ABB Relion 650 Series Technical Manual page 108

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Impedance protection

communication schemes, for the protection of power lines and cables in complex network

configurations, such as parallel lines, multi-terminal lines and so on.

Function block

ANSI09000271 V1 EN-US

Figure 56: ZMOPDIS (21) function block

Table 26: ZMOPDIS (21) Input signals

ZMOPDIS (21)

ANSI09000271-1-en.vsd

Three phase group signal for current inputs

Three phase group signal for voltage inputs

Polarizing voltage for mho function

Blocks all operate output signals

Blocks phase-to-ground operation

Blocks phase-to-phase operation

Block due to fuse failure

Block of function

External directional condition

Faulted phase loop selection enable from phase selector

External blinder condition (loop enabler)

External load condition (loop enabler)

1MRK 506 326-UUS B

SEMOD154705-4 v4

PID-1479-INPUTSIGNALS v7

Line distance protection REL650

Technical manual