Underfrequency (Ansi 81U) - GE G30 Instruction Manual

CHAPTER 5: SETTINGS

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.
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 5-152: 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
Range: Disabled, Enabled
Range: FlexLogic operand
Range: SRC 1, SRC 2, SRC 3, SRC 4
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
CONTROL ELEMENTS
5
5-277