ABB RELION REX640 Technical Manual page 580

Protection and control

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Protection functions

separate fault type dedicated earth-fault functions which need to be coordinated.

Other advantages of MFADPSDE include versatile applicability, good selectivity,

good sensitivity and easy setting principles.

Three instances (stages) of MFADPSDE are available.

MFADPSDE Input signals

Table 617: MFADPSDE Input signals

MFADPSDE Output signals

Table 618: MFADPSDE Output signals

MFADPSDE Settings

Table 619: MFADPSDE Group settings (Basic)

Values (Range)

Directional mode

Table continues on the next page

Residual current

Residual voltage

Block signal for acti-

vating the blocking

External trigger to re-

lease neutral admit-

tance protection

External trigger to re-

set direction calcula-

Block signal for EF to indicate

opposite direction peaks

Intermittent earth-fault indi-

Current transient detection

Detected fault direction

Direction information

1MRS759142 F

Directional mode

Technical Manual