IM 253401-01E
4-17
4
Setting Measurement Conditions
Wiring Method and Computing Equation
• When the input and output are both two-wire
Select 1
Φ
2W, 1
Φ
3W, or 3
Φ
3W for the wiring method for the three-phase three-wire system
253502) and 1
Φ
2W for the wiring method for the three-phase four-wire system (253503).
Converter
Primary side
W1
Secondary side
W3
Output side
Computing equation
Efficiency(
µ
) = (W3/W1)
×
100
• When the input is two-wire and the output is three-wire
Select 1
Φ
2W, 1
Φ
3W, 3
Φ
3W, or 3V3A for the wiring method. This only applies to model
253503.
Converter
Primary side
W2
Secondary side
W1
Output side
W3
Computing equation
Efficiency(
µ
) = {(W1+W3)/W2}
×
100
4.9 Computing the Efficiency (Applies to WT130 with ROM Version 2.01 or later)
