MEASUREMEN TESTING POINTS TESTER REMARKS
Input voltage
Vi
V1 V2 V3 Moving iron type
Input current
li
A2 A2 A3 Moving iron type
Input power
Pi
W1 W2 Electrodynamometer Pi=W1+W2
Input power factor
PFi
Onput voltage
Vo
V4 V5 V6 Rectifier type + - 3% of maximum output voltage
Onput current
Io
A4 A5 A6 Moving iron type
Current should be under inverter rated
current
Onput power
Po
W3 W4 Electrodynamometer Po=W3+W4
Output power
factor
PFo
69
Reference
a. Measurement of Voltage and Current
PFo= Po x 100%
√3Vo • Io
PFi= Pi x 100%
√3Vo • Io
DANGER!
Hazardous voltage within can cause serious injury or death. Operating drive from keypad may disable
safety circuits and result in danger or injury. Only qualified personnel should work on this equipment
after familiarization with its operation. Turn OFF and lock out power at main panel. Allow capacitors to
bleed off prior to servicing.
The result for measuring primary and secondary voltage and current will be somewhat different
because of the variety of measuring instruments and harmonics generated by inverter. Refer to the
following illustration for measurement.
To Next Page
Loading...