6-16
F35 Multiple Feeder Protection System
GE Multilin
6.3 METERING
6 ACTUAL VALUES
6
DELTA-CONNECTED INSTRUMENT TRANSFORMERS:
The zero-sequence voltage is not measurable under the Delta connection of instrument transformers and is defaulted to
zero. The table below shows an example of symmetrical components calculations for the ABC phase rotation.
*
The power system voltages are phase-referenced – for simplicity – to
VAG
and
VAB
, respectively. This, however, is a
relative matter. It is important to remember that the F35 displays are always referenced as specified under
SETTINGS
SYSTEM SETUP
POWER SYSTEM
FREQUENCY AND PHASE REFERENCE
.
The example above is illustrated in the following figure.
Figure 6–3: MEASUREMENT CONVENTION FOR SYMMETRICAL COMPONENTS
•
ABC phase rotation:
•
ACB phase rotation:
Table 6–1: SYMMETRICAL COMPONENTS CALCULATION EXAMPLE
SYSTEM VOLTAGES, SEC. V *
VT
CONN.
RELAY INPUTS, SEC. V
SYMM. COMP, SEC. V
V
AG
V
BG
V
CG
V
AB
V
BC
V
CA
F5AC
F6AC
F7AC
V
0
V
1
V
2
13.9
∠
0°
76.2
∠
–125°
79.7
∠
–250°
84.9
∠
–313°
138.3
∠
–97°
85.4
∠
–241°
WYE
13.9
∠
0°
76.2
∠
–125°
79.7
∠
–250°
19.5
∠
–192°
56.5
∠
–7°
23.3
∠
–187°
UNKNOWN (only
V
1 and
V
2
can be determined)
84.9
∠
0°
138.3
∠
–144°
85.4
∠
–288°
DELTA
84.9
∠
0°
138.3
∠
–144°
85.4
∠
–288°
N/A
56.5
∠
–54°
23.3
∠
–234°
V_0
N/A
=
V_1
1
30
–
°
∠
3 3
--------------------
V
AB
aV
BC
a
2
V
CA
+
+
(
)
=
V_2
1 30
°
∠
3 3
-----------------
V
AB
a
2
V
BC
aV
CA
+
+
(
)
=
V_0
N/A
=
V_1
1 30
°
∠
3 3
-----------------
V
AB
a
2
V
BC
aV
CA
+
+
(
)
=
V_2
1
30
–
°
∠
3 3
--------------------
V
AB
aV
BC
a
2
V
CA
+
+
(
)
=
827844A1.CDR
A
B
C
WYE
VTs
1
0
2
A
B
C
DE
LTA VTs
1
2
SYST
E
M
V
OLTAG
E
S
SYMM
E
TR
I
CAL
COMPO
NEN
TS
UR phase angle
reference
UR phase angle
reference
UR phase angle
reference
UR phase angle
reference
Summary of Contents for UR F35 Series
Page 10: ...x F35 Multiple Feeder Protection System GE Multilin TABLE OF CONTENTS ...
Page 366: ...5 238 F35 Multiple Feeder Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 426: ...10 12 F35 Multiple Feeder Protection System GE Multilin 10 6 DISPOSAL 10 MAINTENANCE 10 ...
Page 454: ...A 28 F35 Multiple Feeder Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 620: ...F 12 F35 Multiple Feeder Protection System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...
Page 630: ...H 8 F35 Multiple Feeder Protection System GE Multilin H 3 WARRANTY APPENDIX H H ...
Page 640: ...x F35 Multiple Feeder Protection System GE Multilin INDEX ...