-3V
0
=V
ref
RCA = 0
°
Operate area
Instrument
transformer
angle error
3I
0
(prim)
3I
0
(to prot)
a
Characteristic after
angle compensation
RCAcomp
en06000651_ansi.vsd
ANSI06000651 V1 EN
Figure 17:
Explanation of RCAcomp
Operation mode 3I
0
· 3V
0
· cosφ
1.
Set the polarizing voltage to 1.2 ·
VNRelPU
and the phase angle between voltage
and current to the set characteristic angle (
RCADir
), the current lagging the voltage.
2.
Measure that the operate power is equal to the
SN_PU
setting for the set
directional element.
Note that for pick-up, both the injected current and voltage must be greater than
the set values
INRelPU
and
VNRelPU
respectively.
The function activates the BFI_3P and STDIRIN outputs.
3.
Measure with angles
j
=
RCADir
+/- 45° that the measuring element operates
when 3I
0
· 3V
0
· cos (
RCADir
-
j
) = 3I0 · 3V0 · cos(+/-45) =
SN_PU
.
4.
Compare the result with the set value. Take the set characteristic into
consideration, see figure
1MRK 506 331-UUS A
Section 6
Testing functionality
71
Commissioning Manual
Содержание Relion 650 Series REL650
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