Measurement Methods Of I/O Voltage, Current, And Electric Power - Omron 3G3JX User Manual

6-1 Inspection and Maintenance
Inspection Inspection
part item
Display Digital
Operator
*1. The life of the capacitor depends on ambient temperatures. Refer to the product life curve in Appendix-2.
When the capacitor stops operating at the end of the product's life, the Inverter must be replaced.
*2. Clean the Inverter periodically. Accumulated dust in or on the cooling fan or heat sink can cause the Inverter
to overheat.

Measurement Methods of I/O Voltage, Current, and Electric Power

6
Below are general measurement devices for I/O voltage, current, and electric power.
Measure effective values of fundamental wave for voltage, and all effective values for electric
power.
R/L1
Power
S/L2
supply
T/L3
Measurement
Measurement point
item
Power Phase-to-phase voltage
supply between R-S, S-T, and
voltage T-R
E (E
R
I
Power
supply Current R, S, T
current (I ) (I
R
I
I
Input
electric Between R-S, S-T
power (W
11
W
I
6-5
Inspection point
Check that the display
is clear.
Check that there are
no missing parts.
Check that the LED
indicators are lit
properly.
I
R
E
W
R
I
S
E W
S
I
T
E
T
Moving-iron voltmeter
) (E ) (E )
S T
Moving iron ammeter
) (I )
S T
) + (W )
12
Inspection
Inspection
period
method
Daily Periodic
Visual Normal operation
inspection Display can be
read
I
U/T1
U
R/L1
11
V/T2 I
S/L2
V
12
I
W/T3
W
T/L3
Measurement device
or
Rectifier voltmeter
Electrodynamic wattmeter
Standard
Criteria replacement
period
⎯
U
E W
U-V
01
V
Motor
E W
V-W 02
W
E
W-U
Measurement value
Note
reference
Commercial current
Effective
(200-V class)
value of
200 to 240 V, 50/60 Hz
fundamental
(400-V class)
wave
380 to 480 V, 50/60 Hz
All effective
values
All effective
Two-wattmeter method
values
Meter
⎯