Underfrequency (Ansi 81U) - GE N60 Instruction Manual
Network stability and synchrophasor measurement system
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- Instruction manual (666 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (460 pages)
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CONTROL ELEMENTS
5
5.8.5 Underfrequency (ANSI 81U)
SETTINGS CONTROL ELEMENTS UNDERFREQUENCY UNDERFREQUENCY 1(6)
UNDERFREQUENCY 1
There are six identical underfrequency elements, numbered 1 through 6.
5-242
Figure 5-129: Selector switch logic
UNDFREQ 1 FUNCTION:
Disabled
UNDERFREQ 1 BLOCK:
Off
UNDERFREQ 1 SOURCE:
SRC 1
UNDERFREQ 1 MIN
VOLT/AMP: 0.10 pu
UNDERFREQ 1 PICKUP:
59.50 Hz
UNDERFREQ 1 PICKUP
DELAY: 2.000 s
UNDERFREQ 1 RESET
DELAY : 2.000 s
UNDERFREQ 1 TARGET:
Self-reset
UNDERFREQ 1 EVENTS:
Disabled
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
Range: Disabled, Enabled
Range: FlexLogic operand
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: 0.10 to 1.25 pu in steps of 0.01
Range: 20.00 to 65.00 Hz in steps of 0.01
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: Self-reset, Latched, Disabled
Range: Disabled, Enabled
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