3
The 3-Phase 4-Line wiring mode is commonly used in low voltage electric distribution power
systems. The UL(voltage wiring mode) parameter should be set as 3Ln, the IL(current
wiring mode) parameter should be set as 3C at the parameter setting interface.
B Three-Phase Three-Line open Delta Mode (2LL, 2CT)
2PT open delta wiring mode is often used in high voltage systems. For this mode, the UL
(the voltage wiring mode) should be set as “2LL”, and the IL (the current wiring mode)
should be set as “2C” at the parameter setting interface.
2.4.2 Power supply, communication interface, and Digital input
A. Power Supply
The power supply for this meter is AC 85-265V (45-55Hz) or DC 85-300V. Terminals for the
power supply are (L/+,N/-). The typical power supply wiring is as followed:
If the quality of power is poor or there is an EMI problem, it’s recommended to equip an
EMC filter in the auxiliary power supply loop. The mode of wiring is as followed.
B. Communication Interface
This meter support RS485 serial communication and the ModbusRTU protocol. Terminals
