Underfrequency 1 - GE UR Series F60 Instruction Manual

5.6 CONTROL ELEMENTS
SETTINGS
SELECTOR 1 FUNCTION:
Enabled = 1
SELECTOR 1 STEP-UP:
Off = 0
SELECTOR 1 ACK:
Off = 0
SELECTOR 1 3BIT A0:
Off = 0
SELECTOR 1 3BIT A1:
Off = 0
SELECTOR 1 3BIT A2:
Off = 0
SELECTOR 1 3BIT ACK:
Off = 0
5
PATH: SETTINGS CONTROL ELEMENTS

UNDERFREQUENCY 1

There are six identical underfrequency elements, numbered from 1 through 6.
The steady-state frequency of a power system is a certain indicator of the existing balance between the generated power
and the load. Whenever this balance is disrupted through the loss of an important generating unit or the isolation of part of
the system from the rest of the system, the effect will be a reduction in frequency. If the control systems of the system gen-
erators do not respond fast enough, the system may collapse. A reliable method to quickly restore the balance between
5-154
SETTINGS
SELECTOR 1 FULL RANGE:
SELECTOR 1 STEP-UP MODE:
SELECTOR 1 3BIT MODE:
SELECTOR 1 TIME-OUT:
SELECTOR 1 POWER-UP MODE:
RUN
step up
acknowledge
3-bit acknowledge
Figure 5–80: SELECTOR SWITCH LOGIC
UNDERFREQUENCY
UNDFREQ 1 FUNCTION:
Disabled
UNDERFREQ 1 BLOCK:
MESSAGE
Off
UNDERFREQ 1 SOURCE:
MESSAGE
SRC 1
UNDERFREQ 1 MIN
MESSAGE
VOLT/AMP: 0.10 pu
UNDERFREQ 1 PICKUP:
MESSAGE
59.50 Hz
UNDERFREQ 1 PICKUP
MESSAGE
DELAY: 2.000 s
UNDERFREQ 1 RESET
MESSAGE
DELAY : 2.000 s
UNDERFREQ 1 TARGET:
MESSAGE
Self-reset
UNDERFREQ 1 EVENTS:
MESSAGE
Disabled
F60 Feeder Protection System
ACTUAL VALUE
SELECTOR 1 POSITION
FLEXLOGIC™ OPERANDS
SELECTOR 1 POS 1
2
1
SELECTOR 1 POS 2
3
SELECTOR 1 POS 3
4
SELECTOR 1 POS 4
SELECTOR 1 POS 5
ON
7 5
SELECTOR 1 POS 6
6
SELECTOR 1 POS 7
FLEXLOGIC™ OPERANDS
SELECTOR 1 STP ALARM
SELECTOR 1 BIT ALARM
3-bit position out
SELECTOR 1 ALARM
SELECTOR 1 PWR ALARM
SELECTOR 1 BIT 0
SELECTOR 1 BIT 1
SELECTOR 1 BIT 2
UNDERFREQUENCY 1(6)
Range: Disabled, Enabled
Range: FlexLogic™ operand
Range: SRC 1, SRC 2
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
5 SETTINGS
842012A2.CDR
5.6.4 UNDERFREQUENCY
GE Multilin