ABB REL650 - Directional Underpower Protection GUPPDUP (37)

7.15.3 Directional underpower protection GUPPDUP (37)
7.15.3.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Directional underpower protection GUPPDUP
P <
2
SYMBOL-LL V2 EN
37
7.15.3.2 Setting guidelines
GlobalBaseSel: Selects the global base value group used by the function to define (IBase),
(VBase) and (SBase).
Operation: With the parameter Operation the function can be set Enabled/Disabled.
Mode: The voltage and current used for the power measurement. The setting possibilities
are shown in table 15.
For reverse power applications PosSeq or Arone modes are strongly recommended.
Table 15: Complex power calculation
Set value
Mode Formula used for complex power calculation
A, B, C
* * *
A A B B C C
S V I V I V I= × + × + ×
EQUATION2055-ANSI V1 EN (Equation 153)
Arone
* *
AB A BC C
S V I V I= × - ×
EQUATION2056-ANSI V1 EN (Equation 154)
PosSeq
*
3
PosSeq PosSeq
S V I= × ×
EQUATION2057-ANSI V1 EN (Equation 155)
AB
* *
( )
AB A B
S V I I= × -
EQUATION2058-ANSI V1 EN (Equation 156)
BC
* *
( )
BC B C
S V I I= × -
EQUATION2059-ANSI V1 EN (Equation 157)
Table continues on next page
Section 7 1MRK 506 334-UUS A
Current protection
248
Application manual