Setting Of Timers For Distance Protection Zones; Phase Selection, Quad, Fixed Angle, Load Encroachment Fdpspdis (21); Identification - ABB RELION 670 SERIES Applications Manual

Line distance protection

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Table of Contents

1MRK 506 369-UUS -

Line distance protection REL670 2.2 ANSI

Application manual

The default setting of IMinPUPP and IMinPUPG is 20% of IBase where IBase is the

chosen base current for the analog input channels. The value has been proven in practice

to be suitable in most of the applications. However, there might be applications where it

is necessary to increase the sensitivity by reducing the minimum operating current down

to 10% of IED base current. This happens especially in cases, when the IED serves as a

remote back-up protection on series of very long transmission lines.

If the load current compensation is activated, there is an additional criteria IMinOpIR that

will block the phase-ground loop if the 3I0<IMinOpIR. The default setting of IMinOpIR

is 5% of the IED base current IBase.

The minimum operating fault current is automatically reduced to 75% of its set value, if

the distance protection zone has been set for the operation in reverse direction.

Setting of timers for distance protection zones

The required time delays for different distance-protection zones are independent of each

other. Distance protection zone1 can also have a time delay, if so required for selectivity

reasons. One can set the time delays for all zones (basic and optional) in a range of 0 to 60

seconds. The tripping function of each particular zone can be inhibited by setting the

corresponding Operation parameter to Disabled. Different time delays are possible for the

ph-E (tPG) and for the ph-ph (tPP) measuring loops in each distance protection zone

separately, to further increase the total flexibility of a distance protection.

Phase selection, quad, fixed angle, load encroachment

FDPSPDIS (21)

Function description

Phase selection, quad, fixed angle, load

encroachment

Impedance protection

identification

SYMBOL-DD V1 EN

ANSI/IEEE C37.2

device number