YOKOGAWA WT3002E User Manual page 143

7.11 Harmonic Measurement Specifications
Measurement Functions Determined for Each Input Element
Item
Voltage (V)
Current (A)
Active power (W)
Apparent power (VA)
Reactive power (var)
Power factor
Phase difference (°)
*3
Impedance (Ω) of the load
circuit
*3
Resistance and reactance
Harmonic distortion factor [%]
Total harmonic distortion [%]
Telephone harmonic factor
(Applicable standard IEC34-1
(1996))
Telephone influence factor
(Applicable standard
IEEE Std 100 (1996))
Harmonic voltage factor
*3 *6
Harmonic current factor
*1 Order k is an integer in the range from 0 to the upper limit of the measured order. 0
The upper limit is determined automatically (maximum is 100
*2 The total is a value determined according to the equation given on page 7-42 from the fundamental signal (1
order) and all harmonic components (2
also be included. The total value cannot be measured with the harmonic measurement in normal measurement
mode.
*3 Cannot be measured in IEC harmonic measurement mode.
*4 Total harmonic is a value determined according to the equation given in the next section from all harmonic
nd
components (2 to the upper limit of measured order).
*5 Measurement functions specific to the IEC or IEEE standard.
*6 The equation may vary depending on the definitions given in the respective standard. For details, see the
respective standard.
7-40
Symbol and Meaning
U(k): rms value of the harmonic voltage of order k
I(k): rms value of the harmonic current of order k
P(k): Active power of the harmonic signal of order k
S(k): Apparent power of the harmonic signal of order k S: Total apparent power (total value
Q(k): Reactive power of the harmonic signal of order k Q: Total reactive power (total value
λ(k): Power factor of the harmonic signal of order k
φ(k): Phase difference between the harmonic voltage and current of order k, φ: total phase
φU(k): P hase difference of each harmonic voltage U(k) with respect to the fundamental signal
U(1)
φI(k): P hase difference of each harmonic current I(k) with respect to the fundamental signal
I(1)
Z(k): Impedance of the load circuit observed by the k
*3
Rs(k): Resistance observed by the k
resistor R, (Ω) of the load circuit inductor L, and capacitor C connected in series
Xs(k): Reactance observed by the k
resistor R, inductor L, and capacitor C connected in series
Rp(k): Resistance observed by the k
resistor R, inductor L, and capacitor C connected in parallel
Xp(k): Reactance observed by the k
resistor R, inductor L, and capacitor C connected in parallel
Uhdf(k): The ratio of the harmonic voltage U(k) to U(1) or U expressed as a percentage.
Ihdf(k): The ratio of the harmonic current I(k) to I(1) or I expressed as a percentage.
Phdf(k): The ratio of the active power P(k) of the harmonic signal to P(1) or P expressed as a
percentage.
Uthd: The ratio of the total harmonic voltage to U(1) or U
Ithd: The ratio of the total harmonic current to I(1) or I expressed as a percentage.
Pthd: The ratio of the active power of the total harmonic signal to P(1) or P expressed as a
percentage.
*3 *5
Uthf: Voltage telephone harmonic factor, Ithf: Current telephone harmonic factor
*3 *5
Utif: Voltage telephone influence factor, Itif: Current telephone influence factor
*3 *6 hvf: harmonic voltage factor
hcf: harmonic current factor
nd
to the upper limit of the measured order). The DC component can
*1
U: Rms voltage (total value
I: Rms current (total value
P: Active power (total value
λ: Total power factor (total value
th
order harmonic signal.
th
order harmonic signal of the load circuit that has a
th order harmonic signal of the load circuit that has a
th
order harmonic signal of the load circuit that has a
th
order harmonic signal of the load circuit that has a
*4
expressed as a percentage.
th
th
) by the frequency of the PLL source.
*2
)
*2
)
*2
)
*2
)
order is the DC component.
st
IM WT3001E-51EN
*2
)
*2
)