5. ACTUAL VALUES
A2 METERING DATA
5-13
5.3.9
PHASORS
y
3+$6256
y
>(17(5@
#
IRU
#
PRUH
Õ
Õ
Õ
Õ
ENTER
ENTER
ENTER
ENTER
ESCAPE
ESCAPE
ESCAPE
ESCAPE
Ö
Ö
Ö
Ö
9D
#
3+$625
=
313(#
DW
######3
ƒ
#
/DJ
Û
Û
Û
Û
ESCAPE
ESCAPE
ESCAPE
ESCAPE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
Ú
Ú
Ú
Ú
9E
#
3+$625
=
313(#
DW
######3
ƒ
#
/DJ
Û
Û
Û
Û
ESCAPE
ESCAPE
ESCAPE
ESCAPE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
Ú
Ú
Ú
Ú
9F
#
3+$625
=
313(#
DW
######3
ƒ
#
/DJ
Û
Û
Û
Û
ESCAPE
ESCAPE
ESCAPE
ESCAPE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
Ú
Ú
Ú
Ú
,D
#
3+$625
=
313(#
DW
######3
ƒ
#
/DJ
Û
Û
Û
Û
ESCAPE
ESCAPE
ESCAPE
ESCAPE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
Ú
Ú
Ú
Ú
,E
#
3+$625
=
313(#
DW
######3
ƒ
#
/DJ
Û
Û
Û
Û
ESCAPE
ESCAPE
ESCAPE
ESCAPE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
×
×
×
×
,F
#
3+$625
=
313(#
DW
######3
ƒ
#
/DJ
DESCRIPTION:
To aid in wiring the following table can be used to determine if VTs and CTs are on the correct phases and that their polarity is correct.
Problems arising from incorrect wiring are extremely high unbalance levels (CTs) or erroneous power readings (CTs and VTs) or phase
reversal trips (VTs).
To correct wiring simply start the motor and record the phasors. Using the table below along with recorded phasors, system rotation, VT
connection type and motor power factor the correct phasors can be determined. Note that Va (Vab if delta) is always assumed to be
zero degrees and is the reference for all angle measurements.
Common problems include: Phase currents 180 degrees from proper location (CT polarity reversed)
Phase currents or voltages 120 or 240 degrees out (CT/VT on wrong phase)
3
∅
∅
∅
∅
Wye VT Connection
ABC Rotation
72.5
°°°°
=0.3 pf lag
45
°°°°
=0.7 pf lag
0
°°°°
=1.00 pf
-45
°°°°
=0.7 pf lead
-72.5
°°°°
=0.2 pf lead
Va
0
0
°
lag
0
°
lag
0
°
lag
0
Vb
120
120
120
120
120
Vc
240
240
240
240
240
Ia
75
45
0
315
285
Ib
195
165
120
75
45
Ic
315
285
240
195
165
kW
+
+
+
+
+
kVAR
+
+
0
-
-
kVA
+
+
+ (=kW)
+
+
ACB Rotation
72.5
°°°°
=0.3 pf lag
45
°°°°
= 0.7 pf lag
0
°°°°
= 1.00 pf
-45
°°°°
= 0.7 pf lead
72.5
°°°°
=0.2 pf lead
Va
0
0
°
lag
0
°
lag
0
°
lag
0
Vb
240
240
240
240
240
Vc
120
120
120
120
120
Ia
75
45
0
315
285
Ib
315
285
240
195
165
Ic
195
165
120
75
45
kW
+
+
+
+
+
kVAR
+
+
0
-
-
kVA
+
+
+ (=kW)
+
+
Summary of Contents for SR469
Page 7: ......
Page 19: ...2 INSTALLATION MECHANICAL 2 5 2 1 5 TERMINAL LOCATIONS Figure 2 11 TERMINAL LAYOUT...
Page 21: ...2 INSTALLATION ELECTRICAL 2 7 Figure 2 12 TYPICAL WIRING DIAGRAM...
Page 32: ...ELECTRICAL 2 INSTALLATION 2 18 2 2 14 TYPICAL 2 SPEED MOTOR WIRING...
Page 39: ...OVERVIEW 3 SR469 OPERATION 3 6 yy SETPOINTS yy S1 SR469 SETUP...
Page 104: ...4 SETPOINT PROGRAMMING S11 MONITORING 4 65 Figure 4 24 TRIP COIL SUPERVISION...
Page 113: ...S12 ANALOG I O 4 SETPOINT PROGRAMMING 4 74...
Page 244: ...8 469PC PROGRAM WAVEFORM CAPTURE 8 13 Figure 8 11 WAVEFORM CAPTURE...