General Inverter Electrical Measurements - Hyundai hirun N100 plus Instruction Manual

plus
N100 INSTRUCTION MANUAL

12.3 General Inverter Electrical Measurements

The following table specifies how to measure key system electrical param-
eters. The diagrams on the next page show inverter-motor systems the loca-
tion of measurement points for these parameters.
Circuit location
Parameter
of measurement
R-S, S-T, T-R
Supply voltage
E
(E ) (E ) (E )
1
R S T Current
Supply current
(I ) (I ) (I )
I
R
1
R-S, S-T
Supply power
W
(W )+(W )
1
Supply power
factor
Pf
1
U-V, V-W, W-U
Output voltage
E
(E ) (E ) (E )
0
U, V, W current
Output current
I
(I ) (I ) (I )
0
Output power
W
0
Calculate the output power factor from the output
Output power
voltage
factor
Pf
0
Use a meter indicating a fundamental wave effective value for voltage,
Note 1:
and meters indicating total effective values for current and power.
The inverter output has a PWM waveform, and low frequencies may
Note 2:
cause erroneous readings. However, the measuring instruments and methods
listed above provide comparably accurate results.
Note 3: A general-purpose digital volt meter (DVM) is not usually suitable to
measure a PWM waveform(not pure sinusoid)
Measuring instrument
R S T
S T
11 1 2
W
1
Pf =
3 E
1
1
U V W
U V W
U-V, V-W
(W )+(W )
0 1 0 2
E , output current , and output power
0
W
Pf =
0
3
Moving-coil type
voltmeter or recti-
fier type voltmeter
Moving-coil type
Ammeter
Electronic type
wattmeter
100(%)
I
1
Rectifier type
voltmeter
Moving-coil type
Ammeter
Electronic type
wattmeter
I
0
0
100(%)
E I
0 0
Reference
Notes
Value
Commercial
Fundamental
supply voltage
wave effective
(200V class)
value
200~220V 50Hz
200-230V 60Hz
Total effe-
(400V class)
ctive value 380-415V 50Hz
400-460v 60Hz
Total effe-
ctive value
Total effe-
ctive value
Total effe-
ctive value
Total effe-
ctivevalue
W
0