Synchrocheck (Ansi 25) - GE D60 Instruction Manual

CHAPTER 5: SETTINGS
— This setting defines the maximum frequency level required for operation of the element.
FREQ RATE 1 MAX FREQUENCY
The setting can be used to effectively block the feature based on frequency. For example, if the intent is to monitor a
decreasing trend but only if the frequency is already below a certain level (such as for load shedding), set this setting to the
required frequency level.
If the signal source assigned to the frequency rate of change element is only set to auxiliary VT, then the minimum
voltage supervision is 3 V.

5.8.9 Synchrocheck (ANSI 25)

SETTINGS  CONTROL ELEMENTS  SYNCHROCHECK  SYNCHROCHECK 1(10)
 SYNCHROCHECK 1

D60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 5-175: Frequency rate of change logic
SYNCHK1 FUNCTION:

Disabled
SYNCHK1 BLOCK:

Off
SYNCHK1 V1 SOURCE:

SRC 1
SYNCHK1 V2 SOURCE:

SRC 2
SYNCHK1 MAX VOLT

DIFF: 10000 V
SYNCHK1 MAX ANGLE

DIFF: 30°
SYNCHK1 MAX FREQ

DIFF: 1.00 Hz
Range: Disabled, Enabled
Range: FlexLogic operand
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0 to 400000 V in steps of 1
Range: 0 to 100° in steps of 1
Range: 0.00 to 2.00 Hz in steps of 0.01
CONTROL ELEMENTS
5
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