Siemens SIPROTEC 7SA6 Manual page 215

Distance protection relay for all voltage levels

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Setting Title

FullScaleVolt.

FullScaleCurr.

C53000-G1176-C156-2

Multiple fault on a double-circuit line next to a generato

Address 1156A Trip2phFlt determines that the short-circuit protection functions

perform only a single-pole trip in case of isolated two-phase faults (clear of ground),

provided that single-pole tripping is possible and permitted. This allows a single-pole

rapid automatic reclosure cycle for this kind of fault. The trip type can be set to 1pole

leading phase or 1pole lagging phase. The parameter is only available in ver-

sions with single-pole tripping. This setting can only be modified with DIGSI

"Additional Settings". If this option is used, it must be born in mind that the phase

preference should be the same throughout the entire network and that it must be the

same at all ends of one line. More information on the function is also contained in Sec-

tion 6.22.3 Overall Fault Detection Logic of the Device. The default setting is triple-

Note: The indicated secondary current values and values of impedance for setting

ranges and default settings refer to I

values are to be multiplied by 5. The values of impedance are divided by 5.

Addresses which have an „A" attached to its end can only be changed with DIGSI

in "Additional Settings".

Setting Options

1.0..1200.0 kV; 0

0.0050..6.5000 Ohm / km

1.0..1000.0 km

0.0050..10.0000 Ohm / mile

0.6..650.0 Miles

= 1 A. For the nominal current 5 A the current

Default Setting

0.1500 Ohm / km

0.2420 Ohm / mile x' - Line Reactance per length

Measurement: Full Scale

Voltage (100%)

Measurement: Full Scale Cur-

x' - Line Reactance per length

Zero seq. comp. factor RE/RL

Zero seq. comp. factor XE/XL for