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2.
Installation and wiring
2.4 Wiring the measured voltage input (continued)
Wire the device according to the phase and wire type as shown in the following diagram.
Install a circuit breaker between the measured voltage input terminal and each wiring of R/S/T/N, L/N, and R/N/T so
that the power supply can be turned OFF quickly.
Important
• For safety purposes, turn off the mains power and the breaker to ensure there is no power supply while
you are working.
• Wire correctly so the phase sequence is correct. You will be unable to measure the power and energy
correctly if you fail to do so.
• To wire the voltage input terminals, use AWG18-14 wire (with a cross-section of 0.75 to 2.0 mm
2
) and
crimping terminals of the round shape or Y-shape (5.8mm wide or less) compatible with the M3 screw.
• The recommended torque for screwing the 3mm screws onto the terminal panel is 0.5 to 0.58 N·m.
Make sure the crimping terminal is pushed all the way in and tightened firmly. After fixing the wiring,
confirm that the wire is fixed securely.
R S T N
L N
3-phase 4-wire
1-phase 2-wire
R N T
1-phase 3-wire
(1-phase 2-wire voltage selected,
1-phase 3-wire composite)
R S T
3-phase 3-wire
