GE L30 Instruction Manual page 329

5 SETTINGS
Figure 5–85: NEGATIVE-SEQUENCE OVERVOLTAGE SCHEME LOGIC
e) AUXILIARY UNDERVOLTAGE (ANSI 27X, IEC PTUV)
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PATH: SETTINGS GROUPED ELEMENTS
 AUXILIARY UV1
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The L30 contains one auxiliary undervoltage element for each VT bank. This element is intended for monitoring undervolt-
age conditions of the auxiliary voltage. The
ment starts timing. The nominal secondary voltage of the auxiliary voltage channel entered under
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SETUP AC INPUTS VOLTAGE BANK X5
pickup level.
The setting selects the minimum operating time of the auxiliary undervoltage element. Both
AUX UV1 DELAY
and settings establish the operating curve of the undervoltage element. The auxiliary undervoltage element
AUX UV1 DELAY
can be programmed to use either definite time delay or inverse time delay characteristics. The operating characteristics
and equations for both definite and inverse time delay are as for the phase undervoltage element.
GE Multilin
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SETTING GROUP 1(6) VOLTAGE ELEMENTS
AUX UV1
FUNCTION: Disabled
AUX UV1 SIGNAL
SOURCE: SRC 1
AUX UV1 PICKUP:
0.700 pu
AUX UV1 CURVE:
Definite Time
AUX UV1 DELAY:
1.00 s
AUX UV1 MINIMUM:
VOLTAGE: 0.100 pu
AUX UV1 BLOCK:
Off
AUX UV1 TARGET:
Self-reset
AUX UV1 EVENTS:
Disabled
selects the voltage level at which the time undervoltage ele-
AUX UV1 PICKUP
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AUXILIARY VT X5 SECONDARY
L30 Line Current Differential System
5.6 GROUPED ELEMENTS
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AUXILIARY UV1
Range: Disabled, Enabled
Range: SRC 1, SRC 2
Range: 0.000 to 3.000 pu in steps of 0.001
Range: Definite Time, Inverse Time
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.000 to 3.000 pu in steps of 0.001
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
SETTINGS
is the per-unit base used when setting the
5
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SYSTEM
AUX UV1 PICKUP
5-193