Power Quality Analyzer PowerPad
®
IV Model 8345
31
Distribution system
Network
Electrical Diagram
Three-phase
3 wires
(L1, L2, and L3)
Indicate the current sensors
that will be connected: all 3
sensors (3A) or only 2 (A1 and
A2, A2 and A3, or A3 and A1).
If 3 sensors are connected,
the calculation will be
completed by the 3 wattmeters
with virtual neutral method.
If 2 sensors are connected,
the calculation will be done by
the Aron method.
For a 2-sensor connection,
the third sensor is not needed
if the other two sensors are
identical (same type, same
range, and same ratio).
Otherwise, the third sensor
must be connected for current
measurements.
Three-phase
3 wires
in star
L1
L2
L3
Three-phase
3 wires in delta
L1
L2
L3
Three-phase
3 wires
in open delta
L1
L2
L3
Three-phase
3 wires
in open delta
with link to earth
between phases
L1
L2
L3
Three-phase
3 wires
in open delta
with link to earth
on the phase
L1
L2
L3
Three-phase
3 wires
in open “high leg” delta
L1
L2
L3
Three-phase
3 wires
in “high leg” delta
L1
L2
L3
