ABB RET670 - Setting Parameters

VSetprim
DVPU 100
VBase
= ×
EQUATION1765-ANSI V1 EN (Equation 418)
100= ×
ISetprim
DIPU
IBase
ANSIEQUATION2385 V1 EN (Equation 419)
The voltage thresholds VPPU is used to identify low voltage condition in the system.
Set VPPU below the minimum operating voltage that might occur during emergency
conditions. A setting of approximately 70% of VBase is recommended.
The current threshold 50P shall be set lower than the IMinOp for the distance
protection function. A 5...10% lower value is recommended.
Dead line detection
The condition for operation of the dead line detection is set by the parameters IDLDPU
for the current threshold and VDLDPU for the voltage threshold.
Set the IDLDPU 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 VDLDPU with a sufficient margin below the minimum expected operating
voltage. A safety margin of at least 15% is recommended.
3.11.2.3 Setting parameters
Table 148: SDDRFUF Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Enabled Disable/Enable Operation
IBase 1 - 99999 A 1 3000 Base current
VBase 0.05 - 2000.00 kV 0.05 400.00 Base voltage
OpModeSel Disabled
V2I2
V0I0
V0I0 OR V2I2
V0I0 AND V2I2
OptimZsNs
- - V0I0 Operating mode selection
3V0PU 1 - 100 %VB 1 30 Pickup of residual overvoltage element in %
of VBase
Table continues on next page
Section 3 1MRK504116-UUS C
IED application
578
Application manual