GE 845 Instruction Manual page 186

Transformer protection system
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DEVICE
4–58
HOLD PRESSED
Range: 0.0 to 10.0 s in steps of 0.1 s
Default: 0.1 s
This setting specifies the time required for a pushbutton to be pressed before it is
deemed active.
The timer is Reset upon release of the pushbutton. Note that any pushbutton operation
will require the pushbutton to be pressed a minimum of 60 ms. This minimum time is
required prior to activating the pushbutton hold timer.
AUTORESET
Range: Disabled, Enabled
Default: Disabled
This setting enables the user-programmable pushbutton Autoreset feature. The setting
is applicable only if the pushbutton is in "Latched" mode.
AUTORESET DELAY
Range: 0.2 to 600.0 s in steps of 0.1 s
Default: 1.0 s
This setting specifies the time delay for automatic Reset of the pushbutton when in the
"Latched" mode.
LOCK
Range: Off, Any FlexLogic operand
Default: Off
This setting assigns a FlexLogic operand serving to inhibit pushbutton operation from
the front panel pushbuttons. This locking functionality is not applicable to pushbutton
autoreset.
DROPOUT TIME
Range: 0.0 to 600.0 s in steps of 0.1 s
Default: 0.0 s
This setting applies only to "Self-reset" mode and specifies the duration of the
pushbutton "active" status after the pushbutton has been released. The length of time
the operand remains on has no effect on the pulse duration.
The setting is required to set the duration of the pushbutton operating pulse.
EVENTS
Range: Disabled, Enabled
Default: Enabled
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS

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