3-12
IM 253710-01E
Combinations of Wiring Methods and Elements
The combination of the selectable wiring methods and elements varies depending on the
installation position of the power measurement modules as follows.
Elements that has
Selectable wiring methods
Combination
power measurement
of elements
modules installed
Only 1
1P2W
1
1 and 2
1P2W–1P2W
1–2
1P3W
(1 and 2)
3P3W
(1 and 2)
1, 2, and 3
1P2W–1P2W
1–2–3
(All three elements are handled as single-phase, two-wire systems.)
1P2W–1P3W
1–(2 and 3)
1P2W–3P3W
1–(2 and 3)
1P3W–1P2W
(1 and 2)–3
3P3W–1P2W
(1 and 2)–3
3V3A
(1, 2, and 3)
3P4W
(1, 2, and 3)
1, 2, 3, 4
1P2W–1P2W
1–2–3–4
(All four elements are handled as single-phase, two-wire systems.)
1P2W–1P3W
1–(2 and 3)–4
(Elements 1 and 4 are handled as single-phase, two-wire systems.)
1P2W–3P3W
1–(2 and 3)–4
(Elements 1 and 4 are handled as single-phase, two-wire systems.)
1P2W–3V3A
1–(2, 3, and 4)
1P2W–3P4W
1–(2, 3, and 4)
1P3W–1P2W
(1 and 2)–3–4
(Elements 3 and 4 are handled as single-phase, two-wire systems.)
1P3W–1P3W
(1 and 2)–(3 and 4)
1P3W–3P3W
(1 and 2)–(3 and 4)
3P3W–1P2W
(1 and 2)–3–4
(Elements 3 and 4 are handled as single-phase, two-wire systems.)
3P3W–1P3W
(1 and 2)–(3 and 4)
3P3W–3P3W
(1 and 2)–(3 and 4)
3V3A–1P2W
(1, 2, and 3)–4
3P4W–1P2W
(1, 2, and 3)–4
1P2W : single-phase, two-wire system
1P3W : single-phase, three-wire system
3P3W : three-phase, three-wire system
3V3A
: three-voltage, three-current system
3P4W : three-phase, four-wire system
Note
•
Check that the power measurement modules are installed in order starting from the element
number 1 slot. If you leave the slots that have smaller element numbers empty,
measurements will not be made properly. (For example, do not install a power measurement
module into the element number 2 slot and leave the element number 1 slot empty. Do not
install power measurement modules into element number 1 and 3 slots and leave the element
number 2 slot empty.) For the procedures on installing the modules, see section 3.3,
“Installing the Input Module.”
•
When the sensor input module is installed into the element number 4 slot, only up to three
power measurement modules can be installed. In this case, you cannot select a wiring
method that uses four power measurement modules.
•
After wiring, the wiring method must be selected. See section 5.2, “Selecting the Wiring Method.”
•
The thick lines on the wiring diagrams are the sections where the current flows. Use
appropriate wires that are suitable for the current.
•
To measure the apparent power and power factor more accurately when measuring the
power of an unbalanced three-phase circuit, it is recommended that a three-voltage, three-
current (3V3A) system be used to make the measurement.
•
In 3P3W and 3V3A systems, the wiring system may be different between the PZ4000 and
another product (another digital power meter) due to the differences in the input element that
is wired. To achieve correct measurements, check the wiring system.
3.7 Directly Wiring the Circuit under Measurement