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2. Example of measurement
(1)
Measurement with single-phase 100V, 2 loads
When the following connection is established, each current measurement for I, Ia, and Ib is possible.
(The clamp in the following figure indicates the measurement point of AC current sensor.)
However, when measured by the GL100, it is not necessarily I = Ia + Ib (Since it is calculated in vector quantity.).
I
100V
(2)
Single-phase 3-wire (100V and 200V)
(The clamp in the following figure indicates the measurement point of AC current sensor.)
1) Single-phase 3-wire (AC1 3W): Measured at the clamp 1 (CH1) and clamp 2 (CH2).
Effective current
Current effective value of I1 = Ia + Ib is measured at the clamp 1 (CH1).
Effective current
Current effective value of I3 = -Ia - Ic is measured at the clamp 2 (CH2).
Note: Positive value is displayed regardless of the current direction because it is effective value.
Total power is calculated in accordance with the set voltage 100V and power factor.
2) Single-phase 2-wire (AC1 2W): Measured at the clamp 3, clamp 4 and clamp 5 in single-phase 2-wire mode.
Effective current
Current effective value of Ib is measured at the clamp 3.
Effective current
Current effective value of -Ic is measured at the clamp 4.
Note: Positive value is displayed regardless of the current direction because it is effective value.
Effective current
Crrent effective value of Ia is measured at the clamp 5.
Each power is calculated in accordance with the set voltage 100V and power factor at the clamp 3 and clamp 4.
Power is calculated in accordance with the set voltage 200V and power factor at the clamp 5.
Clamp 1 (CH1)
I1
200V
I2
I3
Clamp 2
the displayed data does not necessarily follow l = la + lb
(since the results are calculated in vector quantity.).
Clamp 1
Zb
100V
100V
CHAPTER 2 Checks and Preparation
Clamp 2
Clamp 3
Ib
Ia
Za
the designated power factor.
Clamp 3
Clamp 5
Ib
Ia
Za
Ic
Clamp 4
in effective value.
in effective value.
I1-I2-I3=0
I1=Ia+Ib
I2=Ic-Ib
I3=Ia-Ic
2-19
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