Measuring And Readings - Powtran PI9000-S Series User Manual

Instruction of using adjustable power to charge the frequency inverter:
The adjustable power is decided by the frequency inverter input power, for the
single phase/3 phase 220v frequency inverter, we uase 220v AC/2A Regulator. Both
single phase and three phase frequency inverter can be charged by single phase Power
Surge(L+ connect R,N connects T) Because it is the same rectifier，so al l the DC bus
capacitor will be charged at the same time.
You should make sure the voltage(380v) of high voltage frequency inverter,
because when the capacitor being charged it almost doesn't need any current, so small
capacitor is enough(2A)
The instruction of using resisitor( incandescent lights) to charge frequency
inverters:
When charge the DC bus capacitor of drive system by connecting power directly,
then the time should not be less than 60 minutes. The operation should be carried on
under the condition of normal temperature and without load, and moreover ,should be
added resistor in the power supply cycle.
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.

9-5.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.
-- Last 100% rated power 2hours.
Voltage
AC 380V
380V Drive equipment charging circuit example
Chapter9.Mainternance and Repair
R
Inverter
S
T
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