Setting Guidelines - ABB RELION 670 SERIES Applications Manual

Section 9
Current protection
9.4.3
9.4.3.1
510

Setting guidelines

When inverse time overcurrent characteristic is selected, the trip time of
the stage will be the sum of the inverse time delay and the set definite time
delay. Thus, if only the inverse time delay is required, it is important to set
the definite time delay for that stage to zero.
The parameters for the four step residual overcurrent protection are set via the local HMI
or PCM600. The following settings can be done for the function.
Common base IED values for primary current (IBase), primary voltage (UBase) and
primary power (SBase) are set in the global base values for settings function GBASVAL.
GlobalBaseSel: This is used to select GBASVAL function for reference of base values.
SeqTypeUPol: This is used to select the type of voltage polarising quantity i.e. Zero seq
and Neg seq for direction detection.
SeqTypeIPol: This is used to select the type of current polarising quantity i.e. Zero seq and
Neg seq for direction detection.
SeqTypeIDir: This is used to select the type of operating current quantity i.e. Zero seq and
Neg seq for direction detection.
Common settings for all steps
AngleRCA: Relay characteristic angle given in degree. This angle is defined as shown in
Figure 263. The angle is defined positive when the residual current lags the reference
voltage (Vpol = 3V or V
0
)
2
1MRK 506 369-UUS -
Line distance protection REL670 2.2 ANSI
Application manual