GE F650 - Page 222

GEK-106310AB F650 Digital Bay Controller 5-75
5 SETTINGS 5.4 PROTECTION ELEMENTS
5
5.4.8.6 AUXILIARY UNDERVOLTAGE ELEMENT (27X)
This is an Auxiliary undervoltage element for general use that uses as its input magnitude the voltage measured by the 4
th
VT, terminals A11-A12 (when VX is selected as Auxiliary Voltage in General Settings).
Table 5–69: 27X ELEMENT SETTINGS
The snapshot event setting enables or disables the snapshot event generation for this element.
5.4.9 POWER
5.4.9.1 FORWARD POWER ELEMENT (32FP)
The 32FP element produces a trip when exported power exceeds the setting value. Monitored power is active power,
calculated by the three phase voltages and currents, and it is considered to be exported, positive active power, the one
given in the direction of the line protected by the relay; in this situation, the angle between secondary voltage and current is
lower than 90º, according to the relay wiring diagram.
Figure 5–16: FORWARD POWER CHARACTERISTIC
Table 5–70: 2FP ELEMENT SETTINGS
The snapshot event setting enables or disables the snapshot event generation for this element.
The F650 includes three 32FP elements. Each elements incorporates two stages, the first stage, less critical, is intended to
produce an alarm, the second stage is used for trip. Both levels are set in primary values, for instance: if in general
settings we set CT_RATIO to a value of 100, and the same value for PT_RATIO, the base power will be: 100 x 100 = 10000
W
SETPOINT > PROTECTION ELEMENTS > VOLTAGE ELEMENTS > AUXILIARY UV >
AUXILIARY UV 1> AUXILIARY UV 2 > AUXILIARY UV 3
setting Description Name Default Value Step Range
Function permission Function DISABLED N/A [DISABLED – ENABLED]
Pickup Level Pickup Level 10 1 V [3 : 300]
Curve shape Curve DEFINITE TIME N/A [DEFINITE TIME – INVERSE TIME]
Time Dial Delay 10.00 0.01 s [0.00 : 900.00]
Snapshot Event generation Snapshot Events ENABLED N/A [DISABLED – ENABLED]
SETPOINT > PROTECTION ELEMENTS > POWER > FORWARD POWER
FORWARD POWER 1> FORWARD POWER 2 > FORWARD POWER 3
SETTING DESCRIPTION NAME DEFAULT
VALUE
STEP RANGE
Function permission Function DISABLED N/A [DISABLED – ENABLED]
Block from off-line Blk Time After Close 0.00 0.01 s [0.00 : 900.00]
Pickup level for stage 1 Stage 1 Tap 10.00 0.01MW [0.00 : 10000.00]
Trip time for stage 1 Stage 1 Time 60.00 0.01 s [0.00 : 900.00]
Pickup level for stage 2 Stage 2 Tap 20.00 0.01MW [0.00 : 10000.00]
Trip time for stage 2 Stage 2 Time 60.00 0.01 s [0.00 : 900.00]
Snapshot Event generation Snapshot Events ENABLED N/A [DISABLED – ENABLED]
0
+P -P
RESTRAINING OPERATION