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ABB Relion 670 Series Technical Reference Manual page 799

Line differential protection ansi

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Technical reference manual

Unblock =

Off

CR

Unblock =

NoRestart

Unblock =

Restart

0-tSecurity

CR_GUARD

NOT

0

200ms

0

SchemeType =

Intertrip

CSUR

tSendMin

BLOCK

CS_STOP

CRL

Schemetype =

Permissive UR

PLTR_CRD

Schemetype =

Permissive OR

CSOR

tSendMin

SchemeType =

Blocking

BLKCS

ANSI05000515 V1 EN

Figure 389:

Scheme communication logic for distance or overcurrent protection,

simplified logic diagram

AND

150ms

AND

OR

0

AND

OR

AND

OR

AND

AND

OR

AND

AND

OR

AND

AND

Section 13

Scheme communication

OR

AND

AND

OR

0-tCoord

0

OR

0

25ms

en05000515_ansi.vsd

CRL

CRL

LCG

CS

TRIP

793

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