ABB REG650 Technical Manual page 169

Generator protection

Hide thumbs Also See for REG650:

Table of Contents

1MRK 502 034-UEN -

Technical Manual

Directional element will be internally enabled to operate as soon as Iop is

bigger than 40% of IN>Dir and directional condition is fulfilled in set direction.

Relay characteristic angle AngleRCA, which defines the position of forward

and reverse areas in the operating characteristic.

Directional comparison step, built-in within directional supervision element, will

set EF4PTOC function output binary signals:

STFW=1 when operating quantity magnitude Iop x cos(φ - AngleRCA) is

bigger than setting parameterIN>Dir and directional supervision element

detects fault in forward direction.

STRV=1 when operating quantity magnitude Iop x cos(φ - AngleRCA) is

bigger than 60% of setting parameter IN>Dir and directional supervision

element detects fault in reverse direction.

These signals shall be used for communication based earth-fault teleprotection

communication schemes (permissive or blocking).

Simplified logic diagram for directional supervision element with integrated

directional comparison step is shown in figure 85:

Current protection