ABB 615 series Technical Manual page 487

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615 series ANSI

Technical Manual

GUID-271C0849-2D46-44A9-A6C6-AA576F2A0DF6 V1 EN

Operation logic of the direct intertrip function

The pickup and trip signals are also provided separately for the low and high stages, and

in local and remote.

Blocking functionality

There are two independent inputs that can be used for blocking the function: BLOCK and

BLOCK_LS. The difference between these inputs is that BLOCK_LS (when TRUE)

blocks only the stabilized low stage leaving the instantaneous high stage operative.

BLOCK (when TRUE) blocks both stages and also the PROT_ACTIVE output is updated

according to the BLOCK input status, as described in the Fail safe function chapter.

Protection functions

Chapters

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