User Manual

23
Distribution system Source
3-phase 3-wire (L1, L2 and L3
Indicate which current sensors
will be connected: all 3 (3A) or
only 2 (A1 and A2, or A2 and
A3, or A3 and A1).
Three-wattmeter method with
virtual neutral (with 3 sensors
connected) or two-wattmeter
method or two-element method
or Aron method (with 2 sensors
connected).
A third sensor is not necessary
if two sensors of the same type,
same range, and same ratio are
connected. Otherwise, the third
sensor must be connected to
make current measurements.
3-phase star 3-wire
L1
L2
L3
3-phase delta 3-wire
L1
L2
L3
3-phase open delta 3-wire
L1
L2
L3
3-phase open delta 3-wire earthed junction of phases
L1
L2
L3
3-phase open delta 3-wire earthed corner of phase
L1
L2
L3
3-phase high leg delta 3-wire
L1
L2
L3
3-phase open high leg delta 3-wire
L1
L2
L3