Functions
2.16 Underexcitation (Loss-of-Field) Protection (ANSI 40)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
143
2.16.3 Settings
Addresses which have an appended "A" can only be changed with DIGSI, under Additional Settings.
Addr. Parameter Setting Options Default Setting Comments
3001 UNDEREXCIT. OFF
ON
Block relay
OFF Underexcitation Protection
3002 1/xd CHAR. 1 0.20 .. 3.00 0.41 Susceptance Intersect Character-
istic 1
3003 ANGLE 1 50 .. 120 ° 80 ° Inclination Angle of Characteristic
1
3004 T CHAR. 1 0.00 .. 60.00 sec; ∞ 10.00 sec Characteristic 1 Time Delay
3005 1/xd CHAR. 2 0.20 .. 3.00 0.36 Susceptance Intersect Character-
istic 2
3006 ANGLE 2 50 .. 120 ° 90 ° Inclination Angle of Characteristic
2
3007 T CHAR. 2 0.00 .. 60.00 sec; ∞ 10.00 sec Characteristic 2 Time Delay
3008 1/xd CHAR. 3 0.20 .. 3.00 1.10 Susceptance Intersect Character-
istic 3
3009 ANGLE 3 50 .. 120 ° 90 ° Inclination Angle of Characteristic
3
3010 T CHAR 3 0.00 .. 60.00 sec; ∞ 0.30 sec Characteristic 3 Time Delay
3011 T SHRT Uex< 0.00 .. 60.00 sec; ∞ 0.50 sec T-Short Time Delay (Char. &
Uexc<)
3012 EXCIT. VOLT. ON
OFF
OFF State of Excitation Volt. Supervi-
sion
3013 Uexcit. < 0.50 .. 8.00 V 2.00 V Excitation Voltage Superv. Pickup
3014A Umin 10.0 .. 125.0 V 25.0 V Undervoltage blocking Pickup
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