GE L90 Instruction Manual page 337

5 SETTINGS
The element resets instantaneously. The minimum voltage setting selects the operating voltage below which the element is
blocked.
SETTING
AUX UV1
FUNCTION:
Disabled=0
Enabled=1
SETTING
AUX UV1 BLOCK:
Off=0
SETTING
AUX UV1 SIGNAL
SOURCE:
AUX VOLT Vx
Figure 5–112: AUXILIARY UNDERVOLTAGE SCHEME LOGIC
f) AUXILIARY OVERVOLTAGE (ANSI 59X)X
PATH: SETTINGS GROUPED ELEMENTS
AUXILIARY OV1
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The L90 contains one auxiliary overvoltage element for each VT bank. This element is intended for monitoring overvoltage
conditions of the auxiliary voltage. The nominal secondary voltage of the auxiliary voltage channel entered under
SETUP AC INPUTS VOLTAGE BANK X5
pickup level.
A typical application for this element is monitoring the zero-sequence voltage (3V_0) supplied from an open-corner-delta
VT connection.
GE Multilin
SETTING
AUX UV1 PICKUP:
AUX UV1 CURVE:
AUX UV1 DELAY:
AND RUN
SETTING
t
AUX UV1 MINIMUM
VOLTAGE:
<
Vx Minimum
SETTING GROUP 1(6) VOLTAGE ELEMENTS
AUX OV1
FUNCTION: Disabled
AUX OV1 SIGNAL
SOURCE: SRC 1
AUX OV1 PICKUP:
0.300 pu
AUX OV1 PICKUP
DELAY: 1.00 s
AUX OV1 RESET
DELAY: 1.00 s
AUX OV1 BLOCK:
Off
AUX OV1 TARGET:
Self-reset
AUX OV1 EVENTS:
Disabled
AUXILIARY VT X5 SECONDARY
L90 Line Current Differential System
5.6 GROUPED ELEMENTS
FLEXLOGIC OPERANDS
<
Vx Pickup
AUX UV1 PKP
AUX UV1 DPO
AUX UV1 OP
V
827849A2.CDR
AUXILIARY OV1(2)
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0.000 to 3.000 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic™ operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
is the per-unit (pu) base used when setting the
5
SYSTEM
5-201