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13 Maintenance and Inspection
High-function General-purpose Inverter RX2 Series User’s Manual
13-5 Test Methods
13
13-5-5 Smoothing Capacitor Life Curve
Note 1. Use an instrument that indicates effective values of fundamental wave for output voltage, and use instru-
ments that indicate all effective values for current and power.
2. The output waveform of inverter generates errors especially at low frequency because it is a waveform
control by PWM. Take care because a tester (general-purpose product) may not be adapted due to
noise.
Note 1. The ambient temperature is a temperature measured at a position about 5 cm from the bottom center of
the inverter. (atmospheric temperature)
If the inverter is stored inside the panel, it is in-panel temperature.
2. The smoothing capacitor is a finite life component which occurs chemical reaction inside, replacement is
required after 10 years of use (It is a designed expected life, not a guaranteed value).
However, if the inverter is used in an environment at high temperature or in a heavy-load environment
where the its rated current is exceeded, the life is significantly shortened.
13-5-5 Smoothing Capacitor Life Curve
Measurement method of
output voltage
Inverter
Motor
Moving coil type
300 V (200 V class)
600 V (400 V class)
Diode
600 V 0.1 A or above (200 V class)
1000 V 0.1 A or above (400 V class)
Effective value of fundamental
wave VAC
VAC=1.1×VDC
-10
Ambient temperature (°C)
In the case of 24-hour energization/day
Capacitor life (years)
Note When the inverter is continuously driven at
80% of ND rated current.
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