ABB Relion 670 Series RES670, Technical Manual

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• Type of reset characteristic ( Instantaneous / IEC Reset / ANSI reset ).By this
parameter setting it is possible to select the reset characteristic of the stage. For the
complete list of available reset curves, refer to Chapter
""
• Time delay related settings. By these parameter settings the properties like definite
time delay, minimum operating time for inverse curves, reset time delay and
parameters to define user programmable inverse curve are defined.
• Multiplier for scaling of the set negative sequence current pickup value by external
binary signal. By this parameter setting it is possible to increase negative sequence
current pickup value when function binary input MULTPUx has logical value 1.
Simplified logic diagram for one negative sequence overcurrent stage is shown in the
following figure:
ANSI09000684 V1 EN
Figure 63: Simplified logic diagram for negative sequence overcurrent stage x , where x=1, 2, 3 or 4
NS4PTOC (4612) can be completely blocked from the binary input BLOCK. The pickup
signals from NS4PTOC (4612) for each stage can be blocked from the binary input
BLKx. The trip signals from NS4PTOC (4612) can be blocked from the binary input
BLKTR.
1MRK 511 365-UUS A
Section 8
Current protection
Phasor measurement unit RES670 2.1 ANSI 223
Technical manual