9-2
Inverter Application Precautions
Selection
Observe the following precautions when selecting an Inverter.
Installing Reactors
A large peak current will flow in the power input circuit when the Inverter is connected to a large-capacity
power transformer (600 kVA or higher) or when switching a compensating capacitor. Excessive peak current
can destroy the converter section. To prevent this, install a DC or AC reactor to improve the power supply
power factor.
If a thyristor convertor, such as a DC drive, is connected in the same power supply system, connect a DC or
AC reactor regardless of the power supply conditions shown in the following diagram.
Fig 9.1
Power sup-
ply (kVA)
DC or AC reactor
required
DC or AC reactor
not required
Inverter capacity (kVA)
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