GE N60 Instruction Manual page 320

CONTROL ELEMENTS
There are 48 identical digital elements available, numbered 1 to 48. A digital element can monitor any FlexLogic operand
and present a target message and/or enable events recording depending on the output operand state. The digital element
settings include a name to be referenced in any target message, a blocking input from any selected FlexLogic operand,
and a timer for pickup and reset delays for the output operand.
DIGITAL ELEMENT 1 INPUT
DIGITAL ELEMENT 1 PICKUP DELAY
is not required, set to "0," To avoid nuisance alarms, set the delay greater than the operating time of the breaker.
DIGITAL ELEMENT 1 RESET DELAY
5
DIGITAL ELEMENT 1 PICKUP LED
operation of the pickup LED is blocked.
SETTING
DIGITAL ELEMENT 01
FUNCTION:
Enabled = 1
SETTING
DIGITAL ELEMENT 01
INPUT:
Off = 0
SETTING
DIGITAL ELEMENT 01
BLOCK:
Off = 0
Circuit monitoring applications
Some versions of the digital input modules include an active voltage monitor circuit connected across form-A contacts.
The voltage monitor circuit limits the trickle current through the output circuit (see technical specifications for form-A).
As long as the current through the voltage monitor is above a threshold (see technical specifications for form-A), the
FlexLogic operand is set (for contact input 1—corresponding operands exist for each contact output). If the output
Op 1 VOn
circuit has a high resistance or the DC current is interrupted, the trickle current drops below the threshold and the
FlexLogic operand is set. Consequently, the state of these operands can be used as indicators of the integrity of the
VOff
circuits in which form-A contacts are inserted.
5-204
DIG ELEM 1 INPUT:

Off
DIG ELEM 1 PICKUP

DELAY: 0.000 s
DIG ELEM 1 RESET

DELAY: 0.000 s
DIG ELEMENT 1

PICKUP LED: Enabled
DIG ELEM 1 BLOCK:

Off
DIGITAL ELEMENT 1

TARGET: Self-reset
DIGITAL ELEMENT 1

EVENTS: Disabled
— Selects a FlexLogic operand to be monitored by the digital element.
— Sets the required time delay from element pickup to element operation. If a pickup delay
— Sets the time delay to reset. If a reset delay is not required, set to "0."
— This setting enables or disabled the digital element pickup LED. When set to "Disabled," the
Figure 5-101: Digital element logic
SETTING
DIGITAL ELEMENT 01
NAME:
AND RUN
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
Range: FlexLogic operand
Range: 0.000 to 999999.999 s in steps of 0.001
Range: 0.000 to 999999.999 s in steps of 0.001
Range: Disabled, Enabled
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
SETTINGS
DIGITAL ELEMENT 01
PICKUP DELAY:
DIGITAL ELEMENT 01
RESET DELAY:
t
PKP
INPUT = 1
t
RST
CHAPTER 5: SETTINGS
FLEXLOGIC OPERANDS
DIG ELEM 01 DPO
DIG ELEM 01 PKP
DIG ELEM 01 OP
827042A2.VSD
Cont
Cont Op 1