Input Connections; Power Supply Reactance - WEG CFW100 User Manual

Installation and Connection

3.2.3.1 Input Connections

DANGER!
Provide a disconnect device for the inverter power supply. This device must cut off
the power supply whenever necessary (during maintenance for instance).
ATTENTION!
The power supply that feeds the inverter must have a grounded neutral.
NOTE!
The input power supply voltage must be compatible with the inverter rated voltage.
„
Power factor correction capacitors are not needed at the input (L/L1, N/L2) and
„
must not be installed at the output (U, V, W).
Power supply capacity
The CFW-11 is suitable for use in a circuit capable of delivering not more than 30.000 A
„
symmetrical (200 to 240 V).
In case the CFW100 is installed in power supplies with current capacity over 30.000 A
„
it is necessary to use proper protection circuits for those power supplies, such as fuses or
circuit breakers.

3.2.3.2 Power Supply Reactance

In a general way, the inverters of the CFW100 line can be installed directly in the power supply,
without reactance in the supply. However, check the following:
In order to prevent damages to the inverter and assure the expected useful life, you must
„
have a minimum impedance that provides a line voltage drop of 0.5 %. If the line impedance
(due to the transformers and cabling) is below the values listed in this table, we recommend
the use of a line reactance.
18 | CFW100
rms
,
rms