20
Magtrol Model 6530 Three-Phase Power Analyzer
Chapter 3 – Installation/Configuration
SETUP
3-Phase, 3-Wire
•
Measures three-phase power.
•
Utilizes input modules one and three.
•
The Power Factor is derived from the following equations:
Amps
Σ
= (A
1
+ A
3
)/2, Volts
Σ
= (V
1
+ V
3
)/2
Active Power =
Σ
W = W
1
+ W
3
(
(
(
)
)
)
)
Apparent Power =
3
2
V
rms
1
A
rms
1
×
V
rms
3
A
rms
3
×
=
+
(
3
2
V
1
A
1
V
3
A
3
+
Power Factor =
Σ
W
/
3
2
( V
1
A
1
+ V
3
A
3
)
The following diagrams show the connections for a 3-Phase, 3-Wire measurement. Notice that
only phase one and three are used.
LOAD
S
T
±
A
±
3
V
V
V
±
1
R
SOURCE
3
±
A
A
V
LOAD
SOURCE
R
S
T
Ø3
Ø1
A
V
±
±
A
V
±
±
A
1
Figure 3–12 Three-Phase, Three-Wire Wiring Schematic
MOV
LOAD
MOV
MOV
LOAD
LOAD
Ø2
Ø3
Ø1
LINE
CB
EARTH
A
N
A
L
O
G
O
U
T
P
U
T
A
±
±
V
±
V
±
V
±±
±
±
A
V
A
±
EXT.
SYNC.
EARTH
GROUND
20VA 50/60Hz
FUSE (5x20mm)
CAUTION: DOUBLE POLE FUSING
120V UL/CSA 250mA 250V SB
240V IEC 160mA 250V T
RS-232C
GPIB/IEEE-488
MAGTROL INC.
20 A
AMPS
750 V
VOLTS
MAX.
EXT.
MAX.
1000 V
MAX.
MAX.
±10 V
SENSOR
20 A
AMPS
750 V
VOLTS
MAX.
EXT.
MAX.
1000 V
MAX.
MAX.
±10 V
SENSOR
20 A
AMPS
750 V
VOLTS
MAX.
EXT.
MAX.
1000 V
MAX.
MAX.
±10 V
SENSOR
Figure 3–13 Three-Phase, Three-Wire Wiring Connection