Function Block - ABB Relion 670 Series Technical Reference Manual

1MRK 505 208-UEN B
5.1.4.4
Technical reference manual
1. On: when this mode is selected the sensitive differential algorithm is in
operation. Note that the input signal ENSENS must have logical value
one in order to get operation from the sensitive differential algorithm
2. Off: when this mode is selected the sensitive differential algorithm is out
of operation
• SensOperLevel: this setting determines the minimum start level for the
sensitive differential algorithm. It shall be entered directly in primary amperes.
Default value 200A.
• SensIinBlock: this setting determines the incoming current level (bus through-
going current level) above which the sensitive differential algorithm is
automatically blocked. It shall be entered directly in primary amperes. Default
value 1000A
• tSensDiff: this delay on start timer is used in order to delay the action of the
sensitive differential algorithm. Time delay can be set from 0.000s to 60.000s
in step of 0.001s. Default value is 0.400s

Function block

BZNTPDIF_A
BLOCK TRIP
BLKST TRIPL1
TRZONE TRIPL2
RSTTRIP TRIPL3
RSTOCT TREXTBAY
ENSENS TREXTZ
TRSENSL1
TRSENSL2
TRSENSL3
OCT
SOCTL1
SOCTL2
SOCTL3
FOCTL1
FOCTL2
FOCTL3
ALDIFFL1
ALDIFFL2
ALDIFFL3
ALIINL1
ALIINL2
ALIINL3
IIN_ZAL1
IINRNGL1
IIN_ZAL2
IINRNGL2
IIN_ZAL3
IINRNGL3
ID_ZAL1
IDRNGL1
ID_ZAL2
IDRNGL2
ID_ZAL3
IDRNGL3
IDFRMSL1
IDFRMSL2
IDFRMSL3
IEC06000159-2-en.vsd
IEC06000159 V2 EN
Figure 50: BZNTPDIF function block (Differential Zone A, 3ph). Also
applicable for Differential Zone B, 3ph
Section 5
Differential protection
107