GE D60 Instruction Manual page 366

5.6 GROUPED ELEMENTS
h) COMPENSATED OVERVOLTAGE (ANSI 59P, IEC PTOV)
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PATH: SETTINGS GROUPED ELEMENTS
 COMPENSATED
 OVERVOLTAGE
5
The compensated overvoltage function is intended to provide protection against an overvoltage due to the opening of the
remote terminal of a transmission line – the so called the Ferranti effect. This could be achieved using a transfer-tripping
scheme. However, with high voltage, more corona may exist on the line and inhibit the proper reception of a carrier-trans-
fer-trip signal. Also, the presence of a line with an open terminal in weak systems can raise the voltage level of the local
bus. Detecting and tripping a line with an open terminal can prevent tripping at the local bus in this case.
5-234
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SETTING GROUP 1(6)
COMPENSATED OV
FUNCTION: Disabled
COMPENSATED OV
MESSAGE
SOURCE: SRC 1
COMPENSATED OV Zc
MESSAGE
MAG: 2.00 Ω
COMPENSATED OV Zc
MESSAGE
ANG: 90°
COMPENSATED OV
MESSAGE
I_1max: 0.20 pu
COMPENSATED OV STG1
MESSAGE
PICKUP: 1.300 pu
COMPENSATED OV STG1
MESSAGE
DELAY: 1.00 s
COMPENSATED OV STG2
MESSAGE
PICKUP: 1.300 pu
COMPENSATED OV STG2
MESSAGE
DELAY: 1.00 s
COMPENSATED OV STG3
MESSAGE
PICKUP: 1.300 pu
COMPENSATED OV STG3
MESSAGE
DELAY: 1.00 s
COMPENSATED OV BLK:
MESSAGE
Off
COMPENSATED OV
MESSAGE
TARGET: Self-reset
COMPENSATED OV
MESSAGE
EVENTS: Disabled
Figure 5–125: TRANSMISSION LINE WITH REMOTE TERMINAL OPEN
D60 Line Distance Protection System
 
VOLTAGE ELEMENTS COMPENSATED OVERVOLTAGE
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0.00 to 500.00 ohms in steps of 0.01
Range: 30 to 90° in steps of 1
Range: 0.01 to 1.00 pu in steps of 0.01
Range: 0.250 to 3.000 pu in steps of 0.01
Range: 0.00 to 600.00 seconds in steps of 0.01
Range: 0.250 to 3.000 pu in steps of 0.01
Range: 0.00 to 600.00 seconds in steps of 0.01
Range: 0.250 to 3.000 pu in steps of 0.01
Range: 0.00 to 600.00 seconds in steps of 0.01
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5 SETTINGS
GE Multilin