20
modes require different Vn connection methods. Please refer to the wiring
diagram section for more details.
Three Phase Wiring Diagram
This meter can satisfy almost any kind of three phase wiring diagrams. Please
read this section carefully before choosing the suitable wiring method for your
power system.
Voltage and current input wiring mode can be set separately in the meter
parameter setting process. The voltage wiring mode can be set as 3-phase
4-line Wye (3LN), 3-phase 3-line direct connection(3LL), 3-phase 3-line open
delta(2LL), single phase 2-line(1LN) and single phase 3-line(1LL) . The current
input wiring mode can be set as 3CT, 2CT and 1CT. The voltage mode can be
grouped with the current mode as 3LN-3CT (3CT or 2CT, 3LL-3CT, 2LL-3CT, 2LL-
2CT, 1LL-2CT, 1LN-1CT).
2.3.3 Voltage Input Wiring
3-Phase 4-Line Wye Mode (3LN)
The 3-Phase 4-Line wye mode is commonly used in low voltage electric
distribution power systems. For voltage lower than 400LN/690LL Vac, power
line can be connected directly to the meter's voltage input terminal as shown in
Fig 2-9a. For high voltage systems (over 400LN/690LL Vac), PTs are required as
shown in Fig 2-9b. The meter should be set to 3LN for both voltage levels.
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