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6 FUNCTIONAL TESTS (USER SETTINGS)
(305), Z3GRDREACH = [________] (Zone 3)
(406), Z4GRDREACH = [________] (Zone 4)
(111), Z1GCHARANG = [________] (Fixed at 90° for Zone1 on single-phase tripping models)
(207), Z2GCHARANG = [________] (Zone 2)
(306), Z3GCHARANG = [________] (Zone 3)
(406), Z4GCHARANG = [________] (Zone 4)
(108), Z1GROUNDK0 = [________] (Zone 1 only)
(1404), ZEROSEQK0 = [________] (Zones 2-4)
2.
Determine the test current, I
FOR PHASE-TO-GROUND REACH below.
I
(Z1GR) = [________] Amps rms
T
I
(Z2GR) = [________] Amps rms
T
I
(Z3GR) = [________] Amps rms
T
I
(Z4GR) = [________] Amps rms
T
Table 6–1: TEST CURRENT RANGES FOR PHASE-TO-GROUND REACH
Z
REACH
I
R
T
( I
= 5 A)
N
0.1 to 2.5
10
2.5 to 6.0
7
6.0 to 12.0
3.5
12.0 to 20.0
2.1
20.0 to 30.0
1.4
30.0 to 40.0
0.8
40.0 to 50.0
1.0
3.
Calculate the impedance, Z , for each zone, where Z equals the magnitude of the expression:
POSSEQANG
2
∠
-- -
3
The real and imaginary components of Z are given by
2
Z ( )
real
cos
=
-- -
3
2
Z ( )
imag
=
-- -
sin
3
The magnitude is then given by:
2
Z ( )
Z
real
=
+
The settings are:
Z
= [________] (Zone magnitude)
1
Z
= [________] (magnitude of Zones 2, 3, and 4)
n
GE Power Management
, for Zone 1, Zone 2, Zone 3, and Zone 4 from Table 6–1: TEST CURRENT RANGES
T
(A)
Z
REACH
R
( I
= 1 A)
N
0.5 to 12.5
12.5 to 30.0
30.0 to 60.0
60.0 to 100.0
100.0 to 150.0
150.0 to 200.0
200.0 to 250.0
K
ZERSEQANG
0
∠
+
----- -
3
K
(
)
0
(
POSSEQANG
cos
ZERSEQANG
+
----- -
3
K
(
)
0
(
POSSEQANG
+
------
sin
ZERSEQANG
3
2
Z ( )
imag
(eq. 6–23)
ALPS Advanced Line Protection System
6.5 ZONE REACH TESTS
I
(A)
T
2
1.4
0.7
0.4
0.3
0.2
0.2
)
(eq. 6–21)
)
(eq. 6–22)
6
6-11
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