Operation Principle - Hitachi Relion 650 Series Technical Manual

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1MRK 511 557-UEN Rev. A

Operation principle

The ACBMSCBR function is active whenever Operation is set to "On" and the BLOCKFUNC input is

0 (or unconnected).

described below.

Technical Manual

Values (Range)

displays the overall functionality of ACBMSCBR. The different sub-functions are

Instantaneous current interrupted during

last open operation in this phase

Inrush current peak for this phase

Mechanical health indication based on

status of auxiliary contacts at conclusion

of CB operation

Predicted pre-arcing time for closing of

Adaptive correction offset for closing of

Adaptive extension of target arcing time

for opening of this phase

Switching target offset for handling

mechanical and electrical scatter in this

Temperature output

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