6.4.7
Technical data
Table 48:
ZDARDIR (21D) technical data
Function
Range or value
Accuracy
Mimimum operating current, I
(5 – 200)% of IBase
< ±1.0% of I
n
, for I<I
n
,
±1.0% of I, for I>I
n
Minimum polarizing current, IPol
(5 – 100)% of IBase
< ±1.0% of I
n
Minimum polarizing voltage, VPol (4 – 100)% of VBase
< ±0.5% of V
n
Relay characteristic angle,
AngleRCA
(-90 – 90) degrees
< ±2.0 degrees
6.5
Directional impedance quadrilateral and mho
ZDNRDIR (21D)
6.5.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Directional impedance quadrilateral and
mho
ZDNRDIR
-
21D
6.5.2
Functionality
The evaluation of the direction to the fault is made in the directional element ZDNRDIR
(21D) for the quadrilateral and mho characteristic distance protections ZQMPDIS (21).
6.5.3
Function block
ANSI09000056-1-en.vsd
ZDNRDIR (21D)
I3P*
V3P*
DIR_POL
STDIRCND
ANSI09000056 V1 EN
Figure 77:
ZDNRDIR (21D) function block
1MRK 506 335-UUS A
Section 6
Impedance protection
165
Technical manual
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