GE UR T60, Instruction Manual

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GE Multilin T60 Transformer Protection System 5-111
5 SETTINGS 5.4 SYSTEM SETUP
5
g) FREQUENCY TRIGGERING
PATH: SETTINGS

SYSTEM SETUP

PHASOR MEASUREMENT...

PMU 1 TRIGGERING

PMU 1 FREQUENCY TRIGGER
The trigger responds to the frequency signal of the phasor measurement unit (PMU) source. The frequency is calculated
from either phase voltages, auxiliary voltage, phase currents and ground current, in this hierarchy, depending on the source
configuration as per T60 standards. This element requires the frequency is above the minimum measurable value. If the
frequency is below this value, such as when the circuit is de-energized, the trigger will drop out.
• PMU 1 FREQ TRIGGER LOW-FREQ : This setting specifies the low threshold for the abnormal frequency trigger. The
comparator applies a 0.03 Hz hysteresis.
• PMU 1 FREQ TRIGGER HIGH-FREQ : This setting specifies the high threshold for the abnormal frequency trigger. The
comparator applies a 0.03 Hz hysteresis.
• PMU 1 FREQ TRIGGER PKP TIME : This setting could be used to filter out spurious conditions and avoid unnecessary
triggering of the recorder.
• PMU 1 FREQ TRIGGER DPO TIME : This setting could be used to extend the trigger after the situation returned to nor-
mal. This setting is of particular importance when using the recorder in the forced mode (recording as long as the trig-
gering condition is asserted).
Figure 5–39: FREQUENCY TRIGGER SCHEME LOGIC

PMU 1 FREQUENCY

TRIGGER
PMU 1 FREQ TRIGGER
FUNCTION: Disabled
Range: Enabled, Disabled
MESSAGE
PMU 1 FREQ TRIGGER
LOW-FREQ: 49.00 Hz
Range: 20.00 to 70.00 Hz in steps of 0.01
MESSAGE
PMU 1 FREQ TRIGGER
HIGH-FREQ: 61.00 Hz
Range: 20.00 to 70.00 Hz in steps of 0.01
MESSAGE
PMU 1 FREQ TRIGGER
PKP TIME: 0.10 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
PMU 1 FREQ TRIGGER
DPO TIME: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
PMU 1 FREQ TRIG BLK:
Off
Range: FlexLogic™ operand
MESSAGE
PMU 1 FREQ TRIGGER
TARGET: Self-Reset
Range: Self-Reset, Latched, Disabled
MESSAGE
PMU 1 FREQ TRIGGER
EVENTS: Disabled
Range: Enabled, Disabled
SETTINGS
PMU 1 FREQ TRIGGER
FUNCTION:
Enabled = 1
PMU 1 FREQ TRIG BLK:
Off = 0
SETTING
PMU 1 SIGNAL
SOURCE:
FREQUENCY, f
AND
SETTINGS
PMU 1 FREQ TRIGGER LOW-FREQ:
PMU 1 FREQ TRIGGER HIGH-FREQ:
0< f < LOW-FREQ
OR
f > HIGH-FREQ
RUN
SETTINGS
PMU 1 FREQ TRIGGER PKP TIME:
PMU 1 FREQ TRIGGER DPO TIME:
t
PKP
t
DPO
FLEXLOGIC OPERAND
PMU 1 FREQ TRIGGER
FLEXLOGIC OPERANDS
PMU 1 VOLT TRIGGER
PMU 1 CURR TRIGGER
PMU 1 POWER TRIGGER
PMU 1 ROCOF TRIGGER
SETTING
PMU 1 USER TRIGGER:
Off = 0
OR
FLEXLOGIC OPERAND
PMU 1 TRIGGERED
to STAT bits of
the data frame
847002A2.CDR