GE G30 Instruction Manual page 409

CHAPTER 5: SETTINGS
A FlexElement is a universal comparator used to monitor any analog actual value calculated by the relay or a net
difference of any two analog actual values of the same type. The effective operating signal can be treated as a signed
number or its absolute value can be used.
FlexElements run every half power cycle (every four protection passes).
The element can be programmed to respond either to a signal level or to a rate-of-change (delta) over a pre-defined period
of time. The output operand is asserted when the operating signal is higher than a threshold or lower than a threshold, as
per your choice.
— This setting specifies the first (non-inverted) input to the FlexElement. Zero is assumed as the input if
FLEXELEMENT 1 +IN
this setting is set to "Off." For proper operation of the element, at least one input must be selected. Otherwise, the element
does not assert its output operands.
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
FLEXELEMENT 1

PICKUP: 1.000 pu
FLEXELEMENT 1

HYSTERESIS: 3.0%
FLEXELEMENT 1 dt

UNIT: Milliseconds
FLEXELEMENT 1 dt:

20
FLEXELEMENT 1 PKP

DELAY: 0.000 s
FLEXELEMENT 1 RST

DELAY: 0.000 s
FLEXELEMENT 1 BLK:

Off
FLEXELEMENT 1

TARGET: Self-reset
FLEXELEMENT 1

EVENTS: Disabled
Figure 5-97: FlexElement logic
Range: –90.000 to 90.000 pu in steps of 0.001
Range: 0.1 to 50.0% in steps of 0.1
Range: Milliseconds, Seconds, Minutes
Range: 20 to 86400 in steps of 1
Range: 0.000 to 65.535 s in steps of 0.001
Range: 0.000 to 65.535 s in steps of 0.001
Range: FlexLogic operand
Range: Self-reset, Disabled, Latched
Range: Disabled, Enabled
FLEXLOGIC
5
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