Q-208-081
5
2.2 Measurement parameter
Measurement
parameter
Measuring range (
６
)
Class
index
Operation method
Note
Current
[ A ]
Rating 5A
0～5A
0.5
(
７
)
Effective-value
arithmetic
Average value of each phase
current (R, S, T) (
８
)
Rating 1A
0～1A
Voltage
[ V ]
0～150V (3φ3W)
0～150/√3V (3φ4W)
0.5
(
７
)
Fundamental-wave
effective-value
arithmetic
3φ3W：Average value of each
line voltage
(RS,ST,TR) (
８
)
3φ4W：The average value of
each phase voltage
(RN,SN,TN)
Active power
[ W ]
Rating 5A
(1) 0～1000W
(2) 0～833.3W
(3) 0～750W
(4) 0～500W
(5) -1000～+1000W
(6) -833.3～+833.3W
(7) -750～+750W
(8) -500～+500W
0.5
(
７
)
Time division
multiplication
It can alter into the
measuring range of (1)～(8)
with front DIP switch.
Rating 1A
(1) 0～200W
(2) 0～166.7W
(3) 0～150W
(4) 0～100W
(5) -200～+200W
(6) -166.7～+166.7W
(7) -150～+150W
(8) -100～+100W
Reactive
power
[ var ]
Rating 5A
(1) LEAD 1000～LAG 1000var
(2) LEAD 833.3～LAG 833.3var
(3) LEAD 750～ LAG 750var
(4) LEAD 500～ LAG 500var
0.5
(
７
)
Time division
multiplication
It can alter into the
measuring range of (1)～(4)
with front DIP switch.
Rating 1A
(1) LEAD 200～LAG 200var
(2) LEAD 166.7～LAG 166.7var
(3) LEAD 150～ LAG 150var
(4) LEAD 100～ LAG 100var
Frequency
[ Hz ]
(1) 45～55Hz
(2) 55～65Hz
(3) 45～65Hz
0.5
(
７
)
Zero cross cycle
arithmetic
Voltage V(RS) or V(RN) is
measured.
It can alter into the
measuring range of (1)～(3)
with front DIP switch.
About measurement
(1)
A class index is a rated-frequency 50/60Hz ±10％ value. Linearity is within ±0.3％.
(2)
In ±10％ of rated frequencies, current, voltage, power, and reactive power are normally measured, in case
the voltage between input lines is 10V or more. If the voltage between input lines is 60V or more, it is
measurable to the frequency of 168Hz. (However, outside of an accuracy guarantee)
(3)
In case the voltage between input lines is 30V or more, frequency is measured normally.
Note(
６
) The critical value of measuring range constitutes the following.
Current：0～120％ of measuring range
Voltage：0～156V(3-phase 3-wire)，0～156/√3V(3-phase 4-wire)
［Measures to +30％ at the 120V(120/√3V) cases of rating］
Active power (One-side swing)：-20～+120％ of measuring range，
Active power (Both swing)，Reactive power：-120～+120％ of measuring range.
Note(
７
) In case current, power, and reactive power measure the next inverter output directly, an error becomes
large. Cycle control, SCR phase angle control, PWM control.
Note(
８
) S phase current of 3-phase 3-wire is for 2CT input, calculates in R phase and T phase current combination.
And, TR line voltage is for 2VT input, calculates in RS and ST line voltage combination.
