Delta U And Delta I; Dead Line Detection; Fuse Failure Supervision Vdspvc; Identification - ABB Relion REC670 Applications Manual

1MRK 511 358-UEN A
12.2.3.5

Delta U and delta I

Set the operation mode selector
The setting of
DI< low (approximately 10% of IBase ) to avoid unwanted operation due to normal switching
conditions in the network. The delta current and delta voltage function shall always be used
together with either the negative or zero sequence algorithm. If
for operation of dU/dt and
DU> and DI< will be given according to equation
> =
DU
EQUATION1523 V3 EN-US
ISet
< =
DI
EQUATION1524 V4 EN-US
The voltage thresholds
below the minimum operating voltage that might occur during emergency conditions. A
setting of approximately 70% of
The current threshold
function. A 5...10% lower value is recommended.
12.2.3.6

Dead line detection

The condition for operation of the dead line detection is set by the parameters
current threshold and
Set the
margin of at least 15-20% is recommended. The operate value must however exceed the
maximum charging current of an overhead line, when only one phase is disconnected (mutual
coupling to the other phases).
Set the
safety margin of at least 15% is recommended.
12.3

Fuse failure supervision VDSPVC

12.3.1

Identification

Function description
Fuse failure supervision
12.3.2

Application

Some protection functions operate on the basis of measured voltage at the relay point.
Examples of such protection functions are distance protection function, undervoltage function
Application manual
DU> should be set high (approximately 60% of UBase ) and the current threshold
ISet
USet
prim
.
100
UBase
prim
.
100
IBase
UPh> is used to identify low voltage condition in the system. Set UPh>
IPh> shall be set lower than the IMinOp for the distance protection
UDLD< for the voltage threshold.
IDLD< with a sufficient margin below the minimum expected load current. A safety
UDLD< with a sufficient margin below the minimum expected operating voltage. A
OpDUDI to On if the delta function shall be in operation.
the primary current for operation of dI/dt, the setting of
prim
115 and equation 116.
UBase is recommended.
IEC 61850 IEC 60617
identification identification
VDSPVC VTS
Secondary system supervision
GUID-02336F26-98C0-419D-8759-45F5F12580DE v7
USet
is the primary voltage
prim
(Equation 115)
(Equation 116)
IDLD< for the
GUID-9C5BA1A7-DF2F-49D4-A13A-C6B483DDFCDC v2
GUID-109434B0-23E5-4053-9E6E-418530A07F9C v2
ANSI/IEEE C37.2
device number
60
GUID-AD63BF6C-0351-4E48-9FB2-9AB5CF0C521E v2
Section 12
M13683-78 v4
221