17-5
IM 253710-01E
Specifications
17
Measurement function indicating the phase difference of the fundamental voltage
and current between elements 1 to 3
Item
Symbol and Meaning
Phase difference U1-U2 (
°
)
φ
U1-U2 : Phase difference of the fundamental voltage (U2(1)) of element 2 with respect to the
fundamental voltage (U1(1)) of element 1.
Phase difference U1-U3 (
°
)
φ
U1-U3 : Phase difference of the fundamental voltage (U3(1)) of element 3 with respect to U1(1).
Phase difference U1-I1 (
°
)
φ
U1-I1 : Phase difference of the fundamental current (I1(1)) of element 1 with respect to U1(1).
Phase difference U1-I2 (
°
)
φ
U1-I2 : Phase difference of the fundamental current (I2(1)) of element 2 with respect to U1(1).
Phase difference U1-I3 (
°
)
φ
U1-I3 : Phase difference of the fundamental current (I3(1)) of element 3 with respect to U1(1).
Measurement functions (
Σ
functions) that are determined for each selected wiring
method (A, B)
(For details related to the determination of and the equations of
Σ
functions, see
“Appendix 2.”)
Item
Symbol and Meaning
Voltage (V)
U
Σ
(k) : rms value of the order harmonic voltage of order k
*1
, U
Σ
: Total rms value of the voltage
signal
*2
Current (A)
I
Σ
(k) : rms value of the harmonic current of order k, I
Σ
: Total rms value of the current signal
Active power (W)
P
Σ
(k) : Active power of the harmonic signal of order k, P
Σ
: Total active power
Apparent power (VA)
S
Σ
(k) : Apparent power of the harmonic signal of order k, S
Σ
: Total apparent power
Reactive power (var)
Q
Σ
(k) : Reactive power of the harmonic signal of order k, Q
Σ
: Total reactive power
Power factor
λΣ
(k) : Power factor of the harmonic signal of order k,
λΣ
: Total power factor
*1 k is an integer in the range from 0 to the upper limit of the harmonic analysis. 0th order is the DC component. The upper
limit is determined automatically (maximum is 500) by the frequency of the PLL source.
*2 Total is a value determined according to the equation given in “Appendix 2” from the fundamental signal (1st order) and all
harmonic components (2nd to the upper limit). The DC component can also be included.
Measurement function of the motor module
(For details related to the determination and equations of measurement functions,
see “Chapter 15.”)
Motor modules can be used on only products (PZ4000) with firmware version 2.01 or
later.
Item
Symbol and Meaning
Rotating speed
Speed: Motor’s rotating speed
Torque
Trq(k): Motor’s torque of harmonic order k
*1
, U: Total
*2
torque of the motor
Synchronous speed
Sync
Slip
Slip
Motor output
Pm: Motor’s mechanical output (mechanical power)
Motor efficiency
*3
η
mA or
η
mB: Ratio of the motor output versus the power consumption of the motor
Total efficiency
*3
η
mA or
η
mB: Ratio of the motor output versus the power consumed by the motor as well as the
converter through which power is fed to the motor
*1 k is an integer in the range from 0 to the upper limit of the harmonic analysis. 0th order is the DC component. The upper
limit is determined automatically (maximum is 500) by the frequency of the PLL source.
*2 Total is a value determined according to the equation given in “Appendix 2” from the fundamental signal (1st order) and all
harmonic components (2nd to the upper limit). The DC component can also be included.
*3 The symbols
η
mA and
η
mB are assigned to either the motor efficiency or total efficiency depending on the circuit wiring to
elements 1, 2, and 3 and the selected wiring method (A-B). For details, see section 15.8.
17.4 Measurement Function (Measurement Item)
