DI
ISet
IBase
prim
< =
100
.
EQUATION1524 V4 EN-US
(Equation 41)
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.
9.1.3.6
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.
1MRK 505 388-UEN B
Section 9
Secondary system supervision
Busbar protection REB650 2.2 IEC
149
Application manual
Summary of Contents for REB650
Page 1: ...RELION 650 SERIES Busbar protection REB650 Version 2 2 Application manual...
Page 2: ......
Page 18: ...12...
Page 28: ...22...
Page 38: ...32...
Page 78: ...72...
Page 96: ...90...
Page 136: ...130...
Page 150: ...144...
Page 156: ...150...
Page 232: ...226...
Page 278: ...272...
Page 298: ...292...
Page 310: ...304...
Page 320: ...314...
Page 321: ...315...