11
USER LABEL
5
12
USER LABEL
842779A1.CDR
.
PUSHBUTTON 1(12) OFF
oper-
ANY PB ON
PUSHBTN
(for latched
PUSH-
PUSHBTN 1(12) RESET
PUSHBTN 1(12) AUTORST
PUSHBTN 1(12) DROP-
PUSHBTN 1(12) LOCAL
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