9.4.3
Setting guidelines
IP14988-1 v1
M15282-3 v11
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.
9.4.3.1
Common settings for all steps
M15282-81 v10
AngleRCA
: Relay characteristic angle given in degree. This angle is defined as shown
in Figure
. The angle is defined positive when the residual current lags the
reference voltage (Vpol = 3V
0
or V
2
)
1MRK 502 071-UUS A
Section 9
Current protection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
365
Application manual
Summary of Contents for RELION 670 SERIES REG670
Page 1: ...RELION 670 SERIES Generator protection REG670 Version 2 2 ANSI Application manual ...
Page 2: ......
Page 44: ...38 ...
Page 66: ...60 ...
Page 102: ...96 ...
Page 200: ...194 ...
Page 442: ...436 ...
Page 486: ...480 ...
Page 508: ...502 ...
Page 514: ...508 ...
Page 524: ...518 ...
Page 658: ...652 ...
Page 736: ...730 ...
Page 774: ...768 ...
Page 828: ...822 ...
Page 829: ...823 ...