21
Magtrol Model 6530 Three-Phase Power Analyzer
Chapter 3 – Installation/Configuration
SETUP
3-Phase, 4-Wire
•
Measures three-phase power.
•
Utilizes all three phases.
•
The Power Factor is derived from the following equations:
Amps
Σ
= (A
1
+ A
2
+ A
3
)/3, Volts
Σ
= (V
1
+ V
2
+ V
3
)/3
Active Power =
Σ
W = W
1
+ W
2
+ W
3
Apparent Power =
(V
rms1
× A
rms1
) + (V
rms2
× A
rms2
) + (V
rms3
× A
rms3
) = V
1
A
1
+ V
2
A
2
+ V
3
A
3
Power Factor =
Σ
W/( V
1
A
1
+ V
2
A
2
+ V
3
A
3
)
The following diagrams show the connections for 3-Phase, 4-Wire measurement.
LOAD
V
V
1
±
V
R
T
S
±
A
±
V
3
SOURCE
A
±
A
2
V
2
V
±
±
A
3
A
LOAD
N
T
R
S
SOURCE
Ø2
Ø3
Ø1
A
V
±
±
A
V
±
±
A
V
±
±
A
1
Figure 3–14 Three-Phase, Four-Wire Wiring Schematic
Ø3
Ø2
Ø1
NEUTRAL
CB
MOV
LOAD
MOV
MOV
LOAD
LOAD
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 3–15 Three-Phase, Four-Wire Wiring Connection
