SeqTypeUPol
: This is used to select the type of voltage polarising quantity i.e. Zero
seq or Neg seq for direction detection.
SeqTypeIPol
: This is used to select the type of current polarising quantity i.e. Zero
seq or Neg seq for direction detection.
SeqTypeIDir
: This is used to select the type of operating current quantity i.e. Zero
seq or Neg seq for direction detection.
8.2.2.1
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 (Upol = 3U
0
or U
2
)
Upol = -3U
0
or
IN>Dir
RCA
Operation
-3U
2
IEC05000135-5-en.vsdx
IEC05000135 V5 EN-US
Figure 55:
Relay characteristic angle given in degree
In a normal transmission network a normal value of RCA is about 65°. The setting
range is -180° to +180°.
polMethod
: Defines if the directional polarization is from
•
Voltage
(3U
0
or U
2
)
•
Current
(3I
0
· ZNpol or 3I
2
·ZNpol where ZNpol is RNpol + jXNpol), or
•
both currents and voltage,
Dual
(dual polarizing, (3U
0
+ 3I
0
· ZNpol) or (U
2
+
I
2
· ZNpol)).
Normally voltage polarizing from the internally calculated residual sum or an
external open delta is used.
1MRK 511 407-UEN C
Section 8
Current protection
Phasor measurement unit RES670 2.2 IEC
135
Application manual
Summary of Contents for Relion RES670
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