Chapter 8 Maintenance and repair
119
380V drive system: use 1K/100W resistor. When the power is less than 380v, 100w
incandescent lights is also suitable. When using incandescent lights, the lights will extinct or
become very weak.
Voltage
AC 380V
Inverter
R
S
T
380V Drive equipment charging circuit example
8-5.Measuring and readings
※ If a general instrument is used to measure current, imbalance will exists for the current at the
input terminal. generally, the deviation is not more than 10%, that is normal. If the deviation
exceeds 30%, please inform the original manufacturer to replace rectifier bridge, or check if
the deviation of three-phase input voltage is above 5V or not.
※ If a general multi-meter is used to measure three-phase output voltage, the reading is not
accurate due to the interference of carrier frequency and it is only for reference.
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