Power Swing; Other Protection Considerations - Settings Example; Distance Protection Setting Example - GE MiCOM P40 Agile Technical Manual

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Application Notes

MiCOM P40 Agile P442, P444

Figure 48: Loss-of-load accelerated trip scheme

For circuits with load tapped off the protected line, care must be taken in setting the loss of

load feature to ensure that the I< level detector setting is above the tapped load current.

When selected, the loss of load feature operates in conjunction with the main distance

scheme that is selected. In this way it provides high speed clearance for end zone faults

when the Basic scheme is selected or, with permissive signal aided tripping schemes, it

provides high speed back-up clearance for end zone faults if the channel fails.

Note: Loss of load tripping is only available where 3 pole tripping is used.

Power Swing

See section 4.1.

To protect the 100km double circuit line between the Green Valley and Blue River

substations using relay protection in the POP Z2 Permissive Overreach mode and to set the

relay at Green Valley substation, as shown in Figure 49.

P44x/EN AP/Hb6