The setting of DU> should be set high (approximately 60% of UBase) and the
current threshold 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 USet
prim
is the primary voltage for operation of dU/dt and
ISet
prim
the primary current for operation of dI/dt, the setting of DU> and DI< will
be given according to equation
531 and equation 532.
EQUATION1523 V3 EN-US (Equation 531)
EQUATION1524 V4 EN-US (Equation 532)
The voltage thresholds UPh> is used to identify low voltage condition in the
system. Set UPh> below the minimum operating voltage that might occur during
emergency conditions. A setting of approximately 70% of UBase is recommended.
The current threshold IPh> shall be set lower than the IMinOp for the distance
protection function. A 5...10% lower value is recommended.
14.2.3.6 Dead line detection
M13683-78 v4
The condition for operation of the dead line detection is set by the parameters
IDLD< for the current threshold and UDLD< for the voltage threshold.
Set the IDLD< with a sufficient margin below the minimum expected load current.
A safety 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 UDLD< with a sufficient margin below the minimum expected operating
voltage. A safety margin of at least 15% is recommended.
14.3 Fuse failure supervision VDSPVC
GUID-9C5BA1A7-DF2F-49D4-A13A-C6B483DDFCDC v2
14.3.1 Identification
GUID-109434B0-23E5-4053-9E6E-418530A07F9C v2
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Fuse failure supervision VDSPVC VTS 60
Section 14 1MRK 506 369-UEN B
Secondary system supervision
592 Line distance protection REL670 2.2 IEC
Application manual
To Next Page
Loading...
